Answer in brief
CVE-2026-80558 records a Critical severity (CVSS 9.8) vulnerability in libceph: Avoid using invalid osd indices from primary_temp. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=5e8d4d36bf23bb7baf027c479d54395840219928 <505fc50b8ff8e687b7e3ef6866269dea27366224 || >=5e8d4d36bf23bb7baf027c479d54395840219928 <1c705fe8e59c6b16f48964973fb23c8ec4735b73 || >=5e8d4d36bf23bb7baf027c479d54395840219928 <dfe1877d351b99eb1b1a62a3fc2d174220e88e20 || >=5e8d4d36bf23bb7baf027c479d54395840219928 <e2ffeec85201b2bb748e99e12539ee1b92f62796 || >=5e8d4d36bf23bb7baf027c479d54395840219928 <6799d4a916ffcb3d450d8440f9fe0f0862f768d6 || >=5e8d4d36bf23bb7baf027c479d54395840219928 <4f392fec075562dc93bb0c69f37423ca2af9b48f || >=5e8d4d36bf23bb7baf027c479d54395840219928 <e009c5f0ad634c62f5c48a41f1f3c019ecf52555 || >=5e8d4d36bf23bb7baf027c479d54395840219928 <3660b98d1204b419f6a77e9a295f148dcf38d042 | 505fc50b8ff8e687b7e3ef6866269dea27366224, 1c705fe8e59c6b16f48964973fb23c8ec4735b73, dfe1877d351b99eb1b1a62a3fc2d174220e88e20, e2ffeec85201b2bb748e99e12539ee1b92f62796, 6799d4a916ffcb3d450d8440f9fe0f0862f768d6, 4f392fec075562dc93bb0c69f37423ca2af9b48f, e009c5f0ad634c62f5c48a41f1f3c019ecf52555, 3660b98d1204b419f6a77e9a295f148dcf38d042 |
| Linux/Linuxgeneric | 3.15 | Not reported |
Published upstream
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 26, 2026
In the Linux kernel, the following vulnerability has been resolved: libceph: Avoid using invalid osd indices from primary_temp A corrupted osdmap received from a Ceph monitor or OSD may contain osd indices in its pg_temp, primary_temp, pg_upmap, and pg_upmap_items parts that don't exist, i.e., that are greater than max_osd or smaller than CEPH_HOMELESS_OSD (-1). These indices are used to create the up and acting set in ceph_pg_to_up_acting_osds(), called from calc_target(). While most of these osd indices are checked, the one from primary_temp is not. Subsequently, this may lead to calc_target() returning this (potentially invalid) index as target osd for a (linger) request. Because the osd_state, osd_weight, and osd_addr arrays only contain max_osd entries (with indices 0 to max_osd -1), this leads to out-of-bounds accesses when trying to read values from these arrays. This patch fixes the issue by adding a check to get_temp_osds(), so that only valid osd indices from primary_temp are used, and it falls back to using the primary from pg_temp or the up set if it is invalid. [ idryomov: changelog ]
Quoted source text, attributed separately from HOL analysis.