CVE-2026-74495igbvf: Fix leak in TX DMA error cleanup
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: igbvf: Fix leak in TX DMA error cleanup If an error is encountered while mapping TX buffers, the driver should unmap any buffers already mapped for that skb. Because count is incremented before each frag mapping, it will always match the correct number of unmappings needed when dma_error is reached. Decrementing count before the while loop in dma_error causes an off-by-one error. If any mapping was successful before an unsuccessful mapping, exactly one DMA mapping (the head) would leak. This bug was introduced by a 2010 fix for an endless loop in dma_error. All other affected drivers have already been fixed.
- CVSS
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from c1fa347f20f17f14a4a1575727fa24340e8a9117 before e42b7225c45f57b42306b80cdd3bda202bae7293; from c1fa347f20f17f14a4a1575727fa24340e8a9117 before e3ed89c257f6361f13df23023cd10ace830330ad; from c1fa347f20f17f14a4a1575727fa24340e8a9117 before 56726ff12cb6759ab90d6f5332c2377aeca7d249; from c1fa347f20f17f14a4a1575727fa24340e8a9117 before 31089f4eab42e0fc248ec80c26f9b0bad59ba4cc; from c1fa347f20f17f14a4a1575727fa24340e8a9117 before bc25d56c03e41c10bc4b40e99ca5d7b941675c04; from c1fa347f20f17f14a4a1575727fa24340e8a9117 before 845a9cdd9b03b7b6fa8de3ee80579780350a7f65; from c1fa347f20f17f14a4a1575727fa24340e8a9117 before df07003b5a6c6c9fce60d765d6a3da815a74c41c; from c1fa347f20f17f14a4a1575727fa24340e8a9117 before 0565052b7e2f436b7f1541f4849da96dc0aa7a0e | CNA record |
References
- https://git.kernel.org/stable/c/e42b7225c45f57b42306b80cdd3bda202bae7293
- https://git.kernel.org/stable/c/e3ed89c257f6361f13df23023cd10ace830330ad
- https://git.kernel.org/stable/c/56726ff12cb6759ab90d6f5332c2377aeca7d249
- https://git.kernel.org/stable/c/31089f4eab42e0fc248ec80c26f9b0bad59ba4cc
- https://git.kernel.org/stable/c/bc25d56c03e41c10bc4b40e99ca5d7b941675c04
- https://git.kernel.org/stable/c/845a9cdd9b03b7b6fa8de3ee80579780350a7f65
- https://git.kernel.org/stable/c/df07003b5a6c6c9fce60d765d6a3da815a74c41c
- https://git.kernel.org/stable/c/0565052b7e2f436b7f1541f4849da96dc0aa7a0e
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.