235 lines
12 KiB
JSON
235 lines
12 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-2025-38660",
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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": "2025-04-16T04:51:24.031Z",
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"datePublished": "2025-08-22T16:01:03.686Z",
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"dateUpdated": "2026-10-15T22:02:27.813Z"
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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": "2026-09-14T11:58:04.340Z"
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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\n[ceph] parse_longname(): strrchr() expects NUL-terminated string\n\n... and parse_longname() is not guaranteed that. That's the reason\nwhy it uses kmemdup_nul() to build the argument for kstrtou64();\nthe problem is, kstrtou64() is not the only thing that need it.\n\nJust get a NUL-terminated copy of the entire thing and be done\nwith that..."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 9.8,
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"baseSeverity": "CRITICAL"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:N - The unterminated string is dentry-name data read directly out of a Ceph MDS reply message (`info->dname = *p`, `_name = *p`) sitting in the kvmalloc'd `msg->front` buffer, so a malicious/compromised MDS or an on-path attacker on unencrypted cephfs traffic supplies it remotely. No local caller can produce a non-NUL-terminated name.\nAC:L - The attacker fully controls the reply contents and the exact `front_len`, so they can place the name flush against the end of the allocation and make the overread deterministic; the only build requirement is `CONFIG_FS_ENCRYPTION=y`, which is standard in distro and Android kernels, and no encryption key or encrypted directory is needed since `parse_longname()` runs before those checks.\nPR:N - The attacker holds no account or privilege on the victim client — the malicious reply is processed by the messenger/MDS-client code with no authorization check on the client side. Any process's routine directory access on the already-established mount suffices to consume it.\nUI:N - The snapdir condition depends on the server-supplied `snapid`, so a hostile MDS can mark an ordinary directory as `CEPH_SNAPDIR` and trigger the path on any normal readdir or lookup — no deliberate `.snap` access, remount, or other victim action is required.\nS:U - The out-of-bounds access is confined to kernel memory within the same security authority as the ceph client; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - `strrchr()` reads unbounded adjacent kernel heap until it finds a NUL, and the resulting inflated `*name_len` causes those out-of-bounds bytes to be base64-decoded and propagated into the dentry name handed back toward userspace, giving an unbounded kernel memory disclosure primitive.\nI:H - The corrupted `*name_len` is no longer bounded by the `NAME_MAX` check (which was applied to the pre-parse copy), so `ceph_base64_decode()` and `fscrypt_fname_disk_to_usr()` write far past the end of the `NAME_MAX` fscrypt buffer or the message front buffer, yielding a heap out-of-bounds write with attacker-influenced data.\nA:H - The overread walks off a kvmalloc allocation and can hit a vmalloc guard page or unmapped memory, and the derived oversized length drives a heap overflow — either produces an oops/panic in the ceph messenger work context, and the attacker can repeat it on every reply."
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}
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]
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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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"fs/ceph/crypto.c"
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],
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"versions": [
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{
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"version": "dd66df0053ef84add5e684df517aa9b498342381",
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"lessThan": "4b9aee707c4580511983a0998547f3b28514e6a6",
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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": "dd66df0053ef84add5e684df517aa9b498342381",
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"lessThan": "bb80f7618832d26f7e395f52f82b1dac76223e5f",
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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": "dd66df0053ef84add5e684df517aa9b498342381",
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"lessThan": "3145b2b11492d61c512bbc59660bb823bc757f48",
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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": "dd66df0053ef84add5e684df517aa9b498342381",
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"lessThan": "493479af8af3ab907f49e99323777d498a4fbd2b",
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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": "dd66df0053ef84add5e684df517aa9b498342381",
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"lessThan": "101841c38346f4ca41dc1802c867da990ffb32eb",
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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": "affected",
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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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"fs/ceph/crypto.c"
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],
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"versions": [
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{
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"version": "6.6",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.6",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.157",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.42",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.15.10",
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"lessThanOrEqual": "6.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.16.1",
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"lessThanOrEqual": "6.16.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.17",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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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": "6.6",
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"versionEndExcluding": "6.6.157"
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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",
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"versionEndExcluding": "6.12.42"
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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",
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"versionEndExcluding": "6.15.10"
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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",
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"versionEndExcluding": "6.16.1"
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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",
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"versionEndExcluding": "6.17"
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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/4b9aee707c4580511983a0998547f3b28514e6a6"
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},
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{
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"url": "https://git.kernel.org/stable/c/bb80f7618832d26f7e395f52f82b1dac76223e5f"
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},
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{
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"url": "https://git.kernel.org/stable/c/3145b2b11492d61c512bbc59660bb823bc757f48"
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},
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{
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"url": "https://git.kernel.org/stable/c/493479af8af3ab907f49e99323777d498a4fbd2b"
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},
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{
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"url": "https://git.kernel.org/stable/c/101841c38346f4ca41dc1802c867da990ffb32eb"
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}
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],
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"title": "[ceph] parse_longname(): strrchr() expects NUL-terminated string",
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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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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2025-38660",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "yes"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-15T21:52:41.406590Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-15T22:02:27.813Z"
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}
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}
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]
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}
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} |