vulnerability
Red Hat: CVE-2025-38568: kernel: net/sched: mqprio: fix stack out-of-bounds write in tc entry parsing (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:L/AC:M/Au:S/C:N/I:N/A:C) | Aug 19, 2025 | Feb 3, 2026 | Feb 4, 2026 |
Severity
4
CVSS
(AV:L/AC:M/Au:S/C:N/I:N/A:C)
Published
Aug 19, 2025
Added
Feb 3, 2026
Modified
Feb 4, 2026
Description
In the Linux kernel, the following vulnerability has been resolved:
net/sched: mqprio: fix stack out-of-bounds write in tc entry parsing
TCA_MQPRIO_TC_ENTRY_INDEX is validated using
NLA_POLICY_MAX(NLA_U32, TC_QOPT_MAX_QUEUE), which allows the value
TC_QOPT_MAX_QUEUE (16). This leads to a 4-byte out-of-bounds stack
write in the fp[] array, which only has room for 16 elements (0–15).
Fix this by changing the policy to allow only up to TC_QOPT_MAX_QUEUE - 1.
Solutions
redhat-upgrade-kernelredhat-upgrade-kernel-rt
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