CVE-2025-39880 (GCVE-0-2025-39880)

Vulnerability from cvelistv5 – Published: 2025-09-23 06:00 – Updated: 2026-05-11 21:38
VLAI
Title
libceph: fix invalid accesses to ceph_connection_v1_info
Summary
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: cd1a677cad994021b19665ed476aea63f5d54f31 , < ea12ab684f8ae8a6da11a22c78d94a79e2163096 (git)
Affected: cd1a677cad994021b19665ed476aea63f5d54f31 , < 591ea9c30737663a471b2bb07b27ddde86b020d5 (git)
Affected: cd1a677cad994021b19665ed476aea63f5d54f31 , < 23538cfbeed87159a5ac6c61e7a6de3d8d4486a8 (git)
Affected: cd1a677cad994021b19665ed476aea63f5d54f31 , < 35dbbc3dbf8bccb2d77c68444f42c1e6d2d27983 (git)
Affected: cd1a677cad994021b19665ed476aea63f5d54f31 , < 6bd8b56899be0b514945f639a89ccafb8f8dfaef (git)
Affected: cd1a677cad994021b19665ed476aea63f5d54f31 , < cdbc9836c7afadad68f374791738f118263c5371 (git)
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Linux Linux Affected: 5.11
Unaffected: 0 , < 5.11 (semver)
Unaffected: 5.15.194 , ≤ 5.15.* (semver)
Unaffected: 6.1.153 , ≤ 6.1.* (semver)
Unaffected: 6.6.107 , ≤ 6.6.* (semver)
Unaffected: 6.12.48 , ≤ 6.12.* (semver)
Unaffected: 6.16.8 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
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Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.