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Back to active CVEs
Medium · CVSS 5.5CVE-2026-45940

net: stmmac: fix oops when split header is enabledCVE-2026-45940

Answer in brief

CVE-2026-45940 records a Medium severity (CVSS 5.5) vulnerability in net: stmmac: fix oops when split header is enabled. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), 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 May 27, 2026Updated Oct 30, 2026Source checked Nov 4, 2026First seen by HOL Jun 24, 2026Material review Oct 30, 2026
Upstream Advisory

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
NVD-CWE-noinfo
Source
CVE List V5
Source checked
Nov 4, 2026
References
6 linked sources
Open source record

Key facts

Risk
Medium · CVSS 5.5
Exploitation
Not marked as known exploited
Affected software
5 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 5.5. 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), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric5.4Not reported
Linux/Linuxgeneric>=ec222003bd948de8f3ffbca522d328af1a8452ad <b1f23df09e7dbf4c86b6908dff7efb8cb2b7d609 || >=ec222003bd948de8f3ffbca522d328af1a8452ad <36f81cb7d82e9614a7058da6abdf2e3a03993df1 || >=ec222003bd948de8f3ffbca522d328af1a8452ad <babab1b42ed68877ef669a08384becf281ad2582b1f23df09e7dbf4c86b6908dff7efb8cb2b7d609, 36f81cb7d82e9614a7058da6abdf2e3a03993df1, babab1b42ed68877ef669a08384becf281ad2582
Linux/Linuxgeneric>=ec222003bd948de8f3ffbca522d328af1a8452ad <107e169f963920b11fa3c1bb384c077fe7330696 || >=ec222003bd948de8f3ffbca522d328af1a8452ad <92b45c99311ac4f3857cccee47059c4fb067fd4d || >=ec222003bd948de8f3ffbca522d328af1a8452ad <b1f23df09e7dbf4c86b6908dff7efb8cb2b7d609 || >=ec222003bd948de8f3ffbca522d328af1a8452ad <36f81cb7d82e9614a7058da6abdf2e3a03993df1 || >=ec222003bd948de8f3ffbca522d328af1a8452ad <babab1b42ed68877ef669a08384becf281ad2582107e169f963920b11fa3c1bb384c077fe7330696, 92b45c99311ac4f3857cccee47059c4fb067fd4d, b1f23df09e7dbf4c86b6908dff7efb8cb2b7d609, 36f81cb7d82e9614a7058da6abdf2e3a03993df1, babab1b42ed68877ef669a08384becf281ad2582
Linux/Linuxgeneric>=ec222003bd948de8f3ffbca522d328af1a8452ad <a7fe1d75e087862bc4087f3fcdfd5e291b9d9caa || >=ec222003bd948de8f3ffbca522d328af1a8452ad <107e169f963920b11fa3c1bb384c077fe7330696 || >=ec222003bd948de8f3ffbca522d328af1a8452ad <92b45c99311ac4f3857cccee47059c4fb067fd4d || >=ec222003bd948de8f3ffbca522d328af1a8452ad <b1f23df09e7dbf4c86b6908dff7efb8cb2b7d609 || >=ec222003bd948de8f3ffbca522d328af1a8452ad <36f81cb7d82e9614a7058da6abdf2e3a03993df1 || >=ec222003bd948de8f3ffbca522d328af1a8452ad <babab1b42ed68877ef669a08384becf281ad2582a7fe1d75e087862bc4087f3fcdfd5e291b9d9caa, 107e169f963920b11fa3c1bb384c077fe7330696, 92b45c99311ac4f3857cccee47059c4fb067fd4d, b1f23df09e7dbf4c86b6908dff7efb8cb2b7d609, 36f81cb7d82e9614a7058da6abdf2e3a03993df1, babab1b42ed68877ef669a08384becf281ad2582

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to b1f23df09e7dbf4c86b6908dff7efb8cb2b7d609; Linux/Linux to 107e169f963920b11fa3c1bb384c077fe7330696; Linux/Linux to a7fe1d75e087862bc4087f3fcdfd5e291b9d9caa if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    May 27, 2026

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

  2. Source modified

    Oct 30, 2026

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

  3. First seen by HOL

    Jun 24, 2026

Sources and claim methodology

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

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: fix oops when split header is enabled For GMAC4, when split header is enabled, in some rare cases, the hardware does not fill buf2 of the first descriptor with payload. Thus we cannot assume buf2 is always fully filled if it is not the last descriptor. Otherwise, the length of buf2 of the second descriptor will be calculated wrong and cause an oops: Unable to handle kernel paging request at virtual address ffff00019246bfc0 ... x2 : 0000000000000040 x1 : ffff00019246bfc0 x0 : ffff00009246c000 Call trace: dcache_inval_poc+0x28/0x58 (P) dma_direct_sync_single_for_cpu+0x38/0x6c __dma_sync_single_for_cpu+0x34/0x6c stmmac_napi_poll_rx+0x8f0/0xb60 __napi_poll.constprop.0+0x30/0x144 net_rx_action+0x160/0x274 handle_softirqs+0x1b8/0x1fc ... To fix this, the PL bit-field in RDES3 register is used for all descriptors, whether it is the last descriptor or not.

Quoted source text, attributed separately from HOL analysis.