Answer in brief
CVE-2025-39880 records a Unknown severity vulnerability in libceph: fix invalid accesses to ceph_connection_v1_info. 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.
A CVSS score is not reported in the current record. 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 | >=cd1a677cad994021b19665ed476aea63f5d54f31 <ea12ab684f8ae8a6da11a22c78d94a79e2163096 || >=cd1a677cad994021b19665ed476aea63f5d54f31 <591ea9c30737663a471b2bb07b27ddde86b020d5 || >=cd1a677cad994021b19665ed476aea63f5d54f31 <23538cfbeed87159a5ac6c61e7a6de3d8d4486a8 || >=cd1a677cad994021b19665ed476aea63f5d54f31 <35dbbc3dbf8bccb2d77c68444f42c1e6d2d27983 || >=cd1a677cad994021b19665ed476aea63f5d54f31 <6bd8b56899be0b514945f639a89ccafb8f8dfaef || >=cd1a677cad994021b19665ed476aea63f5d54f31 <cdbc9836c7afadad68f374791738f118263c5371 | ea12ab684f8ae8a6da11a22c78d94a79e2163096, 591ea9c30737663a471b2bb07b27ddde86b020d5, 23538cfbeed87159a5ac6c61e7a6de3d8d4486a8, 35dbbc3dbf8bccb2d77c68444f42c1e6d2d27983, 6bd8b56899be0b514945f639a89ccafb8f8dfaef, cdbc9836c7afadad68f374791738f118263c5371 |
| Linux/Linuxgeneric | 5.11 | Not reported |
Published upstream
Sep 23, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2025-39880 records a Unknown severity vulnerability in libceph: fix invalid accesses to ceph_connection_v1_info. 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.
A CVSS score is not reported in the current record. 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 | >=cd1a677cad994021b19665ed476aea63f5d54f31 <ea12ab684f8ae8a6da11a22c78d94a79e2163096 || >=cd1a677cad994021b19665ed476aea63f5d54f31 <591ea9c30737663a471b2bb07b27ddde86b020d5 || >=cd1a677cad994021b19665ed476aea63f5d54f31 <23538cfbeed87159a5ac6c61e7a6de3d8d4486a8 || >=cd1a677cad994021b19665ed476aea63f5d54f31 <35dbbc3dbf8bccb2d77c68444f42c1e6d2d27983 || >=cd1a677cad994021b19665ed476aea63f5d54f31 <6bd8b56899be0b514945f639a89ccafb8f8dfaef || >=cd1a677cad994021b19665ed476aea63f5d54f31 <cdbc9836c7afadad68f374791738f118263c5371 | ea12ab684f8ae8a6da11a22c78d94a79e2163096, 591ea9c30737663a471b2bb07b27ddde86b020d5, 23538cfbeed87159a5ac6c61e7a6de3d8d4486a8, 35dbbc3dbf8bccb2d77c68444f42c1e6d2d27983, 6bd8b56899be0b514945f639a89ccafb8f8dfaef, cdbc9836c7afadad68f374791738f118263c5371 |
| Linux/Linuxgeneric | 5.11 | Not reported |
Published upstream
Sep 23, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.