Vulnerability 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.
CVSS Score
HIGH
References
- https://git.kernel.org/stable/c/234cffda95e1049f58e8ec136ef105c633f0ed19
- https://git.kernel.org/stable/c/68504c66d08c70fb92799722e25a932d311d74fd
- https://git.kernel.org/stable/c/e435941b1da1a0be4ff8a7ae425774c76a5ac514
FAQ
What is CVE-2023-54238?
CVE-2023-54238 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 neith...
How severe is CVE-2023-54238?
CVE-2023-54238 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-54238?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.