libceph: fix invalid accesses to ceph_connection_v1_info

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-39880
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-09-23 06:15:47 UTC
Updated2026-07-30 06:23:53 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem Types: CWE-704

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected cd1a677cad994021b19665ed476aea63f5d54f31 ea12ab684f8ae8a6da11a22c78d94a79e2163096 git Not specified
CNA Linux Linux affected cd1a677cad994021b19665ed476aea63f5d54f31 591ea9c30737663a471b2bb07b27ddde86b020d5 git Not specified
CNA Linux Linux affected cd1a677cad994021b19665ed476aea63f5d54f31 23538cfbeed87159a5ac6c61e7a6de3d8d4486a8 git Not specified
CNA Linux Linux affected cd1a677cad994021b19665ed476aea63f5d54f31 35dbbc3dbf8bccb2d77c68444f42c1e6d2d27983 git Not specified
CNA Linux Linux affected cd1a677cad994021b19665ed476aea63f5d54f31 6bd8b56899be0b514945f639a89ccafb8f8dfaef git Not specified
CNA Linux Linux affected cd1a677cad994021b19665ed476aea63f5d54f31 cdbc9836c7afadad68f374791738f118263c5371 git Not specified
CNA Linux Linux affected 5.11 Not specified
CNA Linux Linux unaffected 5.11 semver Not specified
CNA Linux Linux unaffected 5.15.194 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.153 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.107 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.48 6.12.* semver Not specified
CNA Linux Linux unaffected 6.16.8 6.16.* semver Not specified
CNA Linux Linux unaffected 6.17 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
lists.debian.org/debian-lts-announce/2025/10/msg00008.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
git.kernel.org/stable/c/ea12ab684f8ae8a6da11a22c78d94a79e2163096 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/35dbbc3dbf8bccb2d77c68444f42c1e6d2d27983 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/591ea9c30737663a471b2bb07b27ddde86b020d5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/cdbc9836c7afadad68f374791738f118263c5371 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/6bd8b56899be0b514945f639a89ccafb8f8dfaef 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/23538cfbeed87159a5ac6c61e7a6de3d8d4486a8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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