256 lines
12 KiB
JSON
256 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-2026-80866",
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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": "2026-08-26T14:34:25.798Z",
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"datePublished": "2026-09-04T16:48:11.682Z",
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"dateUpdated": "2026-10-30T12:31:21.261Z"
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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": "2026-10-30T12:31:21.261Z"
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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\ntipc: avoid busy looping in tipc_exit_net()\n\nBlamed commit introduced a busy-wait loop in tipc_exit_net()\nto wait for pending UDP bearer cleanup works to complete:\n\n while (atomic_read(&tn->wq_count))\n cond_resched();\n\nThis loop can busy-wait for a long time if cond_resched() is a NOP. This\ntypically happens if the netns exit is executed by a high priority task,\nor under kernels configured without preemption (CONFIG_PREEMPT_NONE). In\nsuch cases, it wastes CPU cycles and can lead to soft lockups.\n\nFix this by replacing the busy loop with wait_var_event(), allowing the\nthread to sleep properly until the work queue count reaches zero.\n\nAccordingly, update cleanup_bearer() to use atomic_dec_and_test() and\nwake_up_var() to wake up the waiter when the count drops to zero.\n\nThis uses the global wait queue hash table, avoiding the need to bloat\nstruct tipc_net with a wait_queue_head_t. The atomic_dec_and_test()\nprovides the necessary memory barrier to ensure the wakeup is not missed."
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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/tipc/core.c",
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"net/tipc/udp_media.c"
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],
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"versions": [
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{
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"version": "04c26faa51d1e2fe71cf13c45791f5174c37f986",
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"lessThan": "772769859226a5b004442403510acb58a1c32e72",
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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": "04c26faa51d1e2fe71cf13c45791f5174c37f986",
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"lessThan": "99b82c8452887408ea908fdfa5df33c4a5dfa88f",
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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": "04c26faa51d1e2fe71cf13c45791f5174c37f986",
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"lessThan": "110bb16d37bdba03213156c0df37e7119c190936",
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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": "04c26faa51d1e2fe71cf13c45791f5174c37f986",
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"lessThan": "7672973957e3e20780afe5937a9fec70b72bc060",
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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": "04c26faa51d1e2fe71cf13c45791f5174c37f986",
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"lessThan": "522d1d950b9e3b68190a6de7534827c8dccedb73",
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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": "04c26faa51d1e2fe71cf13c45791f5174c37f986",
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"lessThan": "c1481c94e74c955e0448ddf46b8615a44d840c1e",
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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": "d1f76dfadaf8f47ed1753f97dbcbd41c16215ffa",
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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": "5195ec5e365a2a9331bfeb585b613a6e94f98dba",
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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": "b9f5b7ad4ac3af006443f535b1ce7bff1d130d7d",
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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": "5.4.124",
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"lessThan": "5.5",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "5.10.42",
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"lessThan": "5.11",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "5.12.9",
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"lessThan": "5.13",
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"status": "affected",
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"versionType": "semver"
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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/tipc/core.c",
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"net/tipc/udp_media.c"
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],
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"versions": [
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{
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"version": "5.13",
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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": "5.13",
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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": "6.1.191",
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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": "6.6.160",
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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": "6.12.114",
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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": "6.18.57",
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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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{
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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": "5.13",
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"versionEndExcluding": "6.1.191"
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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": "5.13",
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"versionEndExcluding": "6.6.160"
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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": "5.13",
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"versionEndExcluding": "6.12.114"
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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": "5.13",
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"versionEndExcluding": "6.18.57"
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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": "5.13",
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"versionEndExcluding": "7.1.5"
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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": "5.13",
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"versionEndExcluding": "7.2"
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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": "5.4.124"
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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": "5.10.42"
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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": "5.12.9"
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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/772769859226a5b004442403510acb58a1c32e72"
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},
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{
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"url": "https://git.kernel.org/stable/c/99b82c8452887408ea908fdfa5df33c4a5dfa88f"
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},
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{
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"url": "https://git.kernel.org/stable/c/110bb16d37bdba03213156c0df37e7119c190936"
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},
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{
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"url": "https://git.kernel.org/stable/c/7672973957e3e20780afe5937a9fec70b72bc060"
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},
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{
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"url": "https://git.kernel.org/stable/c/522d1d950b9e3b68190a6de7534827c8dccedb73"
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},
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{
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"url": "https://git.kernel.org/stable/c/c1481c94e74c955e0448ddf46b8615a44d840c1e"
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}
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],
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"title": "tipc: avoid busy looping in tipc_exit_net()",
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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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} |