Vulnérabilités de qemu

UBUNTU-CVE-2026-66020

[virtio-gpu: disable blob scanouts on mapping cleanup]

UBUNTU-CVE-2026-84788

[io/channel-socket: do not treat a zero length write as an error]

UBUNTU-CVE-2026-77913

[hw/display/vga: fix text-mode OOB write after a graphics surface switch]

UBUNTU-CVE-2026-66900

[hw/net/virtio-net: strip trailing padding when caching RSC segment]

UBUNTU-CVE-2026-66899

[virtio-balloon: fix free-page BH teardown on unrealize]

UBUNTU-CVE-2026-17588

[hw/usb/hcd-xhci: Set reentrancy guard in timer functions]

UBUNTU-CVE-2026-16271

[hw/display/qxl: validate primary surface stride against width]

Qemu-kvm: 9pfs: use-after-free race in tlcreate/twalk allows vm guest escape

A use-after-free vulnerability was found in QEMU's 9pfs subsystem. A race condition between the main thread and a worker thread when processing concurrent Tlcreate and Twalk requests allows a malicious guest user to craft a fid path containing stale heap data, bypassing directory traversal restrictions and escaping the shared directory boundary. This can lead to arbitrary host file read/write and code execution (VM escape) as the QEMU process user.

Qemu-kvm: vapic writable rom alias can escape the option-rom window and expose locked smram

A flaw was found in QEMU. The VAPIC setup hypercall in hw/i386/vapic.c does not validate that the writable RAM alias remains within the option ROM window. A privileged guest user on a Q35/KVM machine can position this alias over locked SMRAM, bypassing chipset D_LCK protection and injecting code into System Management Mode memory.

UBUNTU-CVE-2026-66022

hw/net/virtio-net: Protect from DMA re-entrancy bugs

• Mettez à jour vers 1:10.0.13+ds-0+deb13u1

UBUNTU-CVE-2026-65929

dmg: fix out-of-bounds load in search_chunk()

• Mettez à jour vers 1:10.0.13+ds-0+deb13u1

UBUNTU-CVE-2026-65928

dmg: reject inconsistent UDRW chunk sector count and length

• Mettez à jour vers 1:10.0.13+ds-0+deb13u1

UBUNTU-CVE-2026-63323

virtio-pmem: wait for flush requests on unrealize

• Mettez à jour vers 1:10.0.13+ds-0+deb13u1

UBUNTU-CVE-2026-63322

hw/display/qxl: unregister vm_change_state handler and BHs

• Mettez à jour vers 1:10.0.13+ds-0+deb13u1

UBUNTU-CVE-2026-63321

virtio-net: fix OOB read in RSC receive path

• Mettez à jour vers 1:10.0.13+ds-0+deb13u1

UBUNTU-CVE-2026-63320

virtio-net: fix short frame OOB read in receive_filter()

• Mettez à jour vers 1:10.0.13+ds-0+deb13u1

UBUNTU-CVE-2026-63110

libvhost-user: fix heap overflow in vu_check_queue_inflights

• Mettez à jour vers 1:10.0.13+ds-0+deb13u1

UBUNTU-CVE-2026-63109

hw/display/virtio-gpu: validate stride against width on scanout

• Mettez à jour vers 1:10.0.13+ds-0+deb13u1

UBUNTU-CVE-2026-61476

virtio-scsi: fix SCSIRequest leak on a bad request

• Mettez à jour vers 1:10.0.13+ds-0+deb13u1

UBUNTU-CVE-2026-61406

hw/uefi: check lower limit for signature list size

• Mettez à jour vers 1:10.0.13+ds-0+deb13u1