205 lines
11 KiB
JSON
205 lines
11 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-2026-31435",
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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": "2026-03-09T15:48:24.089Z",
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"datePublished": "2026-04-22T13:53:35.032Z",
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"dateUpdated": "2026-10-19T18:35:47.887Z"
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},
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T12:22:28.838Z"
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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\nnetfs: Fix read abandonment during retry\n\nUnder certain circumstances, all the remaining subrequests from a read\nrequest will get abandoned during retry. The abandonment process expects\nthe 'subreq' variable to be set to the place to start abandonment from, but\nit doesn't always have a useful value (it will be uninitialised on the\nfirst pass through the loop and it may point to a deleted subrequest on\nlater passes).\n\nFix the first jump to \"abandon:\" to set subreq to the start of the first\nsubrequest expected to need retry (which, in this abandonment case, turned\nout unexpectedly to no longer have NEED_RETRY set).\n\nAlso clear the subreq pointer after discarding superfluous retryable\nsubrequests to cause an oops if we do try to access it."
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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:R/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 vulnerable netfs retry path processes read results from network filesystem peers such as SMB/CIFS, Ceph, AFS, 9P, and NFS/fscache-backed paths. A malicious or compromised remote filesystem server can drive retry/short-read behavior over the network.\nAC:L - The trigger is retry/abandonment state during ordinary read handling, and a malicious peer can influence short reads, retryable errors, reconnects, or malformed responses. No uncontrollable race or rare memory layout condition is required to reach the vulnerable path.\nPR:N - The attacker can be the remote filesystem peer and needs no privileges on the vulnerable client kernel. Local credentials may be needed by a victim/client to use the mount, but not by the remote attacker.\nUI:R - The client must mount/use the network filesystem and perform or have a process perform a read that reaches the affected netfs path. Opening or reading a file is victim-side interaction.\nS:U - The impact remains within the kernel/client system security authority. This is not a VM escape, IOMMU bypass, or cross-authority boundary escape.\nC:H - The bug can use an uninitialized or stale freed subrequest pointer in list traversal and field access. That kernel memory corruption/use-after-free is defensibly exploitable for information disclosure.\nI:H - The stale subrequest case can write fields and flags through a freed object and continue list traversal from freed memory. This is kernel memory corruption with potential arbitrary write/control-flow impact.\nA:H - Even without full exploitation, dereferencing an uninitialized or freed subrequest pointer can oops or panic the kernel. A malicious peer can repeatedly induce the read retry condition to cause denial of service."
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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/netfs/read_retry.c"
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],
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"versions": [
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{
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"version": "ee4cdf7ba857a894ad1650d6ab77669cbbfa329e",
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"lessThan": "3e5fd8f53b575ff2188f82071da19c977ca56c41",
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"status": "affected",
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{
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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/netfs/read_retry.c"
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],
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"versions": [
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{
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"version": "6.12",
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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": "6.12",
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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": "6.18.21",
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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": "6.19.11",
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"lessThanOrEqual": "6.19.*",
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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": "7.0",
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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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"versionStartIncluding": "6.12",
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"versionEndExcluding": "6.18.21"
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"vulnerable": true,
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/3e5fd8f53b575ff2188f82071da19c977ca56c41"
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},
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{
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"url": "https://git.kernel.org/stable/c/8f2f2bd128a8d9edbc1e785760da54ada3df69b7"
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},
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{
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"url": "https://git.kernel.org/stable/c/7e57523490cd2efb52b1ea97f2e0a74c0fb634cd"
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}
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],
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"title": "netfs: Fix read abandonment during retry",
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-31435",
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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": "2026-10-16T15:09:13.729814Z"
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}
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"problemTypes": [
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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-457",
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"description": "CWE-457 Use of Uninitialized Variable"
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}
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]
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}
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"title": "CISA ADP Vulnrichment",
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