{"id":"CVE-2026-52928","state":"PUBLISHED","title":"af_unix: Reject SIOCATMARK on non-stream sockets","description":"In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: Reject SIOCATMARK on non-stream sockets\n\nSIOCATMARK reports whether the receive queue is at the urgent mark for\nMSG_OOB.\n\nIn AF_UNIX, MSG_OOB is supported only for SOCK_STREAM sockets.\nSOCK_DGRAM and SOCK_SEQPACKET reject MSG_OOB in sendmsg() and recvmsg(),\nso they should not support SIOCATMARK either.\n\nReturn -EOPNOTSUPP for non-stream sockets before checking the receive\nqueue.","publishedAt":"2026-06-24T07:14:21.367Z","updatedAt":"2026-10-15T01:21:51.788Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"314001f0bf927015e459c9d387d62a231fe93af3","status":"affected","lessThan":"ec123873fdc83e7244c8ed6d17b8f8ea6c416a67","versionType":"git"},{"version":"314001f0bf927015e459c9d387d62a231fe93af3","status":"affected","lessThan":"f085971de6d6b8ef946a5e0bcd73ff24509a0f85","versionType":"git"},{"version":"314001f0bf927015e459c9d387d62a231fe93af3","status":"affected","lessThan":"b741c9c6ef59f17c1f104ddf1217ef77f79ed29b","versionType":"git"},{"version":"314001f0bf927015e459c9d387d62a231fe93af3","status":"affected","lessThan":"645b1ed3259af38b7814242a420bc2081bdd1eb6","versionType":"git"},{"version":"314001f0bf927015e459c9d387d62a231fe93af3","status":"affected","lessThan":"c34c41446acf6c0d13b5b06c809be11e0f7f2729","versionType":"git"},{"version":"314001f0bf927015e459c9d387d62a231fe93af3","status":"affected","lessThan":"3147ddf5a41c20c45c2eb69e00b62f10f822056a","versionType":"git"},{"version":"314001f0bf927015e459c9d387d62a231fe93af3","status":"affected","lessThan":"d119775f2bad827edc28071c061fdd4a91f889a5","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/unix/af_unix.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.15","versionType":"semver"},{"version":"5.15.211","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.177","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.144","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.88","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.30","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.7","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/unix/af_unix.c"]}],"references":["https://git.kernel.org/stable/c/ec123873fdc83e7244c8ed6d17b8f8ea6c416a67","https://git.kernel.org/stable/c/f085971de6d6b8ef946a5e0bcd73ff24509a0f85","https://git.kernel.org/stable/c/b741c9c6ef59f17c1f104ddf1217ef77f79ed29b","https://git.kernel.org/stable/c/645b1ed3259af38b7814242a420bc2081bdd1eb6","https://git.kernel.org/stable/c/c34c41446acf6c0d13b5b06c809be11e0f7f2729","https://git.kernel.org/stable/c/3147ddf5a41c20c45c2eb69e00b62f10f822056a","https://git.kernel.org/stable/c/d119775f2bad827edc28071c061fdd4a91f889a5","https://cert-portal.siemens.com/productcert/html/ssa-784472.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/52xxx/CVE-2026-52928.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52928","state":"PUBLISHED","datePublished":"2026-06-24T07:14:21.367Z","dateUpdated":"2026-10-15T01:21:51.788Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-06-09T07:44:35.368Z"},"containers":{"cna":{"title":"af_unix: Reject SIOCATMARK on non-stream sockets","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: Reject SIOCATMARK on non-stream sockets\n\nSIOCATMARK reports whether the receive queue is at the urgent mark for\nMSG_OOB.\n\nIn AF_UNIX, MSG_OOB is supported only for SOCK_STREAM sockets.\nSOCK_DGRAM and SOCK_SEQPACKET reject MSG_OOB in sendmsg() and recvmsg(),\nso they should not support SIOCATMARK either.\n\nReturn -EOPNOTSUPP for non-stream sockets before checking the receive\nqueue."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"314001f0bf927015e459c9d387d62a231fe93af3","status":"affected","lessThan":"ec123873fdc83e7244c8ed6d17b8f8ea6c416a67","versionType":"git"},{"version":"314001f0bf927015e459c9d387d62a231fe93af3","status":"affected","lessThan":"f085971de6d6b8ef946a5e0bcd73ff24509a0f85","versionType":"git"},{"version":"314001f0bf927015e459c9d387d62a231fe93af3","status":"affected","lessThan":"b741c9c6ef59f17c1f104ddf1217ef77f79ed29b","versionType":"git"},{"version":"314001f0bf927015e459c9d387d62a231fe93af3","status":"affected","lessThan":"645b1ed3259af38b7814242a420bc2081bdd1eb6","versionType":"git"},{"version":"314001f0bf927015e459c9d387d62a231fe93af3","status":"affected","lessThan":"c34c41446acf6c0d13b5b06c809be11e0f7f2729","versionType":"git"},{"version":"314001f0bf927015e459c9d387d62a231fe93af3","status":"affected","lessThan":"3147ddf5a41c20c45c2eb69e00b62f10f822056a","versionType":"git"},{"version":"314001f0bf927015e459c9d387d62a231fe93af3","status":"affected","lessThan":"d119775f2bad827edc28071c061fdd4a91f889a5","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/unix/af_unix.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.15","versionType":"semver"},{"version":"5.15.211","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.177","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.144","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.88","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.30","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.7","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/unix/af_unix.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/ec123873fdc83e7244c8ed6d17b8f8ea6c416a67"},{"url":"https://git.kernel.org/stable/c/f085971de6d6b8ef946a5e0bcd73ff24509a0f85"},{"url":"https://git.kernel.org/stable/c/b741c9c6ef59f17c1f104ddf1217ef77f79ed29b"},{"url":"https://git.kernel.org/stable/c/645b1ed3259af38b7814242a420bc2081bdd1eb6"},{"url":"https://git.kernel.org/stable/c/c34c41446acf6c0d13b5b06c809be11e0f7f2729"},{"url":"https://git.kernel.org/stable/c/3147ddf5a41c20c45c2eb69e00b62f10f822056a"},{"url":"https://git.kernel.org/stable/c/d119775f2bad827edc28071c061fdd4a91f889a5"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-07-04T11:50:47.159Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"5.15.211"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.1.177"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.6.144"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.12.88"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.18.30"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"7.0.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"affected":[{"vendor":"Siemens","product":"SIMATIC 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