| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "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." |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "net/sched/sch_htb.c" |
| ], |
| "versions": [ |
| { |
| "version": "e6b45f4de763b00dc1c55e685e2dd1aaf525d3c1", |
| "lessThan": "99ff8a20fd61315bf9ae627440a5ff07d22ee153", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "73cf6af13153d62f9b76eff422eea79dbc70f15e", |
| "lessThan": "c928dd4f6bf0c25c72b11824a1e9ac9bd37296a0", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "bbbf5e0f87078b715e7a665d662a2c0e77f044ae", |
| "lessThan": "31ff70ad39485698cf779f2078132d80b57f6c07", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "0a188c0e197383683fd093ab1ea6ce9a5869a6ea", |
| "lessThan": "98cd7ed92753090a714f0802d4434314526fe61d", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "a61f1b5921761fbaf166231418bc1db301e5bf59", |
| "lessThan": "c4792b9e38d2f61b07eac72f10909fa76130314b", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "5ba8b837b522d7051ef81bacf3d95383ff8edce5", |
| "lessThan": "3769478610135e82b262640252d90f6efb05be71", |
| "status": "affected", |
| "versionType": "git" |
| } |
| ] |
| }, |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "net/sched/sch_htb.c" |
| ], |
| "versions": [ |
| { |
| "version": "6.1.138", |
| "lessThan": "6.1.139", |
| "status": "affected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.6.90", |
| "lessThan": "6.6.91", |
| "status": "affected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.12.28", |
| "lessThan": "6.12.29", |
| "status": "affected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.14.6", |
| "lessThan": "6.14.7", |
| "status": "affected", |
| "versionType": "semver" |
| } |
| ] |
| } |
| ], |
| "cpeApplicability": [ |
| { |
| "nodes": [ |
| { |
| "operator": "OR", |
| "negate": false, |
| "cpeMatch": [ |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.1.138", |
| "versionEndExcluding": "6.1.139" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.6.90", |
| "versionEndExcluding": "6.6.91" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.12.28", |
| "versionEndExcluding": "6.12.29" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.14.6", |
| "versionEndExcluding": "6.14.7" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/99ff8a20fd61315bf9ae627440a5ff07d22ee153" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/c928dd4f6bf0c25c72b11824a1e9ac9bd37296a0" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/31ff70ad39485698cf779f2078132d80b57f6c07" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/98cd7ed92753090a714f0802d4434314526fe61d" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/c4792b9e38d2f61b07eac72f10909fa76130314b" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/3769478610135e82b262640252d90f6efb05be71" |
| } |
| ], |
| "title": "sch_htb: make htb_deactivate() idempotent", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2025-37953", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
