CVE-2026-98288: Linux kernel · net: stmmac: fix TSO header length truncation
Affects Linux kernelSource CVE Database V5
Not known to be exploited : upgrade to bcf6013c2b4d732c6e4bf4d0f6ae4a18d63d414b or 15989abd74f16f44bf953d056b95f1d2fda9b0cd when convenient.
Data as of 26 Oct 2026, 13:47 UTC
Rated Low by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in bcf6013c2b4d732c6e4bf4d0f6ae4a18d63d414b, 15989abd74f16f44bf953d056b95f1d2fda9b0cd
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.
What to do
Upgrade Linux kernel to bcf6013c2b4d732c6e4bf4d0f6ae4a18d63d414b or 15989abd74f16f44bf953d056b95f1d2fda9b0cd.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix is available in the Linux kernel as identified by the fixed commit hashes. Users should update to a kernel version that includes these commits to resolve the issue. No additional mitigation steps are indicated by the vendor.
Description
A vulnerability in the Linux kernel's stmmac network driver causes truncation of the TCP segmentation offload (TSO) header length due to storing the header length in an 8-bit unsigned integer. This leads to incorrect handling of TCP over IPv6 packets with large headers containing sticky destination or hop-by-hop options. The issue is fixed by widening the header length variable to an unsigned int to properly accommodate header sizes up to the hardware limit.