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Fencer Vulns
high 7.8

CVE-2026-52950 json

drm/xe/dma-buf: fix UAF with retry loop

published 2026-06-24 4 mo ago modified 2026-10-19 20 d ago also EUVD-2026-38818

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 7%
public exploits
0
none known

Summary

In the Linux kernel, the following vulnerability has been resolved:

drm/xe/dma-buf: fix UAF with retry loop

Retry doesn't work here, since bo will be freed on error, leading to UAF. However, now that we do the alloc & init before the attach, we can now combine this as one unit and have the init do the alloc for us. This should make the retry safe.

Reported by Sashiko.

v2: Fix up the error unwind (CI)

(cherry picked from commit 479669418253e0f27f8cf5db01a731352ea592e7)

Patch / fix

  • Linux Linux 6.18.33, 7.0.10, 7.1
  • Red Hat Red Hat Enterprise Linux 10 0:6.12.0-211.37.1.el10_2
  • Red Hat Red Hat Enterprise Linux 9 0:5.14.0-687.30.1.el9_8
  • linux Debian 14 7.0.10-1

debian advisories DEBIAN-CVE-2026-52950

  • linux Ubuntu 26.04 LTS 7.0.0-28.28
  • linux-aws Ubuntu 26.04 LTS 7.0.0-1009.9
  • linux-gcp Ubuntu 26.04 LTS 7.0.0-1008.8
  • linux-gke Ubuntu 26.04 LTS 7.0.0-1003.4
  • linux-ibm Ubuntu 26.04 LTS 7.0.0-1010.10
  • linux-azure Ubuntu 26.04 LTS 7.0.0-1010.10
  • linux-raspi Ubuntu 26.04 LTS 7.0.0-1015.15
  • linux-riscv Ubuntu 26.04 LTS 7.0.0-28.28.1

ubuntu advisories UBUNTU-CVE-2026-52950

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel RHEL 9 5.14.0-687.30.1.el9_8
  • rv RHEL 9 5.14.0-687.30.1.el9_8
  • perf RHEL 9 5.14.0-687.30.1.el9_8
  • rtla RHEL 9 5.14.0-687.30.1.el9_8
  • libperf RHEL 9 5.14.0-687.30.1.el9_8
  • kernel-rt RHEL 9 5.14.0-687.30.1.el9_8
  • kernel-64k RHEL 9 5.14.0-687.30.1.el9_8
  • kernel-core RHEL 9 5.14.0-687.30.1.el9_8

red hat advisories RHSA-2026:45192RHSA-2026:42919

  • kernel AlmaLinux 9 5.14.0-687.30.1.el9_8
  • rv AlmaLinux 9 5.14.0-687.30.1.el9_8
  • perf AlmaLinux 9 5.14.0-687.30.1.el9_8
  • rtla AlmaLinux 9 5.14.0-687.30.1.el9_8
  • libperf AlmaLinux 9 5.14.0-687.30.1.el9_8
  • kernel-rt AlmaLinux 9 5.14.0-687.30.1.el9_8
  • kernel-64k AlmaLinux 9 5.14.0-687.30.1.el9_8
  • kernel-core AlmaLinux 9 5.14.0-687.30.1.el9_8

almalinux advisories ALSA-2026:45192ALSA-2026:42919

  • kernel Rocky Linux 9 5.14.0-687.30.1.el9_8.cloud.1.0
  • kernel Rocky Linux 9 5.14.0-687.30.1.el9_8
  • kernel Rocky Linux 10 6.12.0-211.37.1.el10_2

rocky linux advisories RXSA-2026:45192RLSA-2026:45192RLSA-2026:42919

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-52950 updated cvss 7.0

kernel: drm/xe/dma-buf: fix UAF with retry loop

  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.30.1.el9_8, perf 5.14.0-687.30.1.el9_8, rtla 5.14.0-687.30.1.el9_8, python3-perf 5.14.0-687.30.1.el9_8, kernel-devel-matched 5.14.0-687.30.1.el9_8, kernel-64k-devel-matched 5.14.0-687.30.1.el9_8, +7 more
    fixed: vendor fix RHSA-2026:45192
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.37.1.el10_2, perf 6.12.0-211.37.1.el10_2, rtla 6.12.0-211.37.1.el10_2, python3-perf 6.12.0-211.37.1.el10_2, kernel-devel-matched 6.12.0-211.37.1.el10_2, kernel-64k-devel-matched 6.12.0-211.37.1.el10_2, +7 more
    fixed: vendor fix RHSA-2026:42919
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.30.1.el9_8, kernel-64k 5.14.0-687.30.1.el9_8, kernel-core 5.14.0-687.30.1.el9_8, kernel-tools 5.14.0-687.30.1.el9_8, kernel-modules 5.14.0-687.30.1.el9_8, kernel-64k-core 5.14.0-687.30.1.el9_8, +27 more
    fixed: vendor fix RHSA-2026:45192
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.37.1.el10_2, kernel-64k 6.12.0-211.37.1.el10_2, kernel-core 6.12.0-211.37.1.el10_2, kernel-tools 6.12.0-211.37.1.el10_2, kernel-modules 6.12.0-211.37.1.el10_2, kernel-64k-core 6.12.0-211.37.1.el10_2, +28 more
    fixed: vendor fix RHSA-2026:42919
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.30.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.30.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.30.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.30.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.30.1.el9_8
    fixed: vendor fix RHSA-2026:45192
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.37.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.37.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.37.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.37.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.37.1.el10_2
    fixed: vendor fix RHSA-2026:42919
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.30.1.el9_8, kernel-rt-64k 5.14.0-687.30.1.el9_8, kernel-rt-core 5.14.0-687.30.1.el9_8, kernel-rt-modules 5.14.0-687.30.1.el9_8, kernel-rt-64k-core 5.14.0-687.30.1.el9_8, kernel-rt-debug-core 5.14.0-687.30.1.el9_8, +14 more
    fixed: vendor fix RHSA-2026:45192
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.37.1.el10_2, kernel-rt-64k 6.12.0-211.37.1.el10_2, kernel-rt-core 6.12.0-211.37.1.el10_2, kernel-rt-modules 6.12.0-211.37.1.el10_2, kernel-rt-64k-core 6.12.0-211.37.1.el10_2, kernel-rt-debug-core 6.12.0-211.37.1.el10_2, +14 more
    fixed: vendor fix RHSA-2026:42919
show 3 more
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.30.1.el9_8, kernel-rt-core 5.14.0-687.30.1.el9_8, kernel-rt-modules 5.14.0-687.30.1.el9_8, kernel-rt-debug-core 5.14.0-687.30.1.el9_8, kernel-rt-modules-core 5.14.0-687.30.1.el9_8, kernel-rt-debug-modules 5.14.0-687.30.1.el9_8, +4 more
    fixed: vendor fix RHSA-2026:45192
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.37.1.el10_2, kernel-rt-core 6.12.0-211.37.1.el10_2, kernel-rt-modules 6.12.0-211.37.1.el10_2, kernel-rt-debug-core 6.12.0-211.37.1.el10_2, kernel-rt-modules-core 6.12.0-211.37.1.el10_2, kernel-rt-debug-modules 6.12.0-211.37.1.el10_2, +4 more
    fixed: vendor fix RHSA-2026:42919
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
24 d ago

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA ADP 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Linux
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.