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Operating systems stack vulnerabilities · Page 70

Vulnerabilities published for Operating systems in the last 30 days: 6531. Listed in the KEV catalogue: 4.

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Vulnerabilities: 160273

  1. CVE-2026-98987

    Not ratedEPSS 0.17%Fix available

    namespace: look at the topmost mount for a mount namespace file

    In the Linux kernel, the following vulnerability has been resolved: namespace: look at the topmost mount for a mount namespace file attach_recursive_mnt() preallocates a mountpoint for the root of the topmost mount of the source so that a mount that already sits at the destination can be put on top of the source or on top of one of its propagated copies. The copies are made without CL_COPY_MNT_NS_FILE so their chain of overmounts is shorter than the source's. It ends below the first bind mount of a mount namespace file. So while the loop walks up the chain of the source it remembers the mountpoint of that mount in "shorter" and the existin

    linux linux linux linux-hwe-edge linux-aws-5.0 linux-aws-5.3 linux-azure linux-azure-5.3 linux-azure-edge linux-gcp linux-gcp-5.3 linux-gke-4.15Operating systems
    • Update to 7.2.11-1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  2. CVE-2026-98986

    Not ratedEPSS 0.17%Fix available

    namespace: remove the fsnotify marks of a mount namespace in process context

    In the Linux kernel, the following vulnerability has been resolved: namespace: remove the fsnotify marks of a mount namespace in process context mnt_ns_release() drops the last passive reference of a mount namespace and removes its fanotify marks via fsnotify_mntns_delete(). That takes the mutex of every group with a mark on the namespace and the spinlock of the connector. Fine from process context. But mnt_ns_tree_remove() hands the reference the namespace was allocated with to call_rcu() and so the marks are removed from the RCU softirq: BUG: sleeping function called from invalid context at kernel/locking/mutex.c:623 in_atomic(): 1,

    linux linux linux linux-hwe-edge linux-aws-5.0 linux-aws-5.3 linux-azure linux-azure-5.3 linux-azure-edge linux-gcp linux-gcp-5.3 linux-gke-4.15Operating systems
    • Update to 7.2.11-1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  3. CVE-2026-98985

    Not ratedEPSS 0.18%Fix available

    namespace: check the mounts before reading their parents in pivot_root()

    In the Linux kernel, the following vulnerability has been resolved: namespace: check the mounts before reading their parents in pivot_root() path_pivot_root() reads the parents of new_root and of the caller's root and checks whether they are shared before it checks that either mount is in the caller's mount namespace. Only namespace_sem is held. That's fine for a mount that is in the caller's mount namespace. But new_root can be a file descriptor to a mount that has been unmounted and that only the file descriptor keeps alive. If that mount stayed attached to its parent when it was unmounted nothing pins the parent for it. The final mntput

    linux linux linux linux linux linux-aws linux-azure linux-lts-xenial linux linux-aws linux-aws-hwe linux-azureOperating systems
    • Update to 4.1
    • Update to 7.2.11-1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  4. CVE-2026-98984

    Not ratedEPSS 0.18%Fix available

    dcache: don't put a mountpoint on a dentry that's being removed

    In the Linux kernel, the following vulnerability has been resolved: dcache: don't put a mountpoint on a dentry that's being removed rmdir(), unlink() and rename() call dont_mount() on the victim and then detach_mounts() with the victim's inode locked. do_lock_mount() takes the inode lock of the mountpoint and checks cant_mount() so a mount can't show up after detach_mounts(). But attach_recursive_mnt() makes a second mountpoint for the root of the source mount so that the mounts already located at the destination can be put on top of it. No inode is locked for that one and d_set_mounted() only refuses a dentry that is unlinked. Between det

    linux linux linux linux linux linux-aws linux-azure linux-lts-xenial linux linux-aws linux-aws-hwe linux-azureOperating systems
    • Update to 4.10
    • Update to 4.11
    • Update to 4.2
    • Update to 4.5
    • Update to 6.12.113-1
    • Update to 7.2.11-1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  5. CVE-2026-98983

    Not ratedEPSS 0.16%Fix available

    unshare: don't drop active namespace references that were never taken

    In the Linux kernel, the following vulnerability has been resolved: unshare: don't drop active namespace references that were never taken Active references on the namespaces of an nsproxy are taken when the nsproxy is installed into a task in switch_task_namespaces() and copy_namespaces() and dropped again by put_nsproxy() through deactivate_nsproxy(). But ksys_unshare() calls put_nsproxy() on an nsproxy that was never installed when set_cred_ucounts() fails. The new namespaces of that nsproxy go from zero to minus one and the namespaces shared with the caller lose a reference that belongs to the nsproxy the caller keeps using: WARNING:

    linux linux linux linux linux linux-hwe-edge linux-aws-5.0 linux-aws-5.3 linux-azure linux-azure-5.3 linux-azure-edge linux-gcpOperating systems
    • Update to 5.16
    • Update to 6.13
    • Update to 6.19
    • Update to 6.2
    • Update to 6.7
    • Update to 7.1
    • Update to 7.2.11-1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  6. CVE-2026-98982

    High · CVSS 7.8EPSS 0.16%Fix available

    namespace: don't let a pseudo dentry become the root of a mount

    In the Linux kernel, the following vulnerability has been resolved: namespace: don't let a pseudo dentry become the root of a mount d_alloc_pseudo() hands out dentries for pipes, sockets and other files that are never anyone's child or parent. They carry DCACHE_NORCU and dentry_free() frees them right away because no lockless path walk can ever reach them. That holds as long as such a dentry isn't the root of a mount. But bind mounting /proc/self/fd/<fd> of such a file does exactly that. Most callers of alloc_file_pseudo() put their files on kernel-internal mounts and may_copy_tree() refuses those. bpf_token_create() doesn't. It places the

    linux linux linux linux linux-hwe-edge linux-aws-5.0 linux-aws-5.3 linux-azure linux-azure-5.3 linux-azure-edge linux-gcp linux-gcp-5.3Operating systems
    • Update to 6.12.113-1
    • Update to 7.2.11-1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  7. CVE-2026-98981

    High · CVSS 8.8EPSS 0.16%Fix available

    namespace: unhash a dentry before detaching the mounts on it

    In the Linux kernel, the following vulnerability has been resolved: namespace: unhash a dentry before detaching the mounts on it unlink(), rmdir() and rename() remove the entry from the filesystem, call detach_mounts() on the entry with the inode locked and then call d_delete() once the inode is unlocked. The thing is that between detach_mounts() and d_delete() the dentry is still hashed and positive. But after detach_mounts() nothing covers the dentry anymore. A lookup that finds this dentry in the dcache can uncover what the mounts hid. That's a problem when unlinking files or directories that are mountpoints in other mount namespaces.

    linux linux linux linux linux linux-aws linux-azure linux-lts-xenial linux linux-aws linux-aws-hwe linux-azureOperating systems
    • Update to 7.2.11-1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  8. CVE-2026-98980

    High · CVSS 8.8EPSS 0.18%Fix available

    namei: don't reveal overmounted entries in refwalk

    In the Linux kernel, the following vulnerability has been resolved: namei: don't reveal overmounted entries in refwalk In rcuwalk the dentry is validated before it is accepted. step_into() step_into() rechecks d_seq and __follow_mount_rcu() rechecks mount_lock. An entry that gets unlinked in between causes the lookup to retry and miss. A refwalk doesn't do this. lookup_fast() takes a reference on the hashed dentry and simply accepts it. So an unlink that happens after the reference was taken isn't seen by refwalk. That's fine for a simple file. We just happened to open it before it was unlinked, no problem. For a mountpoint and specifical

    linux linux linux linux linux linux-aws linux-azure linux-lts-xenial linux linux-aws linux-aws-hwe linux-azureOperating systems
    • Update to 6.12.113-1
    • Update to 7.2.11-1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  9. CVE-2026-98979

    Not ratedEPSS 0.18%Fix available

    namespace: refuse an automount below a mount that is in no namespace

    In the Linux kernel, the following vulnerability has been resolved: namespace: refuse an automount below a mount that is in no namespace It's possible to add autmounts even when the parent mount isn't in the mount namespace of the caller. The only requirement we have is that the parent mount namespace must not be NULL, i.e., unmounted. Problem is that clone_private_mount() has MNT_NS_INTERNAL which makes that trivially true. So that passes the test and attach_recursive_mnt() accepts that as a mount point and funny enough, count_mounts() dereferences MNT_NS_INTERNAL. The problem is it is an error pointer... So we can reach this in userspac

    linux linux linux linux linux linux-hwe-edge linux-aws-5.0 linux-aws-5.3 linux-azure linux-azure-5.3 linux-azure-edge linux-gcpOperating systems
    • Update to 6.12.113-1
    • Update to 7.2.11-1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  10. CVE-2026-98978

    High · CVSS 8.4EPSS 0.17%Fix available

    namespace: never expire a locked mount

    In the Linux kernel, the following vulnerability has been resolved: namespace: never expire a locked mount Locked mounts are special. They protect the underlying files and directories from being revealed. do_umount() refuses to unmount locked mounts but shrink_submounts() doesn't. A shrinkable mount can become locked once the owner of a user namespace puts it beneath a locked mount with MOVE_MOUNT_BENEATH. The locked property now moves to the mount at the bottom making it possible to unmount the top mount. So umount() of an unlocked ancestor now expires the bottom mount first and the covered directory is revealed: move_mount(c -> x/hid

    linux linux linux linux linux linux linux-aws linux-azure linux-lts-xenial linux linux-aws linux-aws-hweOperating systems
    • Update to 7.2.11-1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  11. CVE-2026-98977

    Not ratedEPSS 0.18%Fix available

    namespace: handle mount locking for automounts correctly

    In the Linux kernel, the following vulnerability has been resolved: namespace: handle mount locking for automounts correctly If mounts are propagated across user namespaces, attach_recursive_mnt() locks every copy of the source mount to protect overmounts from vanishing and revealing the underlying files or directories. The user namespace is taken from the caller's mount namespaces since this is where the mounts end up. Except, that's not always true. Automounts may legitimately get popped in by tasks located in a different mount and user namespace during path lookup. Then check doesn't make sense at that point. The copy in the namespace

    linux linux linux linux linux linux linux-aws linux-azure linux-lts-xenial linux linux-aws linux-aws-hweOperating systems
    • Update to 3.9
    • Update to 7.2.11-1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  12. CVE-2026-98976

    High · CVSS 7.8EPSS 0.14%Fix available

    namespace: keep the lock on a mount that a propagated copy is moved beneath

    In the Linux kernel, the following vulnerability has been resolved: namespace: keep the lock on a mount that a propagated copy is moved beneath attach_recursive_mnt() transfers MNT_LOCKED from the top mount to the mount that is moved beneath it with MOVE_MOUNT_BENEATH. This allows the owner of a user namespace to replace its locked /proc or its root. The mount beneath takes on the job of covering the underlying mountpoint allowing the top mount to be unmounted. Consider two mount namespaces: (H) The host H has a shared mount P with a secret in P/d (Z) Z is a user namespace made from M. Its copy of P receives propagation from the host'

    linux linux linux linux-hwe-edge linux-aws-5.0 linux-aws-5.3 linux-azure linux-azure-5.3 linux-azure-edge linux-gcp linux-gcp-5.3 linux-gke-4.15Operating systems
    • Update to 7.2.11-1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  13. CVE-2026-98975

    High · CVSS 7.8EPSS 0.16%Fix available

    xfs: stop exchanging reflink flags when exchanging mappings

    In the Linux kernel, the following vulnerability has been resolved: xfs: stop exchanging reflink flags when exchanging mappings When an exchange covers both files from offset 0 to i_disk_size, xmi_can_exchange_reflink_flags() assumes every mapping moved and hands the reflink flag over to the other file. That assumption is wrong. A file can still own shared blocks past i_disk_size, e.g. after EXCHANGE_RANGE_TO_EOF sets a smaller size without unmapping anything. The flag is cleared anyway, and the next write to such a block happens in place instead of CoW, corrupting the other file that shares it. Commit a23eca88448e ("xfs: fix exchange-r

    linux linux linux linux linux linux-azure linux-aws-hwe linux-azure linux-gcp linux-hwe linux-hwe-edge linux-oracleOperating systems
    • Update to 7.2.11-1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  14. CVE-2026-98974

    High · CVSS 7.8EPSS 0.16%Fix available

    xfs: fix exchange-range-to-eof file size exchange

    In the Linux kernel, the following vulnerability has been resolved: xfs: fix exchange-range-to-eof file size exchange Norbert Szetei posted a patch containing an incomplete description of a bug in XFS_IOC_EXCHANGE_RANGE's TO_EOF flag. The bug tricks exchange-range into modifying a file so that it has shared blocks starting beyond EOF, which is never allowed because files never have written data beyond EOF, and you can only share written data blocks. This is key to all the incorrect behavior that follows. Eventually I got from Norbert a description of what's going wrong: > Fair. Here it is with physical block numbers, 4k blocks. peer is t

    linux linux linux linux linux-hwe-edge linux-aws-5.0 linux-aws-5.3 linux-azure linux-azure-5.3 linux-azure-edge linux-gcp linux-gcp-5.3Operating systems
    • Update to 7.2.11-1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  15. CVE-2026-98973

    Not ratedEPSS 0.16%Fix available

    drm/bridge: Fix unlocked list_del in drm_bridge_add()

    In the Linux kernel, the following vulnerability has been resolved: drm/bridge: Fix unlocked list_del in drm_bridge_add() When re-adding a bridge that was previously removed, drm_bridge_add() drops it from bridge_lingering_list without holding bridge_lock. Both bridge_list and bridge_lingering_list are protected by bridge_lock, as they are concurrently modified by drm_bridge_remove() and __drm_bridge_free(), and walked by the debugfs 'bridges' file. Running the list_empty() test and the list_del_init() outside of the lock may therefore corrupt either list. Perform both under bridge_lock.

    linux linux linux linux-hwe-edge linux-aws-5.0 linux-aws-5.3 linux-azure linux-azure-5.3 linux-azure-edge linux-gcp linux-gcp-5.3 linux-gke-4.15Operating systems
    • Update to 7.2.11-1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  16. CVE-2026-98972

    Not ratedEPSS 0.16%Fix available

    cgroup/cpuset: Don't access cpuset_cgrp_subsys.root in is_in_v2_mode()

    In the Linux kernel, the following vulnerability has been resolved: cgroup/cpuset: Don't access cpuset_cgrp_subsys.root in is_in_v2_mode() After seeing the patch [1] to guard is_in_v2_mode() with RCU, it makes me realize that is_in_v2_mode() may be called in a context where a new cgroup filesystem is being rebound with stale cpuset_cgrp_subsys.root pointer. Avoid this potential UaF situation by adding a new cpuset_v2_mode flag which is set when the cpuset_v2_mode mount option is used. This flag is written into only when cpuset_bind() is being called with a stable cpuset_cgrp_subsys.root value. The is_in_v2_mode() helper is modified to read

    linux linux linux linux linux linux-azure linux-aws-hwe linux-azure linux-gcp linux-hwe linux-hwe-edge linux-oracleOperating systems
    • Update to 7.2.11-1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  17. CVE-2026-98971

    Not ratedEPSS 0.17%Fix available

    gpio: exar: initialize the ID before registering its cleanup

    In the Linux kernel, the following vulnerability has been resolved: gpio: exar: initialize the ID before registering its cleanup devm_add_action_or_reset() invokes the cleanup action immediately when registering the action fails. gpio_exar_probe() currently stores the allocated ID in exar_gpio only after registering the action, so that failure makes exar_devm_ida_free() release ID 0. If the allocated ID is nonzero, this leaks that ID and can free ID 0 belonging to another device. Store the ID before registering the cleanup action so both the immediate failure path and normal device teardown release the correct allocation.

    linux linux linux linux linux linux-hwe-edge linux-aws-5.0 linux-aws-5.3 linux-azure linux-azure-5.3 linux-azure-edge linux-gcpOperating systems
    • Update to 6.12.113-1
    • Update to 7.2.11-1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  18. CVE-2026-98970

    Not ratedEPSS 0.18%Fix available

    drm/vc4: Free the BO cache size list on teardown

    In the Linux kernel, the following vulnerability has been resolved: drm/vc4: Free the BO cache size list on teardown vc4_bo_cache_destroy() purges the cached BOs but never frees the size list, leaking it on every unbind.

    linux linux linux linux linux linux-azure linux-aws-hwe linux-azure linux-gcp linux-hwe linux-hwe-edge linux-oracleOperating systems
    • Update to 6.12.113-1
    • Update to 7.2.11-1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  19. CVE-2026-98969

    Not ratedEPSS 0.18%Fix available

    net/sched: em_text: reject unterminated algo before autoload

    In the Linux kernel, the following vulnerability has been resolved: net/sched: em_text: reject unterminated algo before autoload This is a follow-up to commit 9c572a83037a ("net/sched: fix potential stack infoleak in em_text_dump()"), which zero-initialised the dump-side struct. Sashiko pointed at a pre-existing bug that exposed the change-side input-validation gap open. em_text_change() casts the raw netlink attribute payload to struct tcf_em_text and passes conf->algo, a 16-byte array with no enforced NUL terminator, to textsearch_prepare(). On the TS_AUTOLOAD retry textsearch_prepare() calls request_module("ts_%s", algo); vsnprintf() w

    linux linux linux linux linux linux linux-aws linux-azure linux-lts-xenial linux linux-aws linux-aws-hweOperating systems
    • Update to 6.12.113-1
    • Update to 7.2.11-1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  20. CVE-2026-98968

    High · CVSS 8.1EPSS 0.53%Fix available

    amt: send the relay's General Query directly from the receive path

    In the Linux kernel, the following vulnerability has been resolved: amt: send the relay's General Query directly from the receive path An skb queued in a qdisc can outlive the tunnel it references through a raw pointer in skb->cb. For example, with igmp_qrv set to 1 on the relay a tunnel lives for 135s, so a netem delay of 180s on the amt device outlives it; when the tunnel expires and is freed, the subsequent dequeue triggers a use-after-free in amt_dev_xmit(). BUG: KASAN: slab-use-after-free in amt_dev_xmit+0x2763/0x2e20 Call Trace: amt_dev_xmit+0x2763/0x2e20 [drivers/net/amt.c:1262] dev_hard_start_xmit+0x22f/0x620 sch_direc

    linux linux linux linux linux linux-hwe-edge linux-aws-5.0 linux-aws-5.3 linux-azure linux-azure-5.3 linux-azure-edge linux-gcpOperating systems
    • Update to 6.12.113-1
    • Update to 7.2.11-1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

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