{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23139","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-01-13T15:37:45.972Z","datePublished":"2026-02-14T15:22:24.059Z","dateUpdated":"2026-05-11T22:00:53.322Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:00:53.322Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conncount: update last_gc only when GC has been performed\n\nCurrently last_gc is being updated everytime a new connection is\ntracked, that means that it is updated even if a GC wasn't performed.\nWith a sufficiently high packet rate, it is possible to always bypass\nthe GC, causing the list to grow infinitely.\n\nUpdate the last_gc value only when a GC has been actually performed."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nf_conncount.c"],"versions":[{"version":"f106694733c66a48740c25bc4e212e9b2ea364ce","lessThan":"2c7c71113ed6d3e2f3aca4c088f22283016ff34f","status":"affected","versionType":"git"},{"version":"be69850b461e7b491d87a22e33ab76fdd04b725e","lessThan":"c4cde57c8affdcca5bcff53a1047e15d268bdca1","status":"affected","versionType":"git"},{"version":"d265929930e2ffafc744c0ae05fb70acd53be1ee","lessThan":"9f45588993d7f115280fc726119ca86fba32a811","status":"affected","versionType":"git"},{"version":"d265929930e2ffafc744c0ae05fb70acd53be1ee","lessThan":"3cd717359e56f82f06cbf8279b47a7d79880c6f3","status":"affected","versionType":"git"},{"version":"d265929930e2ffafc744c0ae05fb70acd53be1ee","lessThan":"26a82dce2beee39c43c109d9647e16f49cb02a35","status":"affected","versionType":"git"},{"version":"d265929930e2ffafc744c0ae05fb70acd53be1ee","lessThan":"8bdafdf4900040a81422056cabe5e00a37bd101a","status":"affected","versionType":"git"},{"version":"d265929930e2ffafc744c0ae05fb70acd53be1ee","lessThan":"7811ba452402d58628e68faedf38745b3d485e3c","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nf_conncount.c"],"versions":[{"version":"5.19","status":"affected"},{"version":"0","lessThan":"5.19","status":"unaffected","versionType":"semver"},{"version":"6.1.161","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.121","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.66","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.6","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.1.161"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.6.121"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.12.66"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.18.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.19"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/2c7c71113ed6d3e2f3aca4c088f22283016ff34f"},{"url":"https://git.kernel.org/stable/c/c4cde57c8affdcca5bcff53a1047e15d268bdca1"},{"url":"https://git.kernel.org/stable/c/9f45588993d7f115280fc726119ca86fba32a811"},{"url":"https://git.kernel.org/stable/c/3cd717359e56f82f06cbf8279b47a7d79880c6f3"},{"url":"https://git.kernel.org/stable/c/26a82dce2beee39c43c109d9647e16f49cb02a35"},{"url":"https://git.kernel.org/stable/c/8bdafdf4900040a81422056cabe5e00a37bd101a"},{"url":"https://git.kernel.org/stable/c/7811ba452402d58628e68faedf38745b3d485e3c"}],"title":"netfilter: nf_conncount: update last_gc only when GC has been performed","x_generator":{"engine":"bippy-1.2.0"}}}}