{"id":"CVE-2026-68433","title":"libceph: bound get_version reply decode to front len","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: bound get_version reply decode to front len\n\nhandle_get_version_reply() uses msg->front_alloc_len as the decode\nboundary for MON_GET_VERSION_REPLY.  That is th…","severity":"high","cvss":8.6,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 513a8243d67f8e8d27f2883bd2f18bc87c7ca376 < 1307028f082756bf453e1889aee9983d30643a4b","Linux >= 513a8243d67f8e8d27f2883bd2f18bc87c7ca376 < f6cbf6878f3a1503c872ba8f1e69a58ee68d8b2e","Linux >= 513a8243d67f8e8d27f2883bd2f18bc87c7ca376 < 72a35070fcefa229b1b031aa7482ad3788e18f07","Linux >= 513a8243d67f8e8d27f2883bd2f18bc87c7ca376 < 340e0386aa39da181015bee38f309018c335ce16","Linux >= 513a8243d67f8e8d27f2883bd2f18bc87c7ca376 < d60de8253c85a02d0e6194b0735e7a562981a04c","Linux >= 513a8243d67f8e8d27f2883bd2f18bc87c7ca376 < 4e7ebfaa0d14cf50e44041bfde38070d6dbc019f","Linux >= 513a8243d67f8e8d27f2883bd2f18bc87c7ca376 < 0d934c934ec746d53fc7e4f53239792647bbae63","Linux >= 513a8243d67f8e8d27f2883bd2f18bc87c7ca376 < d3c32939fa0e3ee9b883b9a0fd1972c5c444e3d0","Linux 3.16"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-16T15:48:55.526707Z"},"published":"2026-08-12","updated":"2026-10-16","sourceUpdated":"2026-10-16T15:53:13.520Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-68433","references":[{"url":"https://git.kernel.org/stable/c/1307028f082756bf453e1889aee9983d30643a4b"},{"url":"https://git.kernel.org/stable/c/f6cbf6878f3a1503c872ba8f1e69a58ee68d8b2e"},{"url":"https://git.kernel.org/stable/c/72a35070fcefa229b1b031aa7482ad3788e18f07"},{"url":"https://git.kernel.org/stable/c/340e0386aa39da181015bee38f309018c335ce16"},{"url":"https://git.kernel.org/stable/c/d60de8253c85a02d0e6194b0735e7a562981a04c"},{"url":"https://git.kernel.org/stable/c/4e7ebfaa0d14cf50e44041bfde38070d6dbc019f"},{"url":"https://git.kernel.org/stable/c/0d934c934ec746d53fc7e4f53239792647bbae63"},{"url":"https://git.kernel.org/stable/c/d3c32939fa0e3ee9b883b9a0fd1972c5c444e3d0"}],"tags":["cve.org"],"epss":0.00291,"epssPercentile":0.20251,"ingestedAt":"2026-10-16T17:24:46.866Z","slug":"CVE-2026-68433","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: bound get_version reply decode to front len\n\nhandle_get_version_reply() uses msg->front_alloc_len as the decode\nboundary for MON_GET_VERSION_REPLY.  That is the size of the reused\nreply buffer, not the number of bytes actually received.\n\nA truncated reply can therefore pass ceph_decode_need() and decode the\nsecond u64 from stale tail bytes left in the buffer by an earlier\nmessage, causing an uninitialized memory read.\n\nUse msg->front.iov_len as the receive-side decode boundary, matching\nother libceph reply handlers and limiting decoding to the bytes that\nwere actually read from the wire.\n\n## Affected\n\n- `Linux >= 513a8243d67f8e8d27f2883bd2f18bc87c7ca376 < 1307028f082756bf453e1889aee9983d30643a4b`\n- `Linux >= 513a8243d67f8e8d27f2883bd2f18bc87c7ca376 < f6cbf6878f3a1503c872ba8f1e69a58ee68d8b2e`\n- `Linux >= 513a8243d67f8e8d27f2883bd2f18bc87c7ca376 < 72a35070fcefa229b1b031aa7482ad3788e18f07`\n- `Linux >= 513a8243d67f8e8d27f2883bd2f18bc87c7ca376 < 340e0386aa39da181015bee38f309018c335ce16`\n- `Linux >= 513a8243d67f8e8d27f2883bd2f18bc87c7ca376 < d60de8253c85a02d0e6194b0735e7a562981a04c`\n- `Linux >= 513a8243d67f8e8d27f2883bd2f18bc87c7ca376 < 4e7ebfaa0d14cf50e44041bfde38070d6dbc019f`\n- `Linux >= 513a8243d67f8e8d27f2883bd2f18bc87c7ca376 < 0d934c934ec746d53fc7e4f53239792647bbae63`\n- `Linux >= 513a8243d67f8e8d27f2883bd2f18bc87c7ca376 < d3c32939fa0e3ee9b883b9a0fd1972c5c444e3d0`\n- `Linux 3.16`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":47,"depthScoreParts":{"impact":47.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}