igbvf: Fix leak in TX DMA error cleanup

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74495
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 13:17:54 UTC
Updated2026-08-19 17:21:06 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.004570000 probability, percentile 0.380590000 (date 2026-08-19)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected c1fa347f20f17f14a4a1575727fa24340e8a9117 e42b7225c45f57b42306b80cdd3bda202bae7293 git Not specified
CNA Linux Linux affected c1fa347f20f17f14a4a1575727fa24340e8a9117 e3ed89c257f6361f13df23023cd10ace830330ad git Not specified
CNA Linux Linux affected c1fa347f20f17f14a4a1575727fa24340e8a9117 56726ff12cb6759ab90d6f5332c2377aeca7d249 git Not specified
CNA Linux Linux affected c1fa347f20f17f14a4a1575727fa24340e8a9117 31089f4eab42e0fc248ec80c26f9b0bad59ba4cc git Not specified
CNA Linux Linux affected c1fa347f20f17f14a4a1575727fa24340e8a9117 bc25d56c03e41c10bc4b40e99ca5d7b941675c04 git Not specified
CNA Linux Linux affected c1fa347f20f17f14a4a1575727fa24340e8a9117 845a9cdd9b03b7b6fa8de3ee80579780350a7f65 git Not specified
CNA Linux Linux affected c1fa347f20f17f14a4a1575727fa24340e8a9117 df07003b5a6c6c9fce60d765d6a3da815a74c41c git Not specified
CNA Linux Linux affected c1fa347f20f17f14a4a1575727fa24340e8a9117 0565052b7e2f436b7f1541f4849da96dc0aa7a0e git Not specified
CNA Linux Linux affected 2.6.33 Not specified
CNA Linux Linux unaffected 2.6.33 semver Not specified
CNA Linux Linux unaffected 5.10.265 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.216 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.183 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.151 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.103 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.44 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.8 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/df07003b5a6c6c9fce60d765d6a3da815a74c41c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/845a9cdd9b03b7b6fa8de3ee80579780350a7f65 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e3ed89c257f6361f13df23023cd10ace830330ad 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0565052b7e2f436b7f1541f4849da96dc0aa7a0e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bc25d56c03e41c10bc4b40e99ca5d7b941675c04 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/31089f4eab42e0fc248ec80c26f9b0bad59ba4cc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e42b7225c45f57b42306b80cdd3bda202bae7293 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/56726ff12cb6759ab90d6f5332c2377aeca7d249 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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