CVE-2026-89990
- Source
- https://cve.org/CVERecord?id=CVE-2026-89990
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89990.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-89990
- Downstream
- Published
- 2026-09-16T10:33:04Z
- Modified
- 2026-09-18T03:46:16Z
- Severity
-
- 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- ceph: lock mutex in ceph_mds_check_access()
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
ceph: lock mutex in ceph_mds_check_access()
MDS session OPEN handling replaces mdsc->s_cap_auths under mdsc->mutex, freeing the previous array and its strings.
ceph_mds_check_access() traverses this array without holding the mutex. A concurrent session reopen can therefore free the array while it is being inspected, resulting in a use-after-free like this:
Unable to handle kernel paging request at virtual address 003aaad64b2c8bb9 [...] Internal error: Oops: 0000000096000004 [#1] SMP Modules linked in: CPU: 56 UID: 2953037534 PID: 1253231 Comm: php-cgi8.4 Not tainted 6.18.45-i2-ampere #1146 NONE [..] pc : ceph_mds_check_access+0xd4/0x550 lr : ceph_mds_check_access+0xc8/0x550 [...] Call trace: ceph_mds_check_access+0xd4/0x550 (P) ceph_atomic_open+0x138/0xbe8 path_openat+0xa24/0xfa8 do_filp_open+0x94/0x158 do_sys_openat2+0x88/0xf8
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89990.json" }- References
-
- https://git.kernel.org/stable/c/729c1ff670ece6f3d4b1738365a0b2f90d487523
- https://git.kernel.org/stable/c/a61c6ae1dae2611082b831b4aaa780878099c012
- https://git.kernel.org/stable/c/ca5bfea2045ef2eb3305cf2a9d8da549b76c37d3
- https://git.kernel.org/stable/c/df1a97d5313fccadb08390306d49b194fb027392
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89990.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-89990
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / 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
-
Introduced596afb0b8933ba6ed7227adcc538db26feb25c74Fixed729c1ff670ece6f3d4b1738365a0b2f90d487523Fixedca5bfea2045ef2eb3305cf2a9d8da549b76c37d3Fixeddf1a97d5313fccadb08390306d49b194fb027392Fixeda61c6ae1dae2611082b831b4aaa780878099c012