{"id":"CVE-2026-80992","title":"net: ravb: avoid dereferencing an invalid PTP clock","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ravb: avoid dereferencing an invalid PTP clock\n\nThe PTP clock is unavailable before the first open, so querying its\nindex can dereference a NULL pointer. Registrat…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-476"],"vendor":"Linux","product":"Linux","affected":["Linux >= a0d2f20650e81407d8e51ad2cbdc492861c74e9c < 29ffd972531f8e6e0edf4ea3496190acff9fc9c2","Linux >= a0d2f20650e81407d8e51ad2cbdc492861c74e9c < bf3308416a2be85dcc9965b614a745b40beeff14","Linux >= a0d2f20650e81407d8e51ad2cbdc492861c74e9c < fc710f89a644e030a7ca15343176ca862fd61b9d","Linux >= a0d2f20650e81407d8e51ad2cbdc492861c74e9c < 8d4d06d6e2b501cb8e30ed3b1924c470358e8052","Linux >= a0d2f20650e81407d8e51ad2cbdc492861c74e9c < 0aaa53936419cf0c19c670387fc6d431e042a1b6","Linux >= a0d2f20650e81407d8e51ad2cbdc492861c74e9c < 1f77af0aaf277413ff32f6ff8c2c4282bd64c897","Linux 4.2"],"published":"2026-09-11","updated":"2026-10-19","sourceUpdated":"2026-10-19T08:46:16.688Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80992","references":[{"url":"https://git.kernel.org/stable/c/29ffd972531f8e6e0edf4ea3496190acff9fc9c2"},{"url":"https://git.kernel.org/stable/c/bf3308416a2be85dcc9965b614a745b40beeff14"},{"url":"https://git.kernel.org/stable/c/fc710f89a644e030a7ca15343176ca862fd61b9d"},{"url":"https://git.kernel.org/stable/c/8d4d06d6e2b501cb8e30ed3b1924c470358e8052"},{"url":"https://git.kernel.org/stable/c/0aaa53936419cf0c19c670387fc6d431e042a1b6"},{"url":"https://git.kernel.org/stable/c/1f77af0aaf277413ff32f6ff8c2c4282bd64c897"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80992.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80992"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532047"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80992"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80992"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80992.mbox"}],"tags":["cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00169,"epssPercentile":0.06191,"scores":{"cna":7.8,"vendor":5.5},"ingestedAt":"2026-09-14T15:23:07.454Z","slug":"CVE-2026-80992","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet: ravb: avoid dereferencing an invalid PTP clock\n\nThe PTP clock is unavailable before the first open, so querying its\nindex can dereference a NULL pointer. Registration failures can also\nleave an error pointer in priv->ptp.clock.\n\nCache the PHC index separately and report -1 while no clock is\nregistered. Normalize registration errors to NULL and preserve the\nstatic timestamping capabilities.\n\n## Affected\n\n- `Linux >= a0d2f20650e81407d8e51ad2cbdc492861c74e9c < 29ffd972531f8e6e0edf4ea3496190acff9fc9c2`\n- `Linux >= a0d2f20650e81407d8e51ad2cbdc492861c74e9c < bf3308416a2be85dcc9965b614a745b40beeff14`\n- `Linux >= a0d2f20650e81407d8e51ad2cbdc492861c74e9c < fc710f89a644e030a7ca15343176ca862fd61b9d`\n- `Linux >= a0d2f20650e81407d8e51ad2cbdc492861c74e9c < 8d4d06d6e2b501cb8e30ed3b1924c470358e8052`\n- `Linux >= a0d2f20650e81407d8e51ad2cbdc492861c74e9c < 0aaa53936419cf0c19c670387fc6d431e042a1b6`\n- `Linux >= a0d2f20650e81407d8e51ad2cbdc492861c74e9c < 1f77af0aaf277413ff32f6ff8c2c4282bd64c897`\n- `Linux 4.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80992.json)","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":224788,"id":"CVE-2026-80992","ts":1792401542414,"field":"cvss","old":"5.5","new":"7.8"},{"seq":224787,"id":"CVE-2026-80992","ts":1792401542414,"field":"severity","old":"medium","new":"high"},{"seq":204231,"id":"CVE-2026-80992","ts":1789490240422,"field":"cvss","old":"7.8","new":"5.5"},{"seq":204230,"id":"CVE-2026-80992","ts":1789490240422,"field":"severity","old":"high","new":"medium"},{"seq":183580,"id":"CVE-2026-80992","ts":1789356675968,"field":"cvss","old":"7.8","new":"5.9"},{"seq":183579,"id":"CVE-2026-80992","ts":1789356675968,"field":"severity","old":"high","new":"medium"},{"seq":153180,"id":"CVE-2026-80992","ts":1789285349431,"field":"cvss","old":null,"new":"7.8"},{"seq":153179,"id":"CVE-2026-80992","ts":1789285349431,"field":"severity","old":"none","new":"high"},{"seq":109578,"id":"CVE-2026-80992","ts":1789183732487,"field":"cvss","old":null,"new":"5.9"},{"seq":109577,"id":"CVE-2026-80992","ts":1789183732487,"field":"severity","old":"none","new":"medium"}]}