CVE-2026-45940net: stmmac: fix oops when split header is enabled
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Undergoing Analysis
- Record last updated
- Oct 21, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from ec222003bd948de8f3ffbca522d328af1a8452ad before 107e169f963920b11fa3c1bb384c077fe7330696; from ec222003bd948de8f3ffbca522d328af1a8452ad before 92b45c99311ac4f3857cccee47059c4fb067fd4d; from ec222003bd948de8f3ffbca522d328af1a8452ad before b1f23df09e7dbf4c86b6908dff7efb8cb2b7d609; from ec222003bd948de8f3ffbca522d328af1a8452ad before 36f81cb7d82e9614a7058da6abdf2e3a03993df1; from ec222003bd948de8f3ffbca522d328af1a8452ad before babab1b42ed68877ef669a08384becf281ad2582 | CNA record |
linux linux_kernel linux:linux_kernel | from 5.4 before 6.18.14; from 6.19 before 6.19.4 | NVD |
References
- https://git.kernel.org/stable/c/107e169f963920b11fa3c1bb384c077fe7330696
- https://git.kernel.org/stable/c/92b45c99311ac4f3857cccee47059c4fb067fd4d
- https://git.kernel.org/stable/c/b1f23df09e7dbf4c86b6908dff7efb8cb2b7d609patch
- https://git.kernel.org/stable/c/36f81cb7d82e9614a7058da6abdf2e3a03993df1patch
- https://git.kernel.org/stable/c/babab1b42ed68877ef669a08384becf281ad2582patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.