CVE-2023-54238mlx5: fix skb leak while fifo resync and push
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: 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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/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
- Deferred
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 58a518948f60153e8f6cb8361d2712aa3a1af94a before 234cffda95e1049f58e8ec136ef105c633f0ed19; from 58a518948f60153e8f6cb8361d2712aa3a1af94a before 68504c66d08c70fb92799722e25a932d311d74fd; from 58a518948f60153e8f6cb8361d2712aa3a1af94a before e435941b1da1a0be4ff8a7ae425774c76a5ac514 | CNA record |
References
- https://git.kernel.org/stable/c/234cffda95e1049f58e8ec136ef105c633f0ed19
- https://git.kernel.org/stable/c/68504c66d08c70fb92799722e25a932d311d74fd
- https://git.kernel.org/stable/c/e435941b1da1a0be4ff8a7ae425774c76a5ac514
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.