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In den letzten 30 Tagen veröffentlichte Sicherheitslücken für linux: 0. Davon im KEV-Katalog: 0.

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  1. CVE-2023-0045

    Mittel · CVSS 4.7EPSS 2,4%Öffentlicher ExploitKorrektur verfügbar

    Incorrect indirect branch prediction barrier in the Linux Kernel

    The current implementation of the prctl syscall does not issue an IBPB immediately during the syscall. The ib_prctl_set  function updates the Thread Information Flags (TIFs) for the task and updates the SPEC_CTRL MSR on the function __speculation_ctrl_update, but the IBPB is only issued on the next schedule, when the TIF bits are checked. This leaves the victim vulnerable to values already injected on the BTB, prior to the prctl syscall.  The patch that added the support for the conditional mitigation via prctl (ib_prctl_set) dates back to the kernel 4.9.176. We recommend upgrading past commit a664ec9158eeddd75121d39c9a0758016097fa96

    • Auf 5.4.0-144.161 aktualisieren
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  2. CVE-2023-31084

    Mittel · CVSS 5.5EPSS 0,41%Korrektur verfügbar

    CVE-2023-31084

    An issue was discovered in drivers/media/dvb-core/dvb_frontend.c in the Linux kernel 6.2. There is a blocking operation when a task is in !TASK_RUNNING. In dvb_frontend_get_event, wait_event_interruptible is called; the condition is dvb_frontend_test_event(fepriv,events). In dvb_frontend_test_event, down(&fepriv->sem) is called. However, wait_event_interruptible would put the process to sleep, and down(&fepriv->sem) may block the process.

    • Auf 5.4.0-162.179 aktualisieren
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  3. CVE-2023-31083

    Mittel · CVSS 4.7EPSS 0,33%Korrektur verfügbar

    CVE-2023-31083

    An issue was discovered in drivers/bluetooth/hci_ldisc.c in the Linux kernel 6.2. In hci_uart_tty_ioctl, there is a race condition between HCIUARTSETPROTO and HCIUARTGETPROTO. HCI_UART_PROTO_SET is set before hu->proto is set. A NULL pointer dereference may occur.

    • Auf 5.4.0-166.183 aktualisieren
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  4. CVE-2023-1998

    Mittel · CVSS 5.6EPSS 1,38%Öffentlicher ExploitKorrektur verfügbar

    Spectre v2 SMT mitigations problem in Linux kernel

    The Linux kernel allows userspace processes to enable mitigations by calling prctl with PR_SET_SPECULATION_CTRL which disables the speculation feature as well as by using seccomp. We had noticed that on VMs of at least one major cloud provider, the kernel still left the victim process exposed to attacks in some cases even after enabling the spectre-BTI mitigation with prctl. The same behavior can be observed on a bare-metal machine when forcing the mitigation to IBRS on boot command line. This happened because when plain IBRS was enabled (not enhanced IBRS), the kernel had some logic that determined that STIBP was not needed. The IBRS bit im

    • Auf 5.4.0-152.169 aktualisieren
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  5. CVE-2023-2194

    Mittel · CVSS 6.7EPSS 0,24%Korrektur verfügbar

    CVE-2023-2194

    An out-of-bounds write vulnerability was found in the Linux kernel's SLIMpro I2C device driver. The userspace "data->block[0]" variable was not capped to a number between 0-255 and was used as the size of a memcpy, possibly writing beyond the end of dma_buffer. This flaw could allow a local privileged user to crash the system or potentially achieve code execution.

    • Auf 5.4.0-156.173 aktualisieren
    Veröffentlicht Aktualisiert
  6. CVE-2023-2177

    Mittel · CVSS 5.5EPSS 0,21%Korrektur verfügbar

    CVE-2023-2177

    A null pointer dereference issue was found in the sctp network protocol in net/sctp/stream_sched.c in Linux Kernel. If stream_in allocation is failed, stream_out is freed which would further be accessed. A local user could use this flaw to crash the system or potentially cause a denial of service.

    • Auf 5.4.0-128.144 aktualisieren
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  7. CVE-2023-28328

    Mittel · CVSS 5.5EPSS 0,22%Korrektur verfügbar

    CVE-2023-28328

    A NULL pointer dereference flaw was found in the az6027 driver in drivers/media/usb/dev-usb/az6027.c in the Linux Kernel. The message from user space is not checked properly before transferring into the device. This flaw allows a local user to crash the system or potentially cause a denial of service.

    • Auf 5.4.0-144.161 aktualisieren
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  8. CVE-2023-28327

    Mittel · CVSS 5.5EPSS 0,19%Korrektur verfügbar

    CVE-2023-28327

    A NULL pointer dereference flaw was found in the UNIX protocol in net/unix/diag.c In unix_diag_get_exact in the Linux Kernel. The newly allocated skb does not have sk, leading to a NULL pointer. This flaw allows a local user to crash or potentially cause a denial of service.

    • Auf 5.4.0-144.161 aktualisieren
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  9. CVE-2023-2166

    Mittel · CVSS 5.5EPSS 0,2%Korrektur verfügbar

    CVE-2023-2166

    A null pointer dereference issue was found in can protocol in net/can/af_can.c in the Linux before Linux. ml_priv may not be initialized in the receive path of CAN frames. A local user could use this flaw to crash the system or potentially cause a denial of service.

    • Auf 5.4.0-144.161 aktualisieren
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  10. CVE-2023-1382

    Mittel · CVSS 4.7EPSS 0,19%Korrektur verfügbar

    CVE-2023-1382

    A data race flaw was found in the Linux kernel, between where con is allocated and con->sock is set. This issue leads to a NULL pointer dereference when accessing con->sock->sk in net/tipc/topsrv.c in the tipc protocol in the Linux kernel.

    • Auf 5.4.0-144.161 aktualisieren
    Veröffentlicht Aktualisiert
  11. CVE-2023-2008

    Hoch · CVSS 8.2EPSS 1,01%Korrektur verfügbar

    Kernel: udmabuf: improper validation of array index leading to local privilege escalation

    A flaw was found in the Linux kernel's udmabuf device driver, within a fault handler. This issue occurs due to the lack of proper validation of user-supplied data, which can result in memory access past the end of an array. This may allow an attacker to escalate privileges and execute arbitrary code in the context of the kernel.

    • Auf 5.4.0-126.142 aktualisieren
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  12. CVE-2023-1829

    Hoch · CVSS 7.8EPSS 1,06%Korrektur verfügbar

    Use-after-free in tcindex (traffic control index filter) in the Linux Kernel

    A use-after-free vulnerability in the Linux Kernel traffic control index filter (tcindex) can be exploited to achieve local privilege escalation. The tcindex_delete function which does not properly deactivate filters in case of a perfect hashes while deleting the underlying structure which can later lead to double freeing the structure. A local attacker user can use this vulnerability to elevate its privileges to root. We recommend upgrading past commit 8c710f75256bb3cf05ac7b1672c82b92c43f3d28 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ .

    • Auf 5.4.0-148.165 aktualisieren
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  13. CVE-2023-1989

    Hoch · CVSS 7EPSS 0,44%Korrektur verfügbar

    Kernel: use after free bug in btsdio_remove due to race condition

    A use-after-free flaw was found in btsdio_remove in drivers\bluetooth\btsdio.c in the Linux Kernel. A call to btsdio_remove with an unfinished job may cause a race problem which leads to a UAF on hdev devices.

    • Auf 5.4.0-169.187 aktualisieren
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  14. CVE-2020-11935

    Mittel · CVSS 4.4EPSS 0,2%Korrektur verfügbar

    aufs: improperly managed inode reference counts in the vfsub_dentry_open() method

    It was discovered that aufs improperly managed inode reference counts in the vfsub_dentry_open() method. A local attacker could use this vulnerability to cause a denial of service attack.

    • Auf 5.4.0-42.46 aktualisieren
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