CVE-2026-46024
published 2026-05-27CVE-2026-46024: In the Linux kernel, the following vulnerability has been resolved: libceph: Prevent potential null-ptr-deref in ceph_handle_auth_reply() If a message of type…
high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
In the Linux kernel, the following vulnerability has been resolved:
libceph: Prevent potential null-ptr-deref in ceph_handle_auth_reply()
If a message of type CEPH_MSG_AUTH_REPLY contains a zero value for both
protocol and result, this is currently not treated as an error. In case
of ac->negotiating == true and ac->protocol > 0, this leads to setting
ac->protocol = 0 and ac->ops = NULL. Thereafter, the check for
ac->protocol != protocol returns false, and init_protocol() is not
called. Subsequently, ac->ops->handle_reply() is called, which leads to
a null pointer dereference, because ac->ops is still NULL.
This patch changes the check for ac->protocol != protocol to
!ac->protocol, as this also includes the case when the protocol was set
to zero in the message. This causes the message to be treated as
containing a bad auth protocol.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc < 9ded62c302c0342efdb5eda3bf6e75720caad0df | 9ded62c302c0342efdb5eda3bf6e75720caad0df |
| linux | linux | >= 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc < f101271fcf55d7eacfefd610b51ec65f46ba8118 | f101271fcf55d7eacfefd610b51ec65f46ba8118 |
| linux | linux | >= 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc < 4b2738b93edad661178340239de657d876b73d3d | 4b2738b93edad661178340239de657d876b73d3d |
| linux | linux | >= 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc < 927e4bd5692f2a4901808822981fb2c8d4456548 | 927e4bd5692f2a4901808822981fb2c8d4456548 |
| linux | linux | >= 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc < 016bc663657366d386993f63eb31072eb45a2b77 | 016bc663657366d386993f63eb31072eb45a2b77 |
| linux | linux | >= 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc < 8f2be7285941a33a9f72579a23b96392f83c758e | 8f2be7285941a33a9f72579a23b96392f83c758e |
| linux | linux | >= 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc < 5199c125d25aeae8615c4fc31652cc0fe624338e | 5199c125d25aeae8615c4fc31652cc0fe624338e |
| linux | linux_kernel | — | — |