310 lines
16 KiB
JSON
310 lines
16 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-2026-72107",
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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": "2026-08-09T03:40:39.906Z",
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"datePublished": "2026-08-15T05:52:49.581Z",
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"dateUpdated": "2026-10-19T21:19:28.417Z"
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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": "2026-08-17T05:40:20.098Z"
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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\ndm era: fix out-of-bounds memory access for non-zero start sector\n\ndm-era tracks writes in target-relative blocks, but era_map() calculates\nthe writeset block before applying the target offset. Tables with a\nnon-zero start sector can therefore pass an absolute mapped-device block\nto metadata_current_marked().\n\nIf the absolute block is beyond the current writeset size,\nwriteset_marked() tests past the end of the in-core bitset. KASAN reports\nthis as a vmalloc-out-of-bounds access.\n\nApply the target offset before calculating the era block so writeset\nlookups use the target-relative block number."
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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:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8.8,
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"baseSeverity": "HIGH"
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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 bug is hit in era_map() on write bios submitted to a dm-era device; on storage servers that expose dm-era-backed LUNs via iSCSI or NVMe-oF, a remote initiator's SCSI/NVMe writes traverse the network stack into dm_submit_bio() and reach the flawed writeset lookup without local shell access.\nAC:L - Once a dm-era table uses a non-zero start sector (common when mapping a partition offset), any single write I/O deterministically passes an out-of-range block index to writeset_marked()/test_bit(); no race, special heap layout, or victim state beyond that configuration is required.\nPR:L - Exploitation requires only write access to the dm-era-backed block device (filesystem, raw /dev/dm-* node, or authenticated iSCSI/NVMe-oF initiator credentials); loading the dm table needs CAP_SYS_ADMIN, but triggering the OOB read does not—unprivileged local users or remote storage clients with write permission suffice.\nUI:N - Triggering the flaw requires only the attacker's own write I/O to the dm-era volume; no victim must mount a filesystem, open a file, click a link, or perform any separate interactive action beyond routine storage writes.\nS:U - The vmalloc out-of-bounds read and any resulting kernel oops or privilege escalation occur entirely within the host kernel's device-mapper/storage subsystem on the same machine; this is not a VM escape, IOMMU bypass, or other cross-security-authority boundary violation.\nC:H - writeset_marked() calls test_bit() with an attacker-influenced block index derived from the write offset; when the absolute block exceeds the writeset size this is a vmalloc out-of-bounds read that can disclose adjacent kernel heap memory, matching CNA guidance for OOB reads.\nI:H - Kernel vmalloc out-of-bounds access via test_bit() is memory corruption in a privileged context; disclosed adjacent heap contents can be used to craft follow-on arbitrary-write or control-flow hijack primitives, so integrity impact is rated High when uncertain between Low and High.\nA:H - KASAN reports this as vmalloc-out-of-bounds, and reading past the vzalloc'd bitset can fault on unmapped pages or provoke a kernel oops/panic, causing immediate denial of service on storage nodes processing writes through dm-era."
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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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"drivers/md/dm-era-target.c"
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],
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"versions": [
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{
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"version": "eec40579d84873dfb7021eb24c50360f073237c5",
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"lessThan": "fe94a0b14010a3c267ff9a2508afb4f27ff1c5bf",
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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": "eec40579d84873dfb7021eb24c50360f073237c5",
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"lessThan": "e3ffa8e492e5cdee62d916ee3e9244ccce2b73c5",
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"status": "affected",
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},
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{
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"lessThan": "9946a7176bd8c25ddd6e5f1799c54e572ee6bf0f",
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"status": "affected",
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{
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"lessThan": "7e1822f83c5a1ee7b4a19e98edde8770a10b4c71",
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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": "eec40579d84873dfb7021eb24c50360f073237c5",
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"lessThan": "db5f9b4601f0012038e5a2628aedec2f47933380",
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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": "eec40579d84873dfb7021eb24c50360f073237c5",
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"lessThan": "1fcb5e29dd7a5b85adb9d8b539911741d878e829",
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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": "eec40579d84873dfb7021eb24c50360f073237c5",
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"lessThan": "bafe3e720cdac38cd7ea4eb7852a8f2dbe1bbfe6",
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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": "eec40579d84873dfb7021eb24c50360f073237c5",
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"lessThan": "a868196f03c2b19418ae3d2b69e195d668a271e5",
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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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"drivers/md/dm-era-target.c"
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],
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"versions": [
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{
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"version": "3.15",
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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": "3.15",
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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": "5.10.261",
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"lessThanOrEqual": "5.10.*",
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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": "5.15.212",
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"lessThanOrEqual": "5.15.*",
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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": "6.1.178",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.145",
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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": "6.12.97",
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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": "6.18.40",
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"lessThanOrEqual": "6.18.*",
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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": "7.1.5",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.15",
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"references": [
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"url": "https://git.kernel.org/stable/c/fe94a0b14010a3c267ff9a2508afb4f27ff1c5bf"
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},
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{
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"url": "https://git.kernel.org/stable/c/e3ffa8e492e5cdee62d916ee3e9244ccce2b73c5"
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},
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{
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"url": "https://git.kernel.org/stable/c/9946a7176bd8c25ddd6e5f1799c54e572ee6bf0f"
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},
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{
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"url": "https://git.kernel.org/stable/c/7e1822f83c5a1ee7b4a19e98edde8770a10b4c71"
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},
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{
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"url": "https://git.kernel.org/stable/c/db5f9b4601f0012038e5a2628aedec2f47933380"
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},
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{
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"url": "https://git.kernel.org/stable/c/1fcb5e29dd7a5b85adb9d8b539911741d878e829"
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},
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{
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"url": "https://git.kernel.org/stable/c/bafe3e720cdac38cd7ea4eb7852a8f2dbe1bbfe6"
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},
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{
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"url": "https://git.kernel.org/stable/c/a868196f03c2b19418ae3d2b69e195d668a271e5"
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}
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],
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"title": "dm era: fix out-of-bounds memory access for non-zero start sector",
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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-2026-72107",
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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": "no"
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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": "2026-10-16T15:52:12.284460Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-125",
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"description": "CWE-125 Out-of-bounds Read"
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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": "2026-10-19T21:19:28.417Z"
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}
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}
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]
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}
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} |