{"id":"CVE-2026-68131","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-68131","summary":"rbd: Reset positive result codes to zero in object map update path","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nrbd: Reset positive result codes to zero in object map update path\n\nIn a reply message to an RBD request, a positive result code indicates\na data payload, which is not allowed for writes. While\nrbd_osd_req_callback() already resets a positive result code for writes\nto zero, rbd_object_map_callback() does not. This allows a corrupted\nreply to an object map update to trigger the rbd_assert(*result < 0) in\n__rbd_obj_handle_request(). This happens, because\nrbd_object_map_callback() calls rbd_obj_handle_request() ->\n__rbd_obj_handle_request() and passes this positive result code. From\n__rbd_obj_handle_request(), rbd_obj_advance_write() is called, which\nleaves the positive result code unchanged and returns true. Therefore,\nthe if(done && *result) branch is executed in __rbd_obj_handle_request()\nand the assertion triggers.\n\nThis patch fixes the issue by adjusting the logic in the\nrbd_object_map_callback() path. A positive result code for an object map\nupdate is now reset to zero (similar to rbd_osd_req_callback()), and the\nmessage is subsequently handled the same way as if the result code was\nzero from the beginning. Additionally, a WARN_ON_ONCE() is added for\nthis case.","published":"2026-08-10T11:58:54.155Z","modified":"2026-08-14T04:04:00.425913603Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.6.148"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/14995c4250f04b58bf6fc00e0e973a2e1b3cfb9b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2419aa74081007dc4d14ff5640659052dfdfd69a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/34f2a2f32af570dfcc532ad70c080629ee1c32b0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a6c4250b81bd30beae94e1b7a4b26fa1193ad2e4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b1a61366933224b3ad80975c4d01ac2cc6931ecf"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68131.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68131"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-14T04:04:00.425913603Z"}}