{"id":"CVE-2026-23442","state":"PUBLISHED","title":"ipv6: add NULL checks for idev in SRv6 paths","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: add NULL checks for idev in SRv6 paths\n\n__in6_dev_get() can return NULL when the device has no IPv6 configuration\n(e.g. MTU < IPV6_MIN_MTU or after NETDEV_UNREGISTER).\n\nAdd NULL checks for idev returned by __in6_dev_get() in both\nseg6_hmac_validate_skb() and ipv6_srh_rcv() to prevent potential NULL\npointer dereferences.","publishedAt":"2026-04-03T15:15:26.851Z","updatedAt":"2026-10-15T01:15:04.465Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1ababeba4a21f3dba3da3523c670b207fb2feb62","status":"affected","lessThan":"0348fa0ada37cef7c6b5ab2a428bb2c6aee784e4","versionType":"git"},{"version":"1ababeba4a21f3dba3da3523c670b207fb2feb62","status":"affected","lessThan":"83d705d35e583cb1b1eacf196dfe7b77d442018e","versionType":"git"},{"version":"1ababeba4a21f3dba3da3523c670b207fb2feb62","status":"affected","lessThan":"d1bd8b9edc6752d10f84d28ff64f842401ce336d","versionType":"git"},{"version":"1ababeba4a21f3dba3da3523c670b207fb2feb62","status":"affected","lessThan":"50352fc103928e10e8729abc79a0d05abef26c4d","versionType":"git"},{"version":"1ababeba4a21f3dba3da3523c670b207fb2feb62","status":"affected","lessThan":"bc9843c39f9932a8b36efd1d362ea00bb88e4e78","versionType":"git"},{"version":"1ababeba4a21f3dba3da3523c670b207fb2feb62","status":"affected","lessThan":"c5cedee5d97382176573bbe21e1724e737a5eb64","versionType":"git"},{"version":"1ababeba4a21f3dba3da3523c670b207fb2feb62","status":"affected","lessThan":"a25853c9feea7bbf31d157ff6e004d2d3b4f7f13","versionType":"git"},{"version":"1ababeba4a21f3dba3da3523c670b207fb2feb62","status":"affected","lessThan":"06413793526251870e20402c39930804f14d59c0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/exthdrs.c","net/ipv6/seg6_hmac.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.10","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.136","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.83","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.25","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.10","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/exthdrs.c","net/ipv6/seg6_hmac.c"]}],"references":["https://git.kernel.org/stable/c/0348fa0ada37cef7c6b5ab2a428bb2c6aee784e4","https://git.kernel.org/stable/c/83d705d35e583cb1b1eacf196dfe7b77d442018e","https://git.kernel.org/stable/c/d1bd8b9edc6752d10f84d28ff64f842401ce336d","https://git.kernel.org/stable/c/50352fc103928e10e8729abc79a0d05abef26c4d","https://git.kernel.org/stable/c/bc9843c39f9932a8b36efd1d362ea00bb88e4e78","https://git.kernel.org/stable/c/c5cedee5d97382176573bbe21e1724e737a5eb64","https://git.kernel.org/stable/c/a25853c9feea7bbf31d157ff6e004d2d3b4f7f13","https://git.kernel.org/stable/c/06413793526251870e20402c39930804f14d59c0","https://cert-portal.siemens.com/productcert/html/ssa-784472.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/23xxx/CVE-2026-23442.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23442","state":"PUBLISHED","datePublished":"2026-04-03T15:15:26.851Z","dateUpdated":"2026-10-15T01:15:04.465Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-01-13T15:37:46.018Z"},"containers":{"cna":{"title":"ipv6: add NULL checks for idev in SRv6 paths","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: add NULL checks for idev in SRv6 paths\n\n__in6_dev_get() can return NULL when the device has no IPv6 configuration\n(e.g. MTU < IPV6_MIN_MTU or after NETDEV_UNREGISTER).\n\nAdd NULL checks for idev returned by __in6_dev_get() in both\nseg6_hmac_validate_skb() and ipv6_srh_rcv() to prevent potential NULL\npointer dereferences."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1ababeba4a21f3dba3da3523c670b207fb2feb62","status":"affected","lessThan":"0348fa0ada37cef7c6b5ab2a428bb2c6aee784e4","versionType":"git"},{"version":"1ababeba4a21f3dba3da3523c670b207fb2feb62","status":"affected","lessThan":"83d705d35e583cb1b1eacf196dfe7b77d442018e","versionType":"git"},{"version":"1ababeba4a21f3dba3da3523c670b207fb2feb62","status":"affected","lessThan":"d1bd8b9edc6752d10f84d28ff64f842401ce336d","versionType":"git"},{"version":"1ababeba4a21f3dba3da3523c670b207fb2feb62","status":"affected","lessThan":"50352fc103928e10e8729abc79a0d05abef26c4d","versionType":"git"},{"version":"1ababeba4a21f3dba3da3523c670b207fb2feb62","status":"affected","lessThan":"bc9843c39f9932a8b36efd1d362ea00bb88e4e78","versionType":"git"},{"version":"1ababeba4a21f3dba3da3523c670b207fb2feb62","status":"affected","lessThan":"c5cedee5d97382176573bbe21e1724e737a5eb64","versionType":"git"},{"version":"1ababeba4a21f3dba3da3523c670b207fb2feb62","status":"affected","lessThan":"a25853c9feea7bbf31d157ff6e004d2d3b4f7f13","versionType":"git"},{"version":"1ababeba4a21f3dba3da3523c670b207fb2feb62","status":"affected","lessThan":"06413793526251870e20402c39930804f14d59c0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/exthdrs.c","net/ipv6/seg6_hmac.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.10","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.136","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.83","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.25","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.10","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/exthdrs.c","net/ipv6/seg6_hmac.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/0348fa0ada37cef7c6b5ab2a428bb2c6aee784e4"},{"url":"https://git.kernel.org/stable/c/83d705d35e583cb1b1eacf196dfe7b77d442018e"},{"url":"https://git.kernel.org/stable/c/d1bd8b9edc6752d10f84d28ff64f842401ce336d"},{"url":"https://git.kernel.org/stable/c/50352fc103928e10e8729abc79a0d05abef26c4d"},{"url":"https://git.kernel.org/stable/c/bc9843c39f9932a8b36efd1d362ea00bb88e4e78"},{"url":"https://git.kernel.org/stable/c/c5cedee5d97382176573bbe21e1724e737a5eb64"},{"url":"https://git.kernel.org/stable/c/a25853c9feea7bbf31d157ff6e004d2d3b4f7f13"},{"url":"https://git.kernel.org/stable/c/06413793526251870e20402c39930804f14d59c0"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-01T16:11:11.872Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"5.10.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"6.6.136"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"6.12.83"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"6.18.25"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"6.19.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"affected":[{"vendor":"Siemens","product":"SIMATIC 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