{"id":"CVE-2025-38637","state":"PUBLISHED","title":"net_sched: skbprio: Remove overly strict queue assertions","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet_sched: skbprio: Remove overly strict queue assertions\n\nIn the current implementation, skbprio enqueue/dequeue contains an assertion\nthat fails under certain conditions when SKBPRIO is used as a child qdisc under\nTBF with specific parameters. The failure occurs because TBF sometimes peeks at\npackets in the child qdisc without actually dequeuing them when tokens are\nunavailable.\n\nThis peek operation creates a discrepancy between the parent and child qdisc\nqueue length counters. When TBF later receives a high-priority packet,\nSKBPRIO's queue length may show a different value than what's reflected in its\ninternal priority queue tracking, triggering the assertion.\n\nThe fix removes this overly strict assertions in SKBPRIO, they are not\nnecessary at all.","publishedAt":"2025-04-18T07:01:34.564Z","updatedAt":"2026-05-11T21:32:04.448Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"aea5f654e6b78a0c976f7a25950155932c77a53f","status":"affected","lessThan":"7abc8318ce0712182bf0783dcfdd9a6a8331160e","versionType":"git"},{"version":"aea5f654e6b78a0c976f7a25950155932c77a53f","status":"affected","lessThan":"1284733bab736e598341f1d3f3b94e2a322864a8","versionType":"git"},{"version":"aea5f654e6b78a0c976f7a25950155932c77a53f","status":"affected","lessThan":"32ee79682315e6d3c99947b3f38b078a09a66919","versionType":"git"},{"version":"aea5f654e6b78a0c976f7a25950155932c77a53f","status":"affected","lessThan":"1dcc144c322a8d526b791135604c0663f1af9d85","versionType":"git"},{"version":"aea5f654e6b78a0c976f7a25950155932c77a53f","status":"affected","lessThan":"864ca690ff135078d374bd565b9872f161c614bc","versionType":"git"},{"version":"aea5f654e6b78a0c976f7a25950155932c77a53f","status":"affected","lessThan":"2f35b7673a3aa3d09b3eb05811669622ebaa98ca","versionType":"git"},{"version":"aea5f654e6b78a0c976f7a25950155932c77a53f","status":"affected","lessThan":"2286770b07cb5268c03d11274b8efd43dff0d380","versionType":"git"},{"version":"aea5f654e6b78a0c976f7a25950155932c77a53f","status":"affected","lessThan":"034b293bf17c124fec0f0e663f81203b00aa7a50","versionType":"git"},{"version":"aea5f654e6b78a0c976f7a25950155932c77a53f","status":"affected","lessThan":"ce8fe975fd99b49c29c42e50f2441ba53112b2e8","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/sch_skbprio.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.19","versionType":"semver"},{"version":"5.4.292","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.236","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.180","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.134","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.87","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.23","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.13.11","status":"unaffected","lessThanOrEqual":"6.13.*","versionType":"semver"},{"version":"6.14.2","status":"unaffected","lessThanOrEqual":"6.14.*","versionType":"semver"},{"version":"6.15","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/sch_skbprio.c"]}],"references":["https://git.kernel.org/stable/c/7abc8318ce0712182bf0783dcfdd9a6a8331160e","https://git.kernel.org/stable/c/1284733bab736e598341f1d3f3b94e2a322864a8","https://git.kernel.org/stable/c/32ee79682315e6d3c99947b3f38b078a09a66919","https://git.kernel.org/stable/c/1dcc144c322a8d526b791135604c0663f1af9d85","https://git.kernel.org/stable/c/864ca690ff135078d374bd565b9872f161c614bc","https://git.kernel.org/stable/c/2f35b7673a3aa3d09b3eb05811669622ebaa98ca","https://git.kernel.org/stable/c/2286770b07cb5268c03d11274b8efd43dff0d380","https://git.kernel.org/stable/c/034b293bf17c124fec0f0e663f81203b00aa7a50","https://git.kernel.org/stable/c/ce8fe975fd99b49c29c42e50f2441ba53112b2e8","https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html","https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/38xxx/CVE-2025-38637.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-38637","state":"PUBLISHED","datePublished":"2025-04-18T07:01:34.564Z","dateUpdated":"2026-05-11T21:32:04.448Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T04:51:24.030Z"},"containers":{"cna":{"title":"net_sched: skbprio: Remove overly strict queue assertions","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet_sched: skbprio: Remove overly strict queue assertions\n\nIn the current implementation, skbprio enqueue/dequeue contains an assertion\nthat fails under certain conditions when SKBPRIO is used as a child qdisc under\nTBF with specific parameters. The failure occurs because TBF sometimes peeks at\npackets in the child qdisc without actually dequeuing them when tokens are\nunavailable.\n\nThis peek operation creates a discrepancy between the parent and child qdisc\nqueue length counters. When TBF later receives a high-priority packet,\nSKBPRIO's queue length may show a different value than what's reflected in its\ninternal priority queue tracking, triggering the assertion.\n\nThe fix removes this overly strict assertions in SKBPRIO, they are not\nnecessary at all."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"aea5f654e6b78a0c976f7a25950155932c77a53f","status":"affected","lessThan":"7abc8318ce0712182bf0783dcfdd9a6a8331160e","versionType":"git"},{"version":"aea5f654e6b78a0c976f7a25950155932c77a53f","status":"affected","lessThan":"1284733bab736e598341f1d3f3b94e2a322864a8","versionType":"git"},{"version":"aea5f654e6b78a0c976f7a25950155932c77a53f","status":"affected","lessThan":"32ee79682315e6d3c99947b3f38b078a09a66919","versionType":"git"},{"version":"aea5f654e6b78a0c976f7a25950155932c77a53f","status":"affected","lessThan":"1dcc144c322a8d526b791135604c0663f1af9d85","versionType":"git"},{"version":"aea5f654e6b78a0c976f7a25950155932c77a53f","status":"affected","lessThan":"864ca690ff135078d374bd565b9872f161c614bc","versionType":"git"},{"version":"aea5f654e6b78a0c976f7a25950155932c77a53f","status":"affected","lessThan":"2f35b7673a3aa3d09b3eb05811669622ebaa98ca","versionType":"git"},{"version":"aea5f654e6b78a0c976f7a25950155932c77a53f","status":"affected","lessThan":"2286770b07cb5268c03d11274b8efd43dff0d380","versionType":"git"},{"version":"aea5f654e6b78a0c976f7a25950155932c77a53f","status":"affected","lessThan":"034b293bf17c124fec0f0e663f81203b00aa7a50","versionType":"git"},{"version":"aea5f654e6b78a0c976f7a25950155932c77a53f","status":"affected","lessThan":"ce8fe975fd99b49c29c42e50f2441ba53112b2e8","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/sch_skbprio.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.19","versionType":"semver"},{"version":"5.4.292","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.236","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.180","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.134","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.87","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.23","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.13.11","status":"unaffected","lessThanOrEqual":"6.13.*","versionType":"semver"},{"version":"6.14.2","status":"unaffected","lessThanOrEqual":"6.14.*","versionType":"semver"},{"version":"6.15","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/sch_skbprio.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/7abc8318ce0712182bf0783dcfdd9a6a8331160e"},{"url":"https://git.kernel.org/stable/c/1284733bab736e598341f1d3f3b94e2a322864a8"},{"url":"https://git.kernel.org/stable/c/32ee79682315e6d3c99947b3f38b078a09a66919"},{"url":"https://git.kernel.org/stable/c/1dcc144c322a8d526b791135604c0663f1af9d85"},{"url":"https://git.kernel.org/stable/c/864ca690ff135078d374bd565b9872f161c614bc"},{"url":"https://git.kernel.org/stable/c/2f35b7673a3aa3d09b3eb05811669622ebaa98ca"},{"url":"https://git.kernel.org/stable/c/2286770b07cb5268c03d11274b8efd43dff0d380"},{"url":"https://git.kernel.org/stable/c/034b293bf17c124fec0f0e663f81203b00aa7a50"},{"url":"https://git.kernel.org/stable/c/ce8fe975fd99b49c29c42e50f2441ba53112b2e8"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:32:04.448Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"5.4.292"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"5.10.236"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"5.15.180"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.1.134"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.6.87"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.12.23"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.13.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.14.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.15"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"a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