mlx5: fix skb leak while fifo resync and push

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2023-54238
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-12-30 13:16:12 UTC
Updated2026-08-04 11:16:38 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: mlx5: fix skb leak while fifo resync and push During ptp resync operation SKBs were poped from the fifo but were never freed neither by napi_consume nor by dev_kfree_skb_any. Add call to napi_consume_skb to properly free SKBs. Another leak was happening because mlx5e_skb_fifo_has_room() had an error in the check. Comparing free running counters works well unless C promotes the types to something wider than the counter. In this case counters are u16 but the result of the substraction is promouted to int and it causes wrong result (negative value) of the check when producer have already overlapped but consumer haven't yet. Explicit cast to u16 fixes the issue.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.001320000 probability, percentile 0.031730000 (date 2026-08-06)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 58a518948f60153e8f6cb8361d2712aa3a1af94a 234cffda95e1049f58e8ec136ef105c633f0ed19 git Not specified
CNA Linux Linux affected 58a518948f60153e8f6cb8361d2712aa3a1af94a 68504c66d08c70fb92799722e25a932d311d74fd git Not specified
CNA Linux Linux affected 58a518948f60153e8f6cb8361d2712aa3a1af94a e435941b1da1a0be4ff8a7ae425774c76a5ac514 git Not specified
CNA Linux Linux affected 6.0 Not specified
CNA Linux Linux unaffected 6.0 semver Not specified
CNA Linux Linux unaffected 6.1.18 6.1.* semver Not specified
CNA Linux Linux unaffected 6.2.5 6.2.* semver Not specified
CNA Linux Linux unaffected 6.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/e435941b1da1a0be4ff8a7ae425774c76a5ac514 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/234cffda95e1049f58e8ec136ef105c633f0ed19 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/68504c66d08c70fb92799722e25a932d311d74fd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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