170 lines
8.5 KiB
JSON
170 lines
8.5 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-2025-68768",
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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": "2025-12-24T10:30:51.034Z",
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"datePublished": "2026-01-13T15:28:47.106Z",
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"dateUpdated": "2026-06-19T11:57:29.047Z"
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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": "2026-06-19T11:57:29.047Z"
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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\ninet: frags: flush pending skbs in fqdir_pre_exit()\n\nWe have been seeing occasional deadlocks on pernet_ops_rwsem since\nSeptember in NIPA. The stuck task was usually modprobe (often loading\na driver like ipvlan), trying to take the lock as a Writer.\nlockdep does not track readers for rwsems so the read wasn't obvious\nfrom the reports.\n\nOn closer inspection the Reader holding the lock was conntrack looping\nforever in nf_conntrack_cleanup_net_list(). Based on past experience\nwith occasional NIPA crashes I looked thru the tests which run before\nthe crash and noticed that the crash follows ip_defrag.sh. An immediate\nred flag. Scouring thru (de)fragmentation queues reveals skbs sitting\naround, holding conntrack references.\n\nThe problem is that since conntrack depends on nf_defrag_ipv6,\nnf_defrag_ipv6 will load first. Since nf_defrag_ipv6 loads first its\nnetns exit hooks run _after_ conntrack's netns exit hook.\n\nFlush all fragment queue SKBs during fqdir_pre_exit() to release\nconntrack references before conntrack cleanup runs. Also flush\nthe queues in timer expiry handlers when they discover fqdir->dead\nis set, in case packet sneaks in while we're running the pre_exit\nflush.\n\nThe commit under Fixes is not exactly the culprit, but I think\npreviously the timer firing would eventually unblock the spinning\nconntrack."
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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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"include/net/inet_frag.h",
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"include/net/ipv6_frag.h",
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"net/ipv4/inet_fragment.c",
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"net/ipv4/ip_fragment.c"
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],
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"versions": [
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{
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"version": "d5dd88794a13c2f24cce31abad7a0a6c5e0ed2db",
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"lessThan": "22ee4010866da81aeee08e1ea3fddbe418feb212",
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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": "d5dd88794a13c2f24cce31abad7a0a6c5e0ed2db",
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"lessThan": "543555954b1ee8d1903a7020324efb41b0c97428",
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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": "d5dd88794a13c2f24cce31abad7a0a6c5e0ed2db",
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"lessThan": "c70df25214ac9b32b53e18e6ae3b8f073ffa6903",
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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": "d5dd88794a13c2f24cce31abad7a0a6c5e0ed2db",
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"lessThan": "006a5035b495dec008805df249f92c22c89c3d2e",
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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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"include/net/inet_frag.h",
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"include/net/ipv6_frag.h",
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"net/ipv4/inet_fragment.c",
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"net/ipv4/ip_fragment.c"
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],
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"versions": [
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{
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"version": "5.3",
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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": "5.3",
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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": "6.6.143",
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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": "6.12.93",
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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": "6.18.3",
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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",
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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": "5.3",
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"versionEndExcluding": "6.6.143"
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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": "5.3",
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"versionEndExcluding": "6.12.93"
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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": "5.3",
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"versionEndExcluding": "6.18.3"
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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": "5.3",
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"versionEndExcluding": "6.19"
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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/22ee4010866da81aeee08e1ea3fddbe418feb212"
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},
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{
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"url": "https://git.kernel.org/stable/c/543555954b1ee8d1903a7020324efb41b0c97428"
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},
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{
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"url": "https://git.kernel.org/stable/c/c70df25214ac9b32b53e18e6ae3b8f073ffa6903"
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},
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{
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"url": "https://git.kernel.org/stable/c/006a5035b495dec008805df249f92c22c89c3d2e"
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}
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],
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"title": "inet: frags: flush pending skbs in fqdir_pre_exit()",
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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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}
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} |