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Description

In 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.

PUBLISHED Reserved 2025-12-30 | Published 2025-12-30 | Updated 2025-12-30 | Assigner Linux

Product status

Default status
unaffected

58a518948f60153e8f6cb8361d2712aa3a1af94a (git) before 234cffda95e1049f58e8ec136ef105c633f0ed19
affected

58a518948f60153e8f6cb8361d2712aa3a1af94a (git) before 68504c66d08c70fb92799722e25a932d311d74fd
affected

58a518948f60153e8f6cb8361d2712aa3a1af94a (git) before e435941b1da1a0be4ff8a7ae425774c76a5ac514
affected

Default status
affected

6.0
affected

Any version before 6.0
unaffected

6.1.18 (semver)
unaffected

6.2.5 (semver)
unaffected

6.3 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/234cffda95e1049f58e8ec136ef105c633f0ed19

git.kernel.org/...c/68504c66d08c70fb92799722e25a932d311d74fd

git.kernel.org/...c/e435941b1da1a0be4ff8a7ae425774c76a5ac514

cve.org (CVE-2023-54238)

nvd.nist.gov (CVE-2023-54238)

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Data based on CVE®. Copyright © 1999-2025, The MITRE Corporation. All rights reserved.