CVE-2025-39880

HIGH EPSS 4.1%
Published Sep 23, 20259mo ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Sep 23, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago

Description

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.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
4.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-704

Affected Products 11

VendorProductVersionRange
linuxlinux_kernel*≥5.11  –  <5.15.194
linuxlinux_kernel*≥5.16  –  <6.1.153
linuxlinux_kernel*≥6.2  –  <6.6.107
linuxlinux_kernel*≥6.7  –  <6.12.48
linuxlinux_kernel*≥6.13  –  <6.16.8
linuxlinux_kernel6.17any
linuxlinux_kernel6.17any
linuxlinux_kernel6.17any
linuxlinux_kernel6.17any
linuxlinux_kernel6.17any
debiandebian_linux11.0any

References 7

  • git.kernel.org https://git.kernel.org/stable/c/23538cfbeed87159a5ac6c61e7a6de3d8d4486a8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/35dbbc3dbf8bccb2d77c68444f42c1e6d2d27983
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/591ea9c30737663a471b2bb07b27ddde86b020d5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6bd8b56899be0b514945f639a89ccafb8f8dfaef
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cdbc9836c7afadad68f374791738f118263c5371
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ea12ab684f8ae8a6da11a22c78d94a79e2163096
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
    Mailing ListThird Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/23538cfbeed87159a5ac6c61e7a6de3d8d4486a8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/35dbbc3dbf8bccb2d77c68444f42c1e6d2d27983
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/591ea9c30737663a471b2bb07b27ddde86b020d5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6bd8b56899be0b514945f639a89ccafb8f8dfaef
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cdbc9836c7afadad68f374791738f118263c5371
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ea12ab684f8ae8a6da11a22c78d94a79e2163096
    Patch