net_sched: skbprio: Remove overly strict queue assertions
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
In the Linux kernel, the following vulnerability has been resolved: net_sched: skbprio: Remove overly strict queue assertions In the current implementation, skbprio enqueue/dequeue contains an assertion that fails under certain conditions when SKBPRIO is used as a child qdisc under TBF with specific parameters. The failure occurs because TBF sometimes peeks at packets in the child qdisc without actually dequeuing them when tokens are unavailable. This peek operation creates a discrepancy between the parent and child qdisc queue length counters. When TBF later receives a high-priority packet, SKBPRIO's queue length may show a different value than what's reflected in its internal priority queue tracking, triggering the assertion. The fix removes this overly strict assertions in SKBPRIO, they are not necessary at all.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
4.19
References 9
git.kernel.org
- stable/c/7abc8318ce0712182bf0783dcfdd9a6a8331160e
- stable/c/1284733bab736e598341f1d3f3b94e2a322864a8
- stable/c/32ee79682315e6d3c99947b3f38b078a09a66919
- stable/c/1dcc144c322a8d526b791135604c0663f1af9d85
- stable/c/864ca690ff135078d374bd565b9872f161c614bc
- stable/c/2f35b7673a3aa3d09b3eb05811669622ebaa98ca
- stable/c/2286770b07cb5268c03d11274b8efd43dff0d380
- stable/c/034b293bf17c124fec0f0e663f81203b00aa7a50
- stable/c/ce8fe975fd99b49c29c42e50f2441ba53112b2e8