{"id":"CVE-2025-37932","state":"PUBLISHED","title":"sch_htb: make htb_qlen_notify() idempotent","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsch_htb: make htb_qlen_notify() idempotent\n\nhtb_qlen_notify() always deactivates the HTB class and in fact could\ntrigger a warning if it is already deactivated. Therefore, it is not\nidempotent and not friendly to its callers, like fq_codel_dequeue().\n\nLet's make it idempotent to ease qdisc_tree_reduce_backlog() callers'\nlife.","publishedAt":"2025-05-20T15:21:57.469Z","updatedAt":"2026-05-11T21:17:53.987Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"959466588aa7f84ccf79ae36a1d89542eaf9aaec","status":"affected","lessThan":"e6b45f4de763b00dc1c55e685e2dd1aaf525d3c1","versionType":"git"},{"version":"959466588aa7f84ccf79ae36a1d89542eaf9aaec","status":"affected","lessThan":"32ae12ce6a9f6bace186ca7335220ff59b6cc3cd","versionType":"git"},{"version":"959466588aa7f84ccf79ae36a1d89542eaf9aaec","status":"affected","lessThan":"967955c9e57f8eebfccc298037d4aaf3d42bc1c9","versionType":"git"},{"version":"959466588aa7f84ccf79ae36a1d89542eaf9aaec","status":"affected","lessThan":"73cf6af13153d62f9b76eff422eea79dbc70f15e","versionType":"git"},{"version":"959466588aa7f84ccf79ae36a1d89542eaf9aaec","status":"affected","lessThan":"bbbf5e0f87078b715e7a665d662a2c0e77f044ae","versionType":"git"},{"version":"959466588aa7f84ccf79ae36a1d89542eaf9aaec","status":"affected","lessThan":"0a188c0e197383683fd093ab1ea6ce9a5869a6ea","versionType":"git"},{"version":"959466588aa7f84ccf79ae36a1d89542eaf9aaec","status":"affected","lessThan":"a61f1b5921761fbaf166231418bc1db301e5bf59","versionType":"git"},{"version":"959466588aa7f84ccf79ae36a1d89542eaf9aaec","status":"affected","lessThan":"5ba8b837b522d7051ef81bacf3d95383ff8edce5","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/sch_htb.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.14","versionType":"semver"},{"version":"5.4.294","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.241","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.190","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.138","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.90","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.28","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.14.6","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_htb.c"]}],"references":["https://git.kernel.org/stable/c/e6b45f4de763b00dc1c55e685e2dd1aaf525d3c1","https://git.kernel.org/stable/c/32ae12ce6a9f6bace186ca7335220ff59b6cc3cd","https://git.kernel.org/stable/c/967955c9e57f8eebfccc298037d4aaf3d42bc1c9","https://git.kernel.org/stable/c/73cf6af13153d62f9b76eff422eea79dbc70f15e","https://git.kernel.org/stable/c/bbbf5e0f87078b715e7a665d662a2c0e77f044ae","https://git.kernel.org/stable/c/0a188c0e197383683fd093ab1ea6ce9a5869a6ea","https://git.kernel.org/stable/c/a61f1b5921761fbaf166231418bc1db301e5bf59","https://git.kernel.org/stable/c/5ba8b837b522d7051ef81bacf3d95383ff8edce5","https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html","https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:03.054Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/37xxx/CVE-2025-37932.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-37932","state":"PUBLISHED","datePublished":"2025-05-20T15:21:57.469Z","dateUpdated":"2026-05-11T21:17:53.987Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T04:51:23.970Z"},"containers":{"cna":{"title":"sch_htb: make htb_qlen_notify() idempotent","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nsch_htb: make htb_qlen_notify() idempotent\n\nhtb_qlen_notify() always deactivates the HTB class and in fact could\ntrigger a warning if it is already deactivated. Therefore, it is not\nidempotent and not friendly to its callers, like fq_codel_dequeue().\n\nLet's make it idempotent to ease qdisc_tree_reduce_backlog() callers'\nlife."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"959466588aa7f84ccf79ae36a1d89542eaf9aaec","status":"affected","lessThan":"e6b45f4de763b00dc1c55e685e2dd1aaf525d3c1","versionType":"git"},{"version":"959466588aa7f84ccf79ae36a1d89542eaf9aaec","status":"affected","lessThan":"32ae12ce6a9f6bace186ca7335220ff59b6cc3cd","versionType":"git"},{"version":"959466588aa7f84ccf79ae36a1d89542eaf9aaec","status":"affected","lessThan":"967955c9e57f8eebfccc298037d4aaf3d42bc1c9","versionType":"git"},{"version":"959466588aa7f84ccf79ae36a1d89542eaf9aaec","status":"affected","lessThan":"73cf6af13153d62f9b76eff422eea79dbc70f15e","versionType":"git"},{"version":"959466588aa7f84ccf79ae36a1d89542eaf9aaec","status":"affected","lessThan":"bbbf5e0f87078b715e7a665d662a2c0e77f044ae","versionType":"git"},{"version":"959466588aa7f84ccf79ae36a1d89542eaf9aaec","status":"affected","lessThan":"0a188c0e197383683fd093ab1ea6ce9a5869a6ea","versionType":"git"},{"version":"959466588aa7f84ccf79ae36a1d89542eaf9aaec","status":"affected","lessThan":"a61f1b5921761fbaf166231418bc1db301e5bf59","versionType":"git"},{"version":"959466588aa7f84ccf79ae36a1d89542eaf9aaec","status":"affected","lessThan":"5ba8b837b522d7051ef81bacf3d95383ff8edce5","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/sch_htb.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.14","versionType":"semver"},{"version":"5.4.294","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.241","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.190","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.138","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.90","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.28","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.14.6","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_htb.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/e6b45f4de763b00dc1c55e685e2dd1aaf525d3c1"},{"url":"https://git.kernel.org/stable/c/32ae12ce6a9f6bace186ca7335220ff59b6cc3cd"},{"url":"https://git.kernel.org/stable/c/967955c9e57f8eebfccc298037d4aaf3d42bc1c9"},{"url":"https://git.kernel.org/stable/c/73cf6af13153d62f9b76eff422eea79dbc70f15e"},{"url":"https://git.kernel.org/stable/c/bbbf5e0f87078b715e7a665d662a2c0e77f044ae"},{"url":"https://git.kernel.org/stable/c/0a188c0e197383683fd093ab1ea6ce9a5869a6ea"},{"url":"https://git.kernel.org/stable/c/a61f1b5921761fbaf166231418bc1db301e5bf59"},{"url":"https://git.kernel.org/stable/c/5ba8b837b522d7051ef81bacf3d95383ff8edce5"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:17:53.987Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"5.4.294"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"5.10.241"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"5.15.190"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"6.1.138"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"6.6.90"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"6.12.28"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"6.14.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"6.15"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"},{"url":"https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2025-11-03T19:57:30.412Z"}}]}}}