CVE-2026-98095: Linux kernel · af_packet: Don't cast tpacket_hdr.tp_len to int in tpacket_parse_header().
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 17:16 UTC
Rated by Threat Radar · 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.
Exploitation evidence
Disclosed: evidence found.
CVE published 25 Sep 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.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
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 as the vulnerability has been resolved in the Linux kernel. Users should update to patched kernel versions that address this issue. Since no vendor advisory or patch links are provided, verify with the Linux kernel maintainers or distribution vendors for the appropriate fixed versions.
Description
A vulnerability in the Linux kernel's af_packet subsystem was resolved, involving improper casting of the tpacket_hdr.tp_len field from u32 to int in the tpacket_parse_header() function. This casting error could cause negative values to be returned, leading to a kernel BUG() in sock_sendmsg_nosec(). The issue was identified by syzbot and results from tp_len values larger than INT_MAX being misinterpreted. The vulnerability affects specific Linux kernel versions listed and can cause kernel crashes.
References
- ubuntu.com/security/CVE-2026-98095 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-98095 (opens in a new tab)
- git.kernel.org/stable/c/9d714076ff398ba8cc5ae0ae146f4a1ea0bbf5e8 (opens in a new tab)
- git.kernel.org/stable/c/c6b3db727876a027013aa4ccb6913a153a2af41a (opens in a new tab)
- git.kernel.org/stable/c/72abe77e88c3f1f71c5348124e9b28e285f26950 (opens in a new tab)
- git.kernel.org/stable/c/73e594c19b4f815d8343461cec7074c4713bbde7 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-98095 (opens in a new tab)
- git.kernel.org/stable/c/09e3c9b32434600a6992e762bf0d6837f5902134 (opens in a new tab)
- git.kernel.org/stable/c/2b9fa12fbdbfc0f671ff23b0ea06c177a6b8a6b8 (opens in a new tab)
- git.kernel.org/stable/c/3e0cad1432a0c0564f5076bab16f1aa4c0474be4 (opens in a new tab)
- git.kernel.org/stable/c/6d4d55f75fa0ea32d874eb33e356e9361f3e4591 (opens in a new tab)