{"id":"CVE-2026-98235","state":"PUBLISHED","title":"net/sched: act_api: release tail references on DELACTION failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_api: release tail references on DELACTION failure\n\nA batched RTM_DELACTION request takes a temporary reference on each\naction before attempting any deletion. tcf_action_delete() clears\neach processed slot and drops its temporary reference before attempting\nthe deletion. If deletion fails, tca_action_gd() calls\ntcf_action_put_many() to release the remaining references, but its\ntcf_act_for_each_action() iterator stops at the first NULL slot.\n\nWhen a batch stops at an action bound to a filter, this leaks a\nreference on each subsequent action. A later delete of an unbound\naction can then return success without removing it from the IDR.\n\nWalk the full array in tcf_action_put_many() and skip NULL slots to\nrelease the references held on the unprocessed actions.","publishedAt":"2026-10-06T08:45:07.909Z","updatedAt":"2026-10-19T09:16:07.068Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a0e947c9ccffe47d45aca793d9e7fe4f4494e381","status":"affected","lessThan":"9eaba16f1b6ee19b249e6afd82c27f958d441458","versionType":"git"},{"version":"a0e947c9ccffe47d45aca793d9e7fe4f4494e381","status":"affected","lessThan":"1be63e4579af408d596f0f3165faf1a880631d3b","versionType":"git"},{"version":"a0e947c9ccffe47d45aca793d9e7fe4f4494e381","status":"affected","lessThan":"57b477e46ef2df3483f3488cc713c61c4b384aab","versionType":"git"},{"version":"a0e947c9ccffe47d45aca793d9e7fe4f4494e381","status":"affected","lessThan":"6e05e46fa821a5c1b281355f1f622ac76cb6080a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/act_api.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.8","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/act_api.c"]}],"references":["https://git.kernel.org/stable/c/9eaba16f1b6ee19b249e6afd82c27f958d441458","https://git.kernel.org/stable/c/1be63e4579af408d596f0f3165faf1a880631d3b","https://git.kernel.org/stable/c/57b477e46ef2df3483f3488cc713c61c4b384aab","https://git.kernel.org/stable/c/6e05e46fa821a5c1b281355f1f622ac76cb6080a"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98235.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98235","state":"PUBLISHED","datePublished":"2026-10-06T08:45:07.909Z","dateUpdated":"2026-10-19T09:16:07.068Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.329Z"},"containers":{"cna":{"title":"net/sched: act_api: release tail references on DELACTION failure","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_api: release tail references on DELACTION failure\n\nA batched RTM_DELACTION request takes a temporary reference on each\naction before attempting any deletion. tcf_action_delete() clears\neach processed slot and drops its temporary reference before attempting\nthe deletion. If deletion fails, tca_action_gd() calls\ntcf_action_put_many() to release the remaining references, but its\ntcf_act_for_each_action() iterator stops at the first NULL slot.\n\nWhen a batch stops at an action bound to a filter, this leaks a\nreference on each subsequent action. A later delete of an unbound\naction can then return success without removing it from the IDR.\n\nWalk the full array in tcf_action_put_many() and skip NULL slots to\nrelease the references held on the unprocessed actions."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a0e947c9ccffe47d45aca793d9e7fe4f4494e381","status":"affected","lessThan":"9eaba16f1b6ee19b249e6afd82c27f958d441458","versionType":"git"},{"version":"a0e947c9ccffe47d45aca793d9e7fe4f4494e381","status":"affected","lessThan":"1be63e4579af408d596f0f3165faf1a880631d3b","versionType":"git"},{"version":"a0e947c9ccffe47d45aca793d9e7fe4f4494e381","status":"affected","lessThan":"57b477e46ef2df3483f3488cc713c61c4b384aab","versionType":"git"},{"version":"a0e947c9ccffe47d45aca793d9e7fe4f4494e381","status":"affected","lessThan":"6e05e46fa821a5c1b281355f1f622ac76cb6080a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/act_api.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.8","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/act_api.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/9eaba16f1b6ee19b249e6afd82c27f958d441458"},{"url":"https://git.kernel.org/stable/c/1be63e4579af408d596f0f3165faf1a880631d3b"},{"url":"https://git.kernel.org/stable/c/57b477e46ef2df3483f3488cc713c61c4b384aab"},{"url":"https://git.kernel.org/stable/c/6e05e46fa821a5c1b281355f1f622ac76cb6080a"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:16:07.068Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.18.54"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"7.2.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}