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VulnerabilityPublished

CVE-2026-98623: Linux kernel · drm/nouveau/clk: fix list cursor use after loop in nvkm_clk_ustate_update

Affects Linux kernelSource CVE Database V5

0

Not known to be exploited · fixed in db5dd9f47b4df1be322f498d846e9a82940a7390 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:05 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD

EPSS
0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in db5dd9f47b4df1be322f498d846e9a82940a7390, aff09d9e37e02dc60bde79035ac15b136d602259, a867abcfa85ab487066c3d3008a1ba905da04113 +5

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 18 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 26 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 7c856522069755ab9d163a24ac332cd3cb35fe30, < db5dd9f47b4df1be322f498d846e9a82940a7390
Fixed in
  • db5dd9f47b4df1be322f498d846e9a82940a7390
LinuxLinuxAffected
  • ≥ 7c856522069755ab9d163a24ac332cd3cb35fe30, < aff09d9e37e02dc60bde79035ac15b136d602259
Fixed in
  • aff09d9e37e02dc60bde79035ac15b136d602259
LinuxLinuxAffected
  • ≥ 7c856522069755ab9d163a24ac332cd3cb35fe30, < a867abcfa85ab487066c3d3008a1ba905da04113
Fixed in
  • a867abcfa85ab487066c3d3008a1ba905da04113
LinuxLinuxAffected
  • ≥ 7c856522069755ab9d163a24ac332cd3cb35fe30, < 391517da7fd54ae40e4a7fe1cc696217343b0061
Fixed in
  • 391517da7fd54ae40e4a7fe1cc696217343b0061
LinuxLinuxAffected
  • ≥ 7c856522069755ab9d163a24ac332cd3cb35fe30, < 5315c7bacfe274ddfe649d9556e9a341ffa812da
Fixed in
  • 5315c7bacfe274ddfe649d9556e9a341ffa812da
LinuxLinuxAffected
  • ≥ 7c856522069755ab9d163a24ac332cd3cb35fe30, < 492e9cfa12f35f7946ea1b78a19f1f9337d62248
Fixed in
  • 492e9cfa12f35f7946ea1b78a19f1f9337d62248

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available and has been applied in multiple Linux kernel commits. Users should update their Linux kernel to a version including these fixes to remediate the vulnerability.

Description

A use-after-loop vulnerability in the Linux kernel's drm/nouveau/clk component was fixed. The issue arises when the function nvkm_clk_ustate_update uses a list cursor incorrectly if the loop exits without a break, leading to an invalid pointer dereference. This can be triggered from userspace via the 'pstate' debugfs file by requesting an invalid pstate id, causing an out-of-bounds read.

References

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