205 lines
9.8 KiB
JSON
205 lines
9.8 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2025-37953",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2025-04-16T04:51:23.973Z",
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"datePublished": "2025-05-20T16:01:47.818Z",
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"dateUpdated": "2026-05-11T21:18:17.815Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-05-11T21:18:17.815Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsch_htb: make htb_deactivate() idempotent\n\nAlan reported a NULL pointer dereference in htb_next_rb_node()\nafter we made htb_qlen_notify() idempotent.\n\nIt turns out in the following case it introduced some regression:\n\nhtb_dequeue_tree():\n |-> fq_codel_dequeue()\n |-> qdisc_tree_reduce_backlog()\n |-> htb_qlen_notify()\n |-> htb_deactivate()\n |-> htb_next_rb_node()\n |-> htb_deactivate()\n\nFor htb_next_rb_node(), after calling the 1st htb_deactivate(), the\nclprio[prio]->ptr could be already set to NULL, which means\nhtb_next_rb_node() is vulnerable here.\n\nFor htb_deactivate(), although we checked qlen before calling it, in\ncase of qlen==0 after qdisc_tree_reduce_backlog(), we may call it again\nwhich triggers the warning inside.\n\nTo fix the issues here, we need to:\n\n1) Make htb_deactivate() idempotent, that is, simply return if we\n already call it before.\n2) Make htb_next_rb_node() safe against ptr==NULL.\n\nMany thanks to Alan for testing and for the reproducer."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/sched/sch_htb.c"
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],
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"versions": [
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{
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"version": "e6b45f4de763b00dc1c55e685e2dd1aaf525d3c1",
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"lessThan": "99ff8a20fd61315bf9ae627440a5ff07d22ee153",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "32ae12ce6a9f6bace186ca7335220ff59b6cc3cd",
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"lessThan": "a9945f7cf1709adc5d2d31cb6cfc85627ce299a8",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "967955c9e57f8eebfccc298037d4aaf3d42bc1c9",
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"lessThan": "c2d25fddd867ce20a266806634eeeb5c30cb520c",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "73cf6af13153d62f9b76eff422eea79dbc70f15e",
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"lessThan": "c928dd4f6bf0c25c72b11824a1e9ac9bd37296a0",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bbbf5e0f87078b715e7a665d662a2c0e77f044ae",
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"lessThan": "31ff70ad39485698cf779f2078132d80b57f6c07",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0a188c0e197383683fd093ab1ea6ce9a5869a6ea",
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"lessThan": "98cd7ed92753090a714f0802d4434314526fe61d",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a61f1b5921761fbaf166231418bc1db301e5bf59",
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"lessThan": "c4792b9e38d2f61b07eac72f10909fa76130314b",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "5ba8b837b522d7051ef81bacf3d95383ff8edce5",
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"lessThan": "3769478610135e82b262640252d90f6efb05be71",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/sched/sch_htb.c"
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],
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"versions": [
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{
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"version": "6.1.138",
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"lessThan": "6.1.139",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.6.90",
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"lessThan": "6.6.91",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.12.28",
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"lessThan": "6.12.29",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.14.6",
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"lessThan": "6.14.7",
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"status": "affected",
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"versionType": "semver"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.1.138",
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"versionEndExcluding": "6.1.139"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.6.90",
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"versionEndExcluding": "6.6.91"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.12.28",
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"versionEndExcluding": "6.12.29"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.14.6",
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"versionEndExcluding": "6.14.7"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/99ff8a20fd61315bf9ae627440a5ff07d22ee153"
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},
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{
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"url": "https://git.kernel.org/stable/c/a9945f7cf1709adc5d2d31cb6cfc85627ce299a8"
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},
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{
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"url": "https://git.kernel.org/stable/c/c2d25fddd867ce20a266806634eeeb5c30cb520c"
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},
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{
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"url": "https://git.kernel.org/stable/c/c928dd4f6bf0c25c72b11824a1e9ac9bd37296a0"
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},
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{
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"url": "https://git.kernel.org/stable/c/31ff70ad39485698cf779f2078132d80b57f6c07"
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},
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{
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"url": "https://git.kernel.org/stable/c/98cd7ed92753090a714f0802d4434314526fe61d"
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},
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{
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"url": "https://git.kernel.org/stable/c/c4792b9e38d2f61b07eac72f10909fa76130314b"
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},
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{
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"url": "https://git.kernel.org/stable/c/3769478610135e82b262640252d90f6efb05be71"
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}
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],
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"title": "sch_htb: make htb_deactivate() idempotent",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html"
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}
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],
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2025-11-03T19:57:42.885Z"
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}
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}
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]
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}
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} |