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CVE

DEBIAN-CVE-2026-89990

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 pr...
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CVE

DEBIAN-CVE-2026-89990

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 pr...

In the Linux kernel, the following vulnerability has been resolved:  ceph: lock mutex in cephmdscheckaccess()  MDS session OPEN handling replaces mdsc->scapauths under mdsc->mutex, freeing the previous array and its strings.  cephmdscheckaccess() 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 : cephmdscheckaccess+0xd4/0x550   lr : cephmdscheckaccess+0xc8/0x550   [...]   Call trace:    cephmdscheckaccess+0xd4/0x550 (P)    cephatomicopen+0x138/0xbe8    pathopenat+0xa24/0xfa8    dofilpopen+0x94/0x158    dosysopenat2+0x88/0xf8

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
-
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://security-tracker.debian.org/tracker/CVE-2026-89990

Severity

9.8

CVSS Score
0
10

Basic Information

Base CVSS
9.8
EPSS Probability
0%
EPSS Percentile
0%
Introduced Version
0
Fix Available
6.12.111-1,7.2.6-1,6.12.111-1~deb12u1

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