VULN/vuln-cve
1
0 Fork 0
Code Pull Requests Actions Activity
Files
c1444140e59c61ba154436ea0cd6284d8a97c3f0
vuln-cve/data/2025/37xxx/CVE-2025-37823.json
T

314 lines
16 KiB
JSON
Raw Blame History

{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2025-37823",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2025-04-16T04:51:23.947Z",
"datePublished": "2025-05-08T06:26:16.839Z",
"dateUpdated": "2026-10-15T21:52:01.491Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-05T11:57:46.765Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet_sched: hfsc: Fix a potential UAF in hfsc_dequeue() too\n\nSimilarly to the previous patch, we need to safe guard hfsc_dequeue()\ntoo. But for this one, we don't have a reliable reproducer."
}
],
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 7.8,
"baseSeverity": "HIGH"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - Exploitation requires configuring an HFSC qdisc hierarchy with a netem/codel child and deleting a class via rtnetlink (RTM_NEWQDISC/RTM_NEWTCLASS/RTM_DELTCLASS), which is a local netlink socket operation. Per kernel scoring guidance, tc/netlink qdisc bugs are Local.\nAC:L - The attacker deterministically controls every element: the HFSC class curves (HFSC_RSC), the child qdisc's drop-on-dequeue behavior (netem loss/corrupt/nested-child enqueue failure, or aggressive codel parameters), packet injection, and the moment of class deletion; the whole sequence runs serialized under the qdisc/tree lock with no race to win. The absence of a maintainer reproducer reflects effort not spent, not a condition outside attacker control — the identical primitive in the companion commit 3df275ef0a6a had a reliable reproducer.\nPR:L - The rtnetlink handlers gate on netlink_net_capable(skb, CAP_NET_ADMIN), which is evaluated against the caller's netns user_ns, so an unprivileged user obtains it simply with `unshare -Urn` and can then create a dummy/veth device plus the full hfsc+netem hierarchy. No real root in the init namespace is needed.\nUI:N - The attacker performs the entire sequence — qdisc/class setup, packet transmission, and class deletion — from their own process. No victim action is involved.\nS:U - The corruption stays within the kernel's own memory and privilege domain, yielding standard local privilege escalation rather than crossing into another security authority such as a hypervisor or IOMMU boundary.\nC:H - The freed struct hfsc_class remains linked in the scheduler's eligible rbtree and is subsequently dereferenced, so a heap spray of the kmalloc-1k slot lets the attacker read back kernel data through the reclaimed object and its cl->qdisc pointer chain, giving effectively arbitrary kernel memory disclosure.\nI:H - After the free, hfsc_dequeue() performs an indirect call via qdisc_dequeue_peeked() through sch->dequeue read from the reclaimed object, plus bstats_update() writes and rb_erase()/rb_insert_color() on attacker-controlled node pointers — a direct control-flow hijack and arbitrary-write primitive leading to full kernel compromise.\nA:H - Even without successful heap grooming, traversing and erasing a freed rbtree node and calling through a stale function pointer reliably produces a kernel oops/panic, and the attacker can trigger it repeatedly for a complete denial of service."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/sched/sch_hfsc.c"
],
"versions": [
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "68f256305ceb426d545a0dc31f83c2ab1d211a1e",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "2f46d14919c39528c6e540ebc43f90055993eedc",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "da7936518996d290e2fcfcaf6cd7e15bfd87804a",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "11bccb054c1462fb069219f8e98e97a5a730758e",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "76c4c22c2437d3d3880efc0f62eca06ef078d290",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "c6f035044104c6ff656f4565cd22938dc892528c",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "c6936266f8bf98a53f28ef9a820e6a501e946d09",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "6ccbda44e2cc3d26fd22af54c650d6d5d801addf",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/sched/sch_hfsc.c"
],
"versions": [
{
"version": "2.6.12",
"status": "affected"
},
{
"version": "0",
"lessThan": "2.6.12",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.4.293",
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.237",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.181",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.136",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.89",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.26",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.14.5",
"lessThanOrEqual": "6.14.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.15",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "5.4.293"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "5.10.237"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "5.15.181"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "6.1.136"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "6.6.89"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "6.12.26"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "6.14.5"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "6.15"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/68f256305ceb426d545a0dc31f83c2ab1d211a1e"
},
{
"url": "https://git.kernel.org/stable/c/2f46d14919c39528c6e540ebc43f90055993eedc"
},
{
"url": "https://git.kernel.org/stable/c/da7936518996d290e2fcfcaf6cd7e15bfd87804a"
},
{
"url": "https://git.kernel.org/stable/c/11bccb054c1462fb069219f8e98e97a5a730758e"
},
{
"url": "https://git.kernel.org/stable/c/76c4c22c2437d3d3880efc0f62eca06ef078d290"
},
{
"url": "https://git.kernel.org/stable/c/c6f035044104c6ff656f4565cd22938dc892528c"
},
{
"url": "https://git.kernel.org/stable/c/c6936266f8bf98a53f28ef9a820e6a501e946d09"
},
{
"url": "https://git.kernel.org/stable/c/6ccbda44e2cc3d26fd22af54c650d6d5d801addf"
}
],
"title": "net_sched: hfsc: Fix a potential UAF in hfsc_dequeue() too",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"title": "CVE Program Container",
"references": [
{
"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
}
],
"providerMetadata": {
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE",
"dateUpdated": "2025-11-03T19:55:56.301Z"
}
},
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"id": "CVE-2025-37823",
"role": "CISA Coordinator",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"version": "2.0.3",
"timestamp": "2026-10-15T21:45:30.457885Z"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-10-15T21:52:01.491Z"
}
}
]
}
}
View Git Blame Copy Permalink