Access of Resource Using Incompatible Type ('Type Confusion') Affecting kernel-64k-modules-extra package, versions *


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

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  • Snyk IDSNYK-RHEL9-KERNEL64KMODULESEXTRA-13032505
  • published24 Sept 2025
  • disclosed23 Sept 2025

Introduced: 23 Sep 2025

NewCVE-2025-39880  (opens in a new tab)
CWE-843  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:9 kernel-64k-modules-extra.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-64k-modules-extra package and not the kernel-64k-modules-extra package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

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 Base Scores

version 3.1