{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-39848","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-04-16T07:20:57.142Z","datePublished":"2025-09-19T15:26:21.403Z","dateUpdated":"2026-05-12T12:07:37.114Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:37:36.761Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nax25: properly unshare skbs in ax25_kiss_rcv()\n\nBernard Pidoux reported a regression apparently caused by commit\nc353e8983e0d (\"net: introduce per netns packet chains\").\n\nskb->dev becomes NULL and we crash in __netif_receive_skb_core().\n\nBefore above commit, different kind of bugs or corruptions could happen\nwithout a major crash.\n\nBut the root cause is that ax25_kiss_rcv() can queue/mangle input skb\nwithout checking if this skb is shared or not.\n\nMany thanks to Bernard Pidoux for his help, diagnosis and tests.\n\nWe had a similar issue years ago fixed with commit 7aaed57c5c28\n(\"phonet: properly unshare skbs in phonet_rcv()\")."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ax25/ax25_in.c"],"versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"42b46684e2c78ee052d8c2ee8d9c2089233c9094","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"5b079be1b9da49ad88fc304c874d4be7085f7883","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"2bd0f67212908243ce88e35bf69fa77155b47b14","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"01a2984cb803f2d487b7074f9718db2bf3531f69","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"7d449b7a6c8ee434d10a483feed7c5c50108cf56","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"89064cf534bea4bb28c83fe6bbb26657b19dd5fe","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"b1c71d674a308d2fbc83efcf88bfc4217a86aa17","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"8156210d36a43e76372312c87eb5ea3dbb405a85","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/ax25/ax25_in.c"],"versions":[{"version":"2.6.12","status":"affected"},{"version":"0","lessThan":"2.6.12","status":"unaffected","versionType":"semver"},{"version":"5.4.299","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.243","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.192","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.151","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.105","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.46","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.16.6","lessThanOrEqual":"6.16.*","status":"unaffected","versionType":"semver"},{"version":"6.17","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":"2.6.12","versionEndExcluding":"5.4.299"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.10.243"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.15.192"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.1.151"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.6.105"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.12.46"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.16.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.17"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/42b46684e2c78ee052d8c2ee8d9c2089233c9094"},{"url":"https://git.kernel.org/stable/c/5b079be1b9da49ad88fc304c874d4be7085f7883"},{"url":"https://git.kernel.org/stable/c/2bd0f67212908243ce88e35bf69fa77155b47b14"},{"url":"https://git.kernel.org/stable/c/01a2984cb803f2d487b7074f9718db2bf3531f69"},{"url":"https://git.kernel.org/stable/c/7d449b7a6c8ee434d10a483feed7c5c50108cf56"},{"url":"https://git.kernel.org/stable/c/89064cf534bea4bb28c83fe6bbb26657b19dd5fe"},{"url":"https://git.kernel.org/stable/c/b1c71d674a308d2fbc83efcf88bfc4217a86aa17"},{"url":"https://git.kernel.org/stable/c/8156210d36a43e76372312c87eb5ea3dbb405a85"}],"title":"ax25: properly unshare skbs in ax25_kiss_rcv()","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"},{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2025-11-03T17:44:06.959Z"}},{"x_adpType":"supplier","providerMetadata":{"orgId":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","shortName":"siemens-SADP","dateUpdated":"2026-05-12T12:07:37.114Z"},"affected":[{"vendor":"Siemens","product":"SIMATIC CN 4100","versions":[{"status":"affected","version":"0","lessThan":"V5.0","versionType":"custom"}],"defaultStatus":"unknown"}],"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-032379.html"}]}]}}