185 lines
9.3 KiB
JSON
185 lines
9.3 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-2026-43086",
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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": "2026-05-01T14:12:55.983Z",
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"datePublished": "2026-05-06T07:40:20.631Z",
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"dateUpdated": "2026-05-11T22:17:27.288Z"
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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": "2026-05-11T22:17:27.288Z"
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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\nipvs: fix NULL deref in ip_vs_add_service error path\n\nWhen ip_vs_bind_scheduler() succeeds in ip_vs_add_service(), the local\nvariable sched is set to NULL. If ip_vs_start_estimator() subsequently\nfails, the out_err cleanup calls ip_vs_unbind_scheduler(svc, sched)\nwith sched == NULL. ip_vs_unbind_scheduler() passes the cur_sched NULL\ncheck (because svc->scheduler was set by the successful bind) but then\ndereferences the NULL sched parameter at sched->done_service, causing a\nkernel panic at offset 0x30 from NULL.\n\n Oops: general protection fault, [..] [#1] PREEMPT SMP KASAN NOPTI\n KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]\n RIP: 0010:ip_vs_unbind_scheduler (net/netfilter/ipvs/ip_vs_sched.c:69)\n Call Trace:\n <TASK>\n ip_vs_add_service.isra.0 (net/netfilter/ipvs/ip_vs_ctl.c:1500)\n do_ip_vs_set_ctl (net/netfilter/ipvs/ip_vs_ctl.c:2809)\n nf_setsockopt (net/netfilter/nf_sockopt.c:102)\n [..]\n\nFix by simply not clearing the local sched variable after a successful\nbind. ip_vs_unbind_scheduler() already detects whether a scheduler is\ninstalled via svc->scheduler, and keeping sched non-NULL ensures the\nerror path passes the correct pointer to both ip_vs_unbind_scheduler()\nand ip_vs_scheduler_put().\n\nWhile the bug is older, the problem popups in more recent kernels (6.2),\nwhen the new error path is taken after the ip_vs_start_estimator() call."
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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/netfilter/ipvs/ip_vs_ctl.c"
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],
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"versions": [
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{
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"version": "705dd34440812735ece298eb5bc153fde9544d42",
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"lessThan": "730663352c9178f33fcf5929f4a37c1f1ca5a693",
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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": "705dd34440812735ece298eb5bc153fde9544d42",
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"lessThan": "4039959315008888dd53c37674d33351817a5166",
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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": "705dd34440812735ece298eb5bc153fde9544d42",
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"lessThan": "a32dabacee111cea083ddd57a03635672e1bff29",
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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": "705dd34440812735ece298eb5bc153fde9544d42",
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"lessThan": "c2ddbe577e2ebf63f2d8fb15cdc7503af70f3e94",
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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": "705dd34440812735ece298eb5bc153fde9544d42",
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"lessThan": "9a91797e61d286805ae10a92cc48959c30800556",
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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/netfilter/ipvs/ip_vs_ctl.c"
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],
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"versions": [
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{
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"version": "6.2",
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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": "6.2",
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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": "6.6.136",
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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": "6.12.83",
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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": "6.18.24",
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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": "6.19.14",
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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": "6.2",
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"versionEndExcluding": "6.6.136"
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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": "6.2",
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"versionEndExcluding": "6.12.83"
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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": "6.2",
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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/730663352c9178f33fcf5929f4a37c1f1ca5a693"
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},
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{
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"url": "https://git.kernel.org/stable/c/4039959315008888dd53c37674d33351817a5166"
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},
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{
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"url": "https://git.kernel.org/stable/c/a32dabacee111cea083ddd57a03635672e1bff29"
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},
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{
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"url": "https://git.kernel.org/stable/c/c2ddbe577e2ebf63f2d8fb15cdc7503af70f3e94"
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},
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{
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"url": "https://git.kernel.org/stable/c/9a91797e61d286805ae10a92cc48959c30800556"
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}
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],
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"title": "ipvs: fix NULL deref in ip_vs_add_service error path",
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} |