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VulnerabilityPublished Updated

CVE-2026-98196: Linux kernel · wifi: brcmsmac: fix UAF in brcms_free_timer()

Affects Linux kernelSource CVE Database V5

0

Not known to be exploited · fixed in 856dabd5f2617efb23c043be9e1b22a9e6e97c41 : patch Linux kernel soon.

Data as of 26 Oct 2026, 13:47 UTC

Severity
High

Rated High 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 856dabd5f2617efb23c043be9e1b22a9e6e97c41, 777cb6bba59e875b16a1d8897a483a5fecfcd5d2, 74acccc928851f69184271832d690607877122af +5

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 6 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
  • ≥ 5b435de0d786869c95d1962121af0d7df2542009, < 856dabd5f2617efb23c043be9e1b22a9e6e97c41
Fixed in
  • 856dabd5f2617efb23c043be9e1b22a9e6e97c41
LinuxLinuxAffected
  • ≥ 5b435de0d786869c95d1962121af0d7df2542009, < 777cb6bba59e875b16a1d8897a483a5fecfcd5d2
Fixed in
  • 777cb6bba59e875b16a1d8897a483a5fecfcd5d2
LinuxLinuxAffected
  • ≥ 5b435de0d786869c95d1962121af0d7df2542009, < 74acccc928851f69184271832d690607877122af
Fixed in
  • 74acccc928851f69184271832d690607877122af
LinuxLinuxAffected
  • ≥ 5b435de0d786869c95d1962121af0d7df2542009, < 050d2486e8ed2c0a23b87249ccd23e8072721391
Fixed in
  • 050d2486e8ed2c0a23b87249ccd23e8072721391
LinuxLinuxAffected
  • ≥ 5b435de0d786869c95d1962121af0d7df2542009, < 10eeb0b29fd7f52487c9ae573e8d79c210a0095d
Fixed in
  • 10eeb0b29fd7f52487c9ae573e8d79c210a0095d
LinuxLinuxAffected
  • ≥ 5b435de0d786869c95d1962121af0d7df2542009, < 2a4841ff0b74b495cddd31ae324e922217fc2f13
Fixed in
  • 2a4841ff0b74b495cddd31ae324e922217fc2f13

AI-suggested

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

Description

A use-after-free (UAF) vulnerability in the Linux kernel's brcmsmac WiFi driver was fixed by ensuring that any in-flight timer callbacks complete before freeing the timer structure. The flaw involved improper synchronization when canceling delayed work, potentially leading to memory corruption.

References

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