CVE-2024-26690

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue is related to the protection of updates of 64-bit statistics counters in the Linux kernel. A comment in <linux/u64 stats sync.h> explains that the write side of struct u64 stats sync must ensure mutual exclusion, or one seqcount update could be lost on 32-bit platforms, thus blocking readers forever. Such lockups have been observed in real-world scenarios after stmmac xmit() on one CPU raced with stmmac napi poll tx() on another CPU. The fix involves splitting the statics into three parts: fields updated only under the tx queue lock, fields updated only during NAPI poll, and fields updated only from interrupt context.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.