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VulnerabilityPublished Updated

CVE-2026-98095: Linux kernel · af_packet: Don't cast tpacket_hdr.tp_len to int in tpacket_parse_header().

Affects Linux kernelSource CVE Database V5

0

Not known to be exploited · fixed in c6b3db727876a027013aa4ccb6913a153a2af41a : patch Linux kernel soon.

Data as of 26 Oct 2026, 14:05 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 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in c6b3db727876a027013aa4ccb6913a153a2af41a, 73e594c19b4f815d8343461cec7074c4713bbde7, 72abe77e88c3f1f71c5348124e9b28e285f26950 +5

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 25 Sep 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
  • ≥ 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1, < c6b3db727876a027013aa4ccb6913a153a2af41a
Fixed in
  • c6b3db727876a027013aa4ccb6913a153a2af41a
LinuxLinuxAffected
  • ≥ 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1, < 73e594c19b4f815d8343461cec7074c4713bbde7
Fixed in
  • 73e594c19b4f815d8343461cec7074c4713bbde7
LinuxLinuxAffected
  • ≥ 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1, < 72abe77e88c3f1f71c5348124e9b28e285f26950
Fixed in
  • 72abe77e88c3f1f71c5348124e9b28e285f26950
LinuxLinuxAffected
  • ≥ 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1, < 09e3c9b32434600a6992e762bf0d6837f5902134
Fixed in
  • 09e3c9b32434600a6992e762bf0d6837f5902134
LinuxLinuxAffected
  • ≥ 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1, < 9d714076ff398ba8cc5ae0ae146f4a1ea0bbf5e8
Fixed in
  • 9d714076ff398ba8cc5ae0ae146f4a1ea0bbf5e8
LinuxLinuxAffected
  • ≥ 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1, < 6d4d55f75fa0ea32d874eb33e356e9361f3e4591
Fixed in
  • 6d4d55f75fa0ea32d874eb33e356e9361f3e4591

AI-suggested

A fix for this vulnerability has been implemented in the Linux kernel. Users should update to a kernel version that includes the relevant patches identified by the fixed commit hashes. No additional mitigation steps are indicated.

Description

A vulnerability in the Linux kernel's af_packet subsystem involves improper casting of the tpacket_hdr.tp_len field from u32 to int in the tpacket_parse_header() function. This can cause incorrect length checks and lead to negative values being returned, triggering a kernel BUG in sock_sendmsg_nosec(). The issue was reported by syzbot and fixed in subsequent kernel commits.

References

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