CVE-2026-74495

igbvf: Fix leak in TX DMA error cleanup

State: Published
Severity: 9.8 Critical
Published: Aug 15, 2026
Updated: Oct 16, 2026
Reserved: Aug 15, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	c1fa347f20f17f14a4a1575727fa24340e8a9117 to before e42b7225c45f57b42306b80cdd3bda202bae7293Affected c1fa347f20f17f14a4a1575727fa24340e8a9117 to before e3ed89c257f6361f13df23023cd10ace830330adAffected c1fa347f20f17f14a4a1575727fa24340e8a9117 to before 56726ff12cb6759ab90d6f5332c2377aeca7d249Affected c1fa347f20f17f14a4a1575727fa24340e8a9117 to before 31089f4eab42e0fc248ec80c26f9b0bad59ba4ccAffected c1fa347f20f17f14a4a1575727fa24340e8a9117 to before bc25d56c03e41c10bc4b40e99ca5d7b941675c04Affected c1fa347f20f17f14a4a1575727fa24340e8a9117 to before 845a9cdd9b03b7b6fa8de3ee80579780350a7f65Affected c1fa347f20f17f14a4a1575727fa24340e8a9117 to before df07003b5a6c6c9fce60d765d6a3da815a74c41cAffected c1fa347f20f17f14a4a1575727fa24340e8a9117 to before 0565052b7e2f436b7f1541f4849da96dc0aa7a0eAffected
LinuxLinux	2.6.33Affected before 2.6.33Not affected 5.10.265 through 5.10.Not affected 5.15.216 through 5.15.Not affected 6.1.183 through 6.1.Not affected 6.6.151 through 6.6.Not affected 6.12.103 through 6.12.Not affected 6.18.44 through 6.18.Not affected 7.1.8 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

c1fa347f20f17f14a4a1575727fa24340e8a9117 to before e42b7225c45f57b42306b80cdd3bda202bae7293Affected
c1fa347f20f17f14a4a1575727fa24340e8a9117 to before e3ed89c257f6361f13df23023cd10ace830330adAffected
c1fa347f20f17f14a4a1575727fa24340e8a9117 to before 56726ff12cb6759ab90d6f5332c2377aeca7d249Affected
c1fa347f20f17f14a4a1575727fa24340e8a9117 to before 31089f4eab42e0fc248ec80c26f9b0bad59ba4ccAffected
c1fa347f20f17f14a4a1575727fa24340e8a9117 to before bc25d56c03e41c10bc4b40e99ca5d7b941675c04Affected
c1fa347f20f17f14a4a1575727fa24340e8a9117 to before 845a9cdd9b03b7b6fa8de3ee80579780350a7f65Affected
c1fa347f20f17f14a4a1575727fa24340e8a9117 to before df07003b5a6c6c9fce60d765d6a3da815a74c41cAffected
c1fa347f20f17f14a4a1575727fa24340e8a9117 to before 0565052b7e2f436b7f1541f4849da96dc0aa7a0eAffected

LinuxLinux

2.6.33Affected
before 2.6.33Not affected
5.10.265 through 5.10.*Not affected
5.15.216 through 5.15.*Not affected
6.1.183 through 6.1.*Not affected
6.6.151 through 6.6.*Not affected
6.12.103 through 6.12.*Not affected
6.18.44 through 6.18.*Not affected
7.1.8 through 7.1.*Not affected
7.2 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.