VulnerabilityPublished 6 Oct 2026Updated 19 Oct 2026

CVE-2026-98187: Linux kernel · wifi: p54: require a full exp_if record in PDR_INTERFACE_LIST

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in d82492fd0a3fb61963c236521852763238ad3898 : 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 d82492fd0a3fb61963c236521852763238ad3898, d44c1badc2dcb042985f7e37f4c448c84548b81f, d8efd84f49379ed28624098821f80e992657d935 +5

Exploitation evidence

Disclosed: evidence found.
CVE published 6 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.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ eff1a59c48e3c6a006eb4fe5f2e405a996f2259d, < d82492fd0a3fb61963c236521852763238ad3898	Fixed in d82492fd0a3fb61963c236521852763238ad3898
LinuxLinux	Affected ≥ eff1a59c48e3c6a006eb4fe5f2e405a996f2259d, < d44c1badc2dcb042985f7e37f4c448c84548b81f	Fixed in d44c1badc2dcb042985f7e37f4c448c84548b81f
LinuxLinux	Affected ≥ eff1a59c48e3c6a006eb4fe5f2e405a996f2259d, < d8efd84f49379ed28624098821f80e992657d935	Fixed in d8efd84f49379ed28624098821f80e992657d935
LinuxLinux	Affected ≥ eff1a59c48e3c6a006eb4fe5f2e405a996f2259d, < d2fb6b588dc5bbab4f603661e41cd60f0d931628	Fixed in d2fb6b588dc5bbab4f603661e41cd60f0d931628
LinuxLinux	Affected ≥ eff1a59c48e3c6a006eb4fe5f2e405a996f2259d, < bc83c04be042f53869c315b8e1eb5f124959d1d7	Fixed in bc83c04be042f53869c315b8e1eb5f124959d1d7
LinuxLinux	Affected ≥ eff1a59c48e3c6a006eb4fe5f2e405a996f2259d, < 487f966421014de41e835bbce3feb30b35f4f729	Fixed in 487f966421014de41e835bbce3feb30b35f4f729

AI-suggested

This issue has been fixed in multiple Linux kernel commits as listed in the established facts. Users should update to a Linux kernel version that includes these fixes. No additional mitigation is required once patched.

Description

A vulnerability in the Linux kernel's wifi p54 driver involves improper validation of exp_if records in the PDR_INTERFACE_LIST. The code reads an entire exp_if structure without ensuring the full record fits within the entry, leading to out-of-bounds reads beyond the EEPROM buffer. This can cause information leakage and potentially affect front-end selection logic.

Impact

This vulnerability can cause out-of-bounds reads from kernel memory, potentially leaking sensitive information. Additionally, because the variant field affects front-end selection, it may lead to incorrect hardware behavior or instability. There is no evidence of active exploitation in the wild.

Summary

The Linux kernel wifi p54 driver had a flaw where the PDR_INTERFACE_LIST loop only checked that the start of a record was within bounds before reading a full exp_if struct. If the trailing record was truncated, reading fields like if_id and variant could cross the entry boundary into heap memory beyond the EEPROM buffer. This was confirmed using a KASAN reproducer. The variant field influences synth front-end selection, indicating the issue is more than just an information leak. The fix requires advancing the pointer only when a full record fits in the entry.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Oct 2026, 12:26 UTC

Technical details

References

Community reviews

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