VulnerabilityPublished 8 May 2026Updated 6 Nov 2026

CVE-2026-43396: Linux kernel · drm/xe/sync: Fix user fence leak on alloc failure

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in f8f90b33934b307f6e4599b9fae38aa1ee5441a7 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 15:49 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in f8f90b33934b307f6e4599b9fae38aa1ee5441a7, 0879c3f04f67e2a1677c25dcc24669ce21eb6a6c, 05edc78eb4699e8e000a62aaa8dace50a17e19e3

Exploitation evidence

Disclosed: evidence found.
CVE published 8 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to f8f90b33934b307f6e4599b9fae38aa1ee5441a7, 0879c3f04f67e2a1677c25dcc24669ce21eb6a6c or 05edc78eb4699e8e000a62aaa8dace50a17e19e3.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 0995c2fc39b0f998d40f5d276f67ae22fc1c37c3, < f8f90b33934b307f6e4599b9fae38aa1ee5441a7	Fixed in f8f90b33934b307f6e4599b9fae38aa1ee5441a7
LinuxLinux	Affected ≥ 0995c2fc39b0f998d40f5d276f67ae22fc1c37c3, < 0879c3f04f67e2a1677c25dcc24669ce21eb6a6c	Fixed in 0879c3f04f67e2a1677c25dcc24669ce21eb6a6c
LinuxLinux	Affected ≥ 0995c2fc39b0f998d40f5d276f67ae22fc1c37c3, < 05edc78eb4699e8e000a62aaa8dace50a17e19e3	Fixed in 05edc78eb4699e8e000a62aaa8dace50a17e19e3
LinuxLinux	Affected =6.18	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: drm/xe/sync: Fix user fence leak on alloc failure When dma_fence_chain_alloc() fails, properly release the user fence reference to prevent a memory leak. (cherry picked from commit a5d5634cde48a9fcd68c8504aa07f89f175074a0)

References

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