{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-68160", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-68160", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-08-10T11:59:26.741Z", "updatedAt": "2026-10-19T20:58:55.403Z", "importedAt": "2026-10-24T01:58:25.636Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "ceph: fix pre-auth out-of-bounds read on snaptrace in ceph_handle_caps()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nceph: fix pre-auth out-of-bounds read on snaptrace in ceph_handle_caps()\n\nceph_handle_caps() reads snap_trace_len from the wire-format\nceph_mds_caps header and uses it unconditionally to build a fake\nend pointer (snaptrace + snaptrace_len) that is later handed to\nceph_update_snap_trace() in the CEPH_CAP_OP_IMPORT case:\n\n snaptrace = h + 1;\n snaptrace_len = le32_to_cpu(h->snap_trace_len);\n p = snaptrace + snaptrace_len;\n ...\n case CEPH_CAP_OP_IMPORT:\n if (snaptrace_len) {\n ...\n if (ceph_update_snap_trace(mdsc, snaptrace,\n snaptrace + snaptrace_len,\n false, &realm)) { ... }\n\nceph_update_snap_trace() then decodes a struct ceph_mds_snap_realm\nfrom snaptrace using ceph_decode_need(&p, e, sizeof(*ri), bad)\nwith the attacker-supplied fake end e == snaptrace + snaptrace_len.\nWith snaptrace_len == 0xFFFFFFFF the bound check is trivially\nsatisfied, ri = p reads sizeof(struct ceph_mds_snap_realm) past\nthe legitimate msg->front buffer, and ri->num_snaps /\nri->num_prior_parent_snaps then drive further out-of-bounds\nreads of the encoded snap arrays.\n\nThe eleven msg_version >= 2 .. msg_version >= 12 decoder blocks\nabove the op switch each catch this OOB through their\nceph_decode_*_safe() / ceph_decode_need() helpers, but they sit\nbehind a hdr.version-gated if, so a malicious or compromised\nMDS that sets msg->hdr.version = 1 reaches the IMPORT path with\nno version-gated decoder having validated snap_trace_len. The\nshape has been present since ceph_handle_caps() was introduced.\n\nValidate snap_trace_len against the message front buffer before\nconsuming it, using the canonical ceph_decode_need() / ceph_has_room()\nhelper. The helper bounds the length with subtraction (n <= end - p,\nguarded by end >= p) rather than pointer addition, so it is wrap-safe\nfor the attacker-controlled u32 length on 32-bit builds where\np + snap_trace_len could overflow the address space. This matches the\nrest of the ceph decode path (e.g. the pool_ns_len check a few lines\nbelow), and the existing goto bad cleanup already covers this exit\npath.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "a8599bd821d084d04a3290fffae1071624ec00ea", "status": "affected", "versionType": "git", "lessThan": "f913192fc782288e060dafc329b2346934be34cc" }, { "version": "a8599bd821d084d04a3290fffae1071624ec00ea", "status": "affected", "versionType": "git", "lessThan": "0c011137194036424e974677e0f1592e22a33d8c" }, { "version": "a8599bd821d084d04a3290fffae1071624ec00ea", "status": "affected", "versionType": "git", "lessThan": "cc93f68a31c9b831abf2db8647b5f5b10329d793" }, { "version": "a8599bd821d084d04a3290fffae1071624ec00ea", "status": "affected", "versionType": "git", "lessThan": "9081c71796724ffe96cba253f68fbe42363c5295" }, { "version": "a8599bd821d084d04a3290fffae1071624ec00ea", "status": "affected", "versionType": "git", "lessThan": "03b417afce19ee6b6e61f1bbbbebac924c9f36d1" }, { "version": "a8599bd821d084d04a3290fffae1071624ec00ea", "status": "affected", "versionType": "git", "lessThan": "a4228b93706fb74a484e6ffb271c1cc2af3a2ddb" }, { "version": "a8599bd821d084d04a3290fffae1071624ec00ea", "status": "affected", "versionType": "git", "lessThan": "71893c342a26bcff92eaab0b2b75d64aed19308a" }, { "version": "a8599bd821d084d04a3290fffae1071624ec00ea", "status": "affected", "versionType": "git", "lessThan": "4dbc71bcaf9a30abf3920a4e2cc4ed33bba78c02" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "2.6.34", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "2.6.34" }, { "version": "5.10.265", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.216", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.183", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.148", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.101", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.42", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.1.6", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.1.*" }, { "version": "7.2", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }