CVE-2026-68155
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
libceph: Reject monmaps advertising zero monitors
In the Linux kernel, the following vulnerability has been resolved: libceph: Reject monmaps advertising zero monitors A message of type CEPH_MSG_MON_MAP contains a monmap that is sent from a monitor to the client. This monmap contains information about the existing monitors in the cluster. Currently, a monmap indicating that there are zero monitors in the cluster is treated as valid. However, it is impossible to have zero monitors in the cluster and still receive a valid monmap from a monitor. Therefore, such a monmap must be corrupted and should be treated as invalid. Furthermore, a monmap with a monitor count of zero can subsequently crash the client when attempting to open a session with a monitor in __open_session(). This happens because the "BUG_ON(monc->monmap->num_mon < 1)" assertion in pick_new_mon() is triggered. This patch extends a check in ceph_monmap_decode() to also reject arriving mon_maps with num_mon == 0 rather than only with num_mon > CEPH_MAX_MON. [ idryomov: drop "log output for unusual values of num_mon" part ]
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| ba75bb98cfb93b62c54af25bf67ff90857264bbe | affected | git | ba5f0015bfd376d764163045a61c17be75f44dae | Unavailable | None listed |
| ba75bb98cfb93b62c54af25bf67ff90857264bbe | affected | git | caf082ef8609a6ac26159ce115f55ab7d00231a3 | Unavailable | None listed |
| ba75bb98cfb93b62c54af25bf67ff90857264bbe | affected | git | e3ccd4ecab09b22f507f49cb7ed9990c7158ceab | Unavailable | None listed |
| ba75bb98cfb93b62c54af25bf67ff90857264bbe | affected | git | 0591a15815b498be628a937146e44487d599ba33 | Unavailable | None listed |
| ba75bb98cfb93b62c54af25bf67ff90857264bbe | affected | git | cd0d41bc569632eaaeccde9d2a6bc919ec00c407 | Unavailable | None listed |
| ba75bb98cfb93b62c54af25bf67ff90857264bbe | affected | git | e67e8b694872c9bc66996040f9de9242f6236ed9 | Unavailable | None listed |
| ba75bb98cfb93b62c54af25bf67ff90857264bbe | affected | git | 3b249546f59c3d6d3592c10657f82bc3f1faa07c | Unavailable | None listed |
| ba75bb98cfb93b62c54af25bf67ff90857264bbe | affected | git | 40480eee361ed9676b3f844d532ac28b47251634 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 2.6.34 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 2.6.34 | Unavailable | None listed |
| 5.10.271 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.216 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.183 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.148 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.101 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.42 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.1.6 | unaffected | semver | Unavailable | 7.1.* | None listed |
| 7.2 | unaffected | original_commit_for_fix | Unavailable | * | None listed |