227 lines
12 KiB
JSON
227 lines
12 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2024-43832",
|
|
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "Linux",
|
|
"dateReserved": "2024-08-17T09:11:59.273Z",
|
|
"datePublished": "2024-08-17T09:21:50.230Z",
|
|
"dateUpdated": "2026-08-05T11:36:41.646Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"shortName": "Linux",
|
|
"dateUpdated": "2026-08-05T11:36:41.646Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/uv: Don't call folio_wait_writeback() without a folio reference\n\nfolio_wait_writeback() requires that no spinlocks are held and that\na folio reference is held, as documented. After we dropped the PTL, the\nfolio could get freed concurrently. So grab a temporary reference."
|
|
}
|
|
],
|
|
"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 - The vulnerable code is reached through the s390 KVM protected-virtualization path — the `KVM_S390_PV_COMMAND`/`KVM_RUN` ioctls on /dev/kvm and the host's secure/non-secure storage-access fault handler running in the vCPU thread. No network input is involved, so local system access is required.\nAC:L - The attacker controls both sides of the race: it forces `rc == -EAGAIN` deterministically (start writeback on the file/shmem-backed guest page so `make_folio_secure()` returns -EAGAIN, or hold the folio lock) while a second thread `MADV_DONTNEED`s/munmaps that guest memory to free the folio in the window after the PTL and mmap_read_lock are dropped. The attempt is cheap and infinitely retryable.\nPR:L - Only an unprivileged local user with access to /dev/kvm (commonly mode 0666 or the `kvm` group on distros) is needed to create a VM, enable protected virtualization, and drive the unpack/secure-storage paths; no CAP_SYS_ADMIN or real root is required. A malicious guest reaching `handle_pv_uvc()` with a guest-controlled address is likewise not a privileged host actor.\nUI:N - The entire sequence is performed by the attacker's own threads via ioctls and memory-management syscalls on its own VM. No victim action of any kind is needed.\nS:U - The attacking process and the corrupted resources (host kernel MM metadata) live under the same security authority — this is a local host-kernel compromise, not an IOMMU or hypervisor-boundary escape granting control of a separate authority.\nC:H - This is a use-after-free on a folio whose `struct page` has been reallocated to an unrelated owner; the code reads that stale state and the resulting page-state corruption is leverageable for disclosure of memory belonging to other subsystems. Per UAF scoring guidance, confidentiality impact is High.\nI:H - `folio_wait_bit_common()` performs an atomic `set_bit(PG_waiters, &folio->flags)` write into a `struct page` that now describes someone else's allocation, corrupting core MM metadata for a page the attacker can influence the reuse of via heap/page grooming — a write primitive into kernel state, hence High.\nA:H - A stale `PG_writeback` bit in the reused page makes `folio_wait_bit()` sleep TASK_UNINTERRUPTIBLE with no waker, producing an unkillable task and hung-task panics, while a spurious `PG_waiters` trips `bad_page()` (\"BUG: Bad page state\") since `PAGE_FLAGS_CHECK_AT_PREP` covers the whole flags mask. Either outcome is a full kernel-level denial of service."
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "unaffected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"arch/s390/kernel/uv.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "214d9bbcd3a67230b932f6cea83c078ab34d9e70",
|
|
"lessThan": "1a1eb2f3fc453dcd52726d13e863938561489cb7",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "214d9bbcd3a67230b932f6cea83c078ab34d9e70",
|
|
"lessThan": "8736604ef53359a718c246087cd21dcec232d2fb",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "214d9bbcd3a67230b932f6cea83c078ab34d9e70",
|
|
"lessThan": "b21aba72aadd94bdac275deab021fc84d6c72b16",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "214d9bbcd3a67230b932f6cea83c078ab34d9e70",
|
|
"lessThan": "3f29f6537f54d74e64bac0a390fb2e26da25800d",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "affected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"arch/s390/kernel/uv.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "5.7",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"lessThan": "5.7",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.1.103",
|
|
"lessThanOrEqual": "6.1.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.6.44",
|
|
"lessThanOrEqual": "6.6.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.10.3",
|
|
"lessThanOrEqual": "6.10.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.11",
|
|
"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": "5.7",
|
|
"versionEndExcluding": "6.1.103"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.7",
|
|
"versionEndExcluding": "6.6.44"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.7",
|
|
"versionEndExcluding": "6.10.3"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.7",
|
|
"versionEndExcluding": "6.11"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/1a1eb2f3fc453dcd52726d13e863938561489cb7"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/8736604ef53359a718c246087cd21dcec232d2fb"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/b21aba72aadd94bdac275deab021fc84d6c72b16"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/3f29f6537f54d74e64bac0a390fb2e26da25800d"
|
|
}
|
|
],
|
|
"title": "s390/uv: Don't call folio_wait_writeback() without a folio reference",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
},
|
|
"adp": [
|
|
{
|
|
"metrics": [
|
|
{
|
|
"other": {
|
|
"type": "ssvc",
|
|
"content": {
|
|
"id": "CVE-2024-43832",
|
|
"role": "CISA Coordinator",
|
|
"options": [
|
|
{
|
|
"Exploitation": "none"
|
|
},
|
|
{
|
|
"Automatable": "no"
|
|
},
|
|
{
|
|
"Technical Impact": "partial"
|
|
}
|
|
],
|
|
"version": "2.0.3",
|
|
"timestamp": "2024-09-10T16:08:24.816195Z"
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"title": "CISA ADP Vulnrichment",
|
|
"providerMetadata": {
|
|
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
|
"shortName": "CISA-ADP",
|
|
"dateUpdated": "2024-09-12T17:33:07.778Z"
|
|
}
|
|
},
|
|
{
|
|
"title": "CVE Program Container",
|
|
"references": [
|
|
{
|
|
"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
|
|
}
|
|
],
|
|
"providerMetadata": {
|
|
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
|
|
"shortName": "CVE",
|
|
"dateUpdated": "2025-11-03T22:05:16.929Z"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
} |