{"id":"CVE-2026-22984","state":"PUBLISHED","title":"libceph: prevent potential out-of-bounds reads in handle_auth_done()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: prevent potential out-of-bounds reads in handle_auth_done()\n\nPerform an explicit bounds check on payload_len to avoid a possible\nout-of-bounds access in the callout.\n\n[ idryomov: changelog ]","publishedAt":"2026-01-23T15:24:06.245Z","updatedAt":"2026-10-19T18:25:26.154Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","status":"affected","lessThan":"194cfe2af4d2a1de599d39dad636b47c2f6c2c96","versionType":"git"},{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","status":"affected","lessThan":"79fe3511db416d2f2edcfd93569807cb02736e5e","versionType":"git"},{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","status":"affected","lessThan":"ef208ea331ef688729f64089b895ed1b49e842e3","versionType":"git"},{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","status":"affected","lessThan":"2802ef3380fa8c4a08cda51ec1f085b1a712e9e2","versionType":"git"},{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","status":"affected","lessThan":"2d653bb63d598ae4b096dd678744bdcc34ee89e8","versionType":"git"},{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","status":"affected","lessThan":"818156caffbf55cb4d368f9c3cac64e458fb49c9","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ceph/messenger_v2.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.11","versionType":"semver"},{"version":"5.15.198","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.161","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.121","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.66","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.6","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ceph/messenger_v2.c"]}],"references":["https://git.kernel.org/stable/c/194cfe2af4d2a1de599d39dad636b47c2f6c2c96","https://git.kernel.org/stable/c/79fe3511db416d2f2edcfd93569807cb02736e5e","https://git.kernel.org/stable/c/ef208ea331ef688729f64089b895ed1b49e842e3","https://git.kernel.org/stable/c/2802ef3380fa8c4a08cda51ec1f085b1a712e9e2","https://git.kernel.org/stable/c/2d653bb63d598ae4b096dd678744bdcc34ee89e8","https://git.kernel.org/stable/c/818156caffbf55cb4d368f9c3cac64e458fb49c9"],"weaknesses":["CWE-125"],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/22xxx/CVE-2026-22984.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-22984","state":"PUBLISHED","datePublished":"2026-01-23T15:24:06.245Z","dateUpdated":"2026-10-19T18:25:26.154Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-01-13T15:37:45.936Z"},"containers":{"cna":{"title":"libceph: prevent potential out-of-bounds reads in handle_auth_done()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: prevent potential out-of-bounds reads in handle_auth_done()\n\nPerform an explicit bounds check on payload_len to avoid a possible\nout-of-bounds access in the callout.\n\n[ idryomov: changelog ]"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","status":"affected","lessThan":"194cfe2af4d2a1de599d39dad636b47c2f6c2c96","versionType":"git"},{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","status":"affected","lessThan":"79fe3511db416d2f2edcfd93569807cb02736e5e","versionType":"git"},{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","status":"affected","lessThan":"ef208ea331ef688729f64089b895ed1b49e842e3","versionType":"git"},{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","status":"affected","lessThan":"2802ef3380fa8c4a08cda51ec1f085b1a712e9e2","versionType":"git"},{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","status":"affected","lessThan":"2d653bb63d598ae4b096dd678744bdcc34ee89e8","versionType":"git"},{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","status":"affected","lessThan":"818156caffbf55cb4d368f9c3cac64e458fb49c9","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ceph/messenger_v2.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.11","versionType":"semver"},{"version":"5.15.198","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.161","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.121","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.66","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.6","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ceph/messenger_v2.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/194cfe2af4d2a1de599d39dad636b47c2f6c2c96"},{"url":"https://git.kernel.org/stable/c/79fe3511db416d2f2edcfd93569807cb02736e5e"},{"url":"https://git.kernel.org/stable/c/ef208ea331ef688729f64089b895ed1b49e842e3"},{"url":"https://git.kernel.org/stable/c/2802ef3380fa8c4a08cda51ec1f085b1a712e9e2"},{"url":"https://git.kernel.org/stable/c/2d653bb63d598ae4b096dd678744bdcc34ee89e8"},{"url":"https://git.kernel.org/stable/c/818156caffbf55cb4d368f9c3cac64e458fb49c9"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL"},"scenarios":[{"lang":"en","value":"AV:N - The vulnerable parser processes Ceph messenger v2 AUTH_DONE frames received over TCP from a remote Ceph monitor/OSD/MDS peer. A malicious or compromised network peer can supply the crafted frame during the connection/authentication handshake.\nAC:L - The attacker controls the frame tag, control-segment length, payload_len, and payload contents needed to reach the unchecked callout. No race or hard-to-influence system state is required.\nPR:N - The bug is reached before the peer has been authenticated by the client-side msgr2 handshake. The remote attacker does not need privileges on the victim system.\nUI:N - In a reasonable Ceph deployment, clients connect or reconnect to monitors, OSDs, and MDS daemons automatically as part of mounted filesystem or block-device operation. A malicious reachable peer can trigger the malformed AUTH_DONE response without further victim interaction.\nS:U - The impact is within the kernel/libceph client security authority on the same host. This does not cross a VM, IOMMU, or other separate security scope boundary.\nC:H - The missing bounds check lets a peer-controlled payload_len make auth callbacks treat memory beyond the received control buffer as valid input. This is an unbounded kernel out-of-bounds read, so confidentiality impact is High.\nI:H - Although described as an out-of-bounds read, the auth_x callbacks can decrypt and clear claimed reply data in place based on attacker-controlled lengths. With the required conservative scoring, this can plausibly become kernel memory corruption and is scored as High integrity impact.\nA:H - Reading or cryptographically processing beyond the allocated control buffer can fault, corrupt memory, or otherwise crash the kernel. The malformed handshake frame can be sent repeatedly by the malicious peer."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T12:19:55.781Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15.198"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.1.161"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.6.121"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.12.66"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.18.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.19"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-22984","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-06-16T20:34:59.073775Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","lang":"en","type":"CWE","description":"CWE-125 Out-of-bounds Read"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T18:25:26.154Z"}}]}}}