VulnerabilityPublished 28 Oct 2026

CVE-2026-99100: Linux kernel · wifi: p54: validate firmware record lengths

Source GCVE Database

Authoritative record:CVE-2026-99100· Medium

Not known to be exploited · fixed in f641066b0ddcd1b0cf007c0d04f9c966f6e888ae : update Linux kernel when convenient.

Data as of 28 Oct 2026, 07:29 UTC

Severity

Medium

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

Patch: Available – fixed in f641066b0ddcd1b0cf007c0d04f9c966f6e888ae, db7b86bd97b380ece8fa39cfdd7502a9fd35e56f, 8c4f962f368d5e17481f3c2c5a43028953e137a5 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 28 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 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.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, 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.

ghsa-m5mp-q9hj-5q22

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected <6.18.59 <7.2.13	Fixed in f641066b0ddcd1b0cf007c0d04f9c966f6e888ae db7b86bd97b380ece8fa39cfdd7502a9fd35e56f 8c4f962f368d5e17481f3c2c5a43028953e137a5 7.2.13 6.18.59

AI-suggested

A fix has been implemented that validates firmware record lengths before accessing their data, rejecting malformed descriptors that could cause out-of-bounds reads. Users should apply the updated Linux kernel version containing this fix once available.

Description

A vulnerability in the Linux kernel's p54 wifi firmware parser allows reading beyond the intended record boundaries due to insufficient validation of firmware record lengths. This flaw could lead to improper memory access when parsing malformed firmware records. The issue has been addressed by adding validation checks on component ID and version record lengths and descriptor records to prevent out-of-bounds reads.

References

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