{"id":"CVE-2026-52958","summary":"libceph: Fix potential out-of-bounds access in osdmap_decode()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: Fix potential out-of-bounds access in osdmap_decode()\n\nWhen decoding osd_state and osd_weight from an incoming osdmap in\nosdmap_decode(), both are decoded for each osd, i.e., map-\u003emax_osd\ntimes. The ceph_decode_need() check only accounts for\nsizeof(*map-\u003eosd_weight) once. This can potentially result in an\nout-of-bounds memory access if the incoming message is corrupted such\nthat the max_osd value exceeds the actual content of the osdmap message.\n\nThis patch fixes the issue by changing the corresponding part in the\nceph_decode_need() check to account for\nmap-\u003emax_osd*sizeof(*map-\u003eosd_weight).","modified":"2026-07-08T08:09:44.862606348Z","published":"2026-06-24T16:28:39.723Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52958.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0d2dd7e6bb74fd7712aa73457a4a821906c6863a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/35d0ed82d03e5ee77ea4f31f20e29562a7721649"},{"type":"WEB","url":"https://git.kernel.org/stable/c/36a79759a288961b1ff28a68ec2d1f56f6848098"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3f2575bb7f955d42569d96c3e04fa958a0dcf4b4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/48df98d12b15360cd56af5c1f460307b340c1197"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8713bbc4b2b9ad78f803978e54b7e49dd21bd9be"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e7187f33c02488697ec0d01d82bf7a3f8deaba8f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ee933694645dac062d65fc2743f92bc06fa0db6b"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52958.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52958"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"dcbc919a5dc8c2629684a113a90c0b6fe10c3462"},{"fixed":"36a79759a288961b1ff28a68ec2d1f56f6848098"},{"fixed":"3f2575bb7f955d42569d96c3e04fa958a0dcf4b4"},{"fixed":"8713bbc4b2b9ad78f803978e54b7e49dd21bd9be"},{"fixed":"0d2dd7e6bb74fd7712aa73457a4a821906c6863a"},{"fixed":"e7187f33c02488697ec0d01d82bf7a3f8deaba8f"},{"fixed":"48df98d12b15360cd56af5c1f460307b340c1197"},{"fixed":"ee933694645dac062d65fc2743f92bc06fa0db6b"},{"fixed":"35d0ed82d03e5ee77ea4f31f20e29562a7721649"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-52958.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.3.0"},{"fixed":"5.10.258"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.209"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.175"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.141"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.91"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.33"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-52958.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"}]}