Description
In the Linux kernel, the following vulnerability has been resolved: libceph: fix invalid accesses to ceph_connection_v1_info There is a place where generic code in messenger.c is reading and another place where it is writing to con->v1 union member without checking that the union member is active (i.e. msgr1 is in use). On 64-bit systems, con->v1.auth_retry overlaps with con->v2.out_iter, so such a read is almost guaranteed to return a bogus value instead of 0 when msgr2 is in use. This ends up being fairly benign because the side effect is just the invalidation of the authorizer and successive fetching of new tickets. con->v1.connect_seq overlaps with con->v2.conn_bufs and the fact that it's being written to can cause more serious consequences, but luckily it's not something that happens often.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
cd1a677cad994021b19665ed476aea63f5d54f31 to < ea12ab684f8ae8a6da11a22c78d94a79e2163096affectedcd1a677cad994021b19665ed476aea63f5d54f31 to < 591ea9c30737663a471b2bb07b27ddde86b020d5affectedcd1a677cad994021b19665ed476aea63f5d54f31 to < 23538cfbeed87159a5ac6c61e7a6de3d8d4486a8affectedcd1a677cad994021b19665ed476aea63f5d54f31 to < 35dbbc3dbf8bccb2d77c68444f42c1e6d2d27983affectedcd1a677cad994021b19665ed476aea63f5d54f31 to < 6bd8b56899be0b514945f639a89ccafb8f8dfaefaffectedcd1a677cad994021b19665ed476aea63f5d54f31 to < cdbc9836c7afadad68f374791738f118263c5371affected
Linux Linux
Default version status: affected
5.11affected0 to < 5.11unaffected5.15.194 to ≤ 5.15.*unaffected6.1.153 to ≤ 6.1.*unaffected6.6.107 to ≤ 6.6.*unaffected6.12.48 to ≤ 6.12.*unaffected6.16.8 to ≤ 6.16.*unaffected6.17 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/ea12ab684f8ae8a6da11a22c78d94a79e2163096 ↗
- https://git.kernel.org/stable/c/591ea9c30737663a471b2bb07b27ddde86b020d5 ↗
- https://git.kernel.org/stable/c/23538cfbeed87159a5ac6c61e7a6de3d8d4486a8 ↗
- https://git.kernel.org/stable/c/35dbbc3dbf8bccb2d77c68444f42c1e6d2d27983 ↗
- https://git.kernel.org/stable/c/6bd8b56899be0b514945f639a89ccafb8f8dfaef ↗
- https://git.kernel.org/stable/c/cdbc9836c7afadad68f374791738f118263c5371 ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html ↗