248 lines
12 KiB
JSON
248 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-2026-31420",
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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": "2026-03-09T15:48:24.088Z",
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"datePublished": "2026-04-13T13:40:24.594Z",
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"dateUpdated": "2026-09-14T11:58:16.075Z"
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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": "2026-09-14T11:58:16.075Z"
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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\nbridge: mrp: reject zero test interval to avoid OOM panic\n\nbr_mrp_start_test() and br_mrp_start_in_test() accept the user-supplied\ninterval value from netlink without validation. When interval is 0,\nusecs_to_jiffies(0) yields 0, causing the delayed work\n(br_mrp_test_work_expired / br_mrp_in_test_work_expired) to reschedule\nitself with zero delay. This creates a tight loop on system_percpu_wq\nthat allocates and transmits MRP test frames at maximum rate, exhausting\nall system memory and causing a kernel panic via OOM deadlock.\n\nThe same zero-interval issue applies to br_mrp_start_in_test_parse()\nfor interconnect test frames.\n\nUse NLA_POLICY_MIN(NLA_U32, 1) in the nla_policy tables for both\nIFLA_BRIDGE_MRP_START_TEST_INTERVAL and\nIFLA_BRIDGE_MRP_START_IN_TEST_INTERVAL, so zero is rejected at the\nnetlink attribute parsing layer before the value ever reaches the\nworkqueue scheduling code. This is consistent with how other bridge\nsubsystems (br_fdb, br_mst) enforce range constraints on netlink\nattributes."
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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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"net/bridge/br_mrp_netlink.c"
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],
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"versions": [
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{
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"version": "20f6a05ef63594feb0c6dfbd629da0448b43124d",
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"lessThan": "610073ffb77ffd2b5eca182d2ac264de4834a175",
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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": "20f6a05ef63594feb0c6dfbd629da0448b43124d",
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"lessThan": "ec8850be9b2b3beac1c7967d95f169dd2785979d",
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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": "20f6a05ef63594feb0c6dfbd629da0448b43124d",
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"lessThan": "1ec86b4b9e28170a2565cf36f0e6e2b96b55134d",
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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": "20f6a05ef63594feb0c6dfbd629da0448b43124d",
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"lessThan": "2120bd8546cd6a63c558d135773aa8f41c8259fc",
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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": "20f6a05ef63594feb0c6dfbd629da0448b43124d",
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"lessThan": "630a15a31c2034b5b697f4aabc769b9d80d82446",
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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": "20f6a05ef63594feb0c6dfbd629da0448b43124d",
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"lessThan": "e8ec80430bfa520e7352155d6ac632e527cba7aa",
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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": "20f6a05ef63594feb0c6dfbd629da0448b43124d",
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"lessThan": "c9bc352f716d1bebfe43354bce539ec2d0223b30",
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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": "20f6a05ef63594feb0c6dfbd629da0448b43124d",
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"lessThan": "fa6e24963342de4370e3a3c9af41e38277b74cf3",
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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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"net/bridge/br_mrp_netlink.c"
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],
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"versions": [
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{
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"version": "5.8",
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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": "5.8",
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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": "5.10.270",
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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": "5.15.221",
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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": "6.1.188",
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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": "6.6.157",
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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": "6.12.92",
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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": "6.18.34",
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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": "6.19.12",
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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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{
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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": "5.8",
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"versionEndExcluding": "5.10.270"
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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": "5.8",
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"versionEndExcluding": "5.15.221"
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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": "5.8",
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"versionEndExcluding": "6.1.188"
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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": "5.8",
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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": "5.8",
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"versionEndExcluding": "6.12.92"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.8",
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"versionEndExcluding": "6.18.34"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.8",
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"versionEndExcluding": "6.19.12"
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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": "5.8",
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"versionEndExcluding": "7.0"
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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/610073ffb77ffd2b5eca182d2ac264de4834a175"
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},
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{
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"url": "https://git.kernel.org/stable/c/ec8850be9b2b3beac1c7967d95f169dd2785979d"
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},
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{
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"url": "https://git.kernel.org/stable/c/1ec86b4b9e28170a2565cf36f0e6e2b96b55134d"
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},
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{
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"url": "https://git.kernel.org/stable/c/2120bd8546cd6a63c558d135773aa8f41c8259fc"
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},
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{
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"url": "https://git.kernel.org/stable/c/630a15a31c2034b5b697f4aabc769b9d80d82446"
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},
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{
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"url": "https://git.kernel.org/stable/c/e8ec80430bfa520e7352155d6ac632e527cba7aa"
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},
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{
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"url": "https://git.kernel.org/stable/c/c9bc352f716d1bebfe43354bce539ec2d0223b30"
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},
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{
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"url": "https://git.kernel.org/stable/c/fa6e24963342de4370e3a3c9af41e38277b74cf3"
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}
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],
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"title": "bridge: mrp: reject zero test interval to avoid OOM panic",
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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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} |