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Back to active CVEs
Unknown severity · Source severity not reportedCVE-2026-98288

net: stmmac: fix TSO header length truncationCVE-2026-98288

Answer in brief

CVE-2026-98288 records a Unknown severity vulnerability in net: stmmac: fix TSO header length truncation. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 6, 2026Updated Oct 6, 2026Source checked Oct 6, 2026First seen by HOL Oct 6, 2026Material review Oct 6, 2026
Upstream Advisory

Key facts

Risk
Unknown severitySource severity not reported
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=9edfa7dab8112a012b349b7937f5444fdc21e8f9 <bcf6013c2b4d732c6e4bf4d0f6ae4a18d63d414b || >=9edfa7dab8112a012b349b7937f5444fdc21e8f9 <15989abd74f16f44bf953d056b95f1d2fda9b0cdbcf6013c2b4d732c6e4bf4d0f6ae4a18d63d414b, 15989abd74f16f44bf953d056b95f1d2fda9b0cd
Linux/Linuxgeneric4.13Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to bcf6013c2b4d732c6e4bf4d0f6ae4a18d63d414b if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 6, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: fix TSO header length truncation stmmac_tso_xmit() stores the protocol header length returned by stmmac_tso_header_size() in a u8. stmmac_tso_valid_packet() admits headers up to 1023 bytes, so a header longer than 255 bytes wraps modulo 256 (486 becomes 230, 256 becomes 0). A TCP over IPv6 socket carrying a few hundred bytes of sticky destination/hop-by-hop options makes skb_tcp_all_headers() exceed 255 while staying below the 1023-byte limit, so such an skb reaches stmmac_tso_xmit(). Widen proto_hdr_len to unsigned int, which is sufficient since the value is bounded by the hardware limit, and adjust the debug print specifier accordingly.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • wifi: cfg80211: get the wiphy out of a dying network namespaceSame linux/linux package
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  • wifi: mac80211: only operate on TDLS peers in the TDLS codeSame linux/linux package
  • wifi: mac80211: reset the LED state when ifup failsSame linux/linux package
  • wifi: mac80211: reset state when starting AP failsSame linux/linux package
  • wifi: mac80211: abort chanswitch when leaving a meshSame linux/linux package

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Oct 6, 2026
References
2 linked sources
Open source record