{"id":"CVE-2026-52928","title":"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…","summary":"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…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 5.15, < 5.15.211","linux_kernel >= 5.16, < 6.1.177","linux_kernel >= 6.2, < 6.6.144","linux_kernel >= 6.7, < 6.12.88","linux_kernel >= 6.13, < 6.18.30","linux_kernel >= 6.19, < 7.0.7","linux_kernel = 7.1"],"patched":["linux_kernel 7.0.7"],"published":"2026-06-24","updated":"2026-10-15","sourceUpdated":"2026-10-15T02:19:57.080","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-52928","references":[{"url":"https://git.kernel.org/stable/c/3147ddf5a41c20c45c2eb69e00b62f10f822056a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/645b1ed3259af38b7814242a420bc2081bdd1eb6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b741c9c6ef59f17c1f104ddf1217ef77f79ed29b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c34c41446acf6c0d13b5b06c809be11e0f7f2729","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d119775f2bad827edc28071c061fdd4a91f889a5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ec123873fdc83e7244c8ed6d17b8f8ea6c416a67","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f085971de6d6b8ef946a5e0bcd73ff24509a0f85","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-784472.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00114,"epssPercentile":0.01486,"ingestedAt":"2026-07-04T12:56:09.609Z","slug":"CVE-2026-52928","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `linux_kernel >= 5.15, < 5.15.211`\n- `linux_kernel >= 5.16, < 6.1.177`\n- `linux_kernel >= 6.2, < 6.6.144`\n- `linux_kernel >= 6.7, < 6.12.88`\n- `linux_kernel >= 6.13, < 6.18.30`\n- `linux_kernel >= 6.19, < 7.0.7`\n- `linux_kernel = 7.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 7.0.7`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":221763,"id":"CVE-2026-52928","ts":1792035402976,"field":"cvss","old":null,"new":"5.5"},{"seq":221762,"id":"CVE-2026-52928","ts":1792035402976,"field":"severity","old":"none","new":"medium"}]}