CVE-2022-49149

MEDIUM EPSS 5.6%
Published Feb 26, 20251y ago · Modified Jun 17, 20261w ago
4.7 CVSS 3.1
Medium
Find Similar
Published Feb 26, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix call timer start racing with call destruction The rxrpc_call struct has a timer used to handle various timed events relating to a call. This timer can get started from the packet input routines that are run in softirq mode with just the RCU read lock held. Unfortunately, because only the RCU read lock is held - and neither ref or other lock is taken - the call can start getting destroyed at the same time a packet comes in addressed to that call. This causes the timer - which was already stopped - to get restarted. Later, the timer dispatch code may then oops if the timer got deallocated first. Fix this by trying to take a ref on the rxrpc_call struct and, if successful, passing that ref along to the timer. If the timer was already running, the ref is discarded. The timer completion routine can then pass the ref along to the call's work item when it queues it. If the timer or work item where already queued/running, the extra ref is discarded.

CVSS Details

Base Score
4.7
Exploitability
1.0
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
5.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-362

Affected Products 13

VendorProductVersionRange
linuxlinux_kernel*≥4.15.1  –  <5.10.110
linuxlinux_kernel*≥5.11  –  <5.15.33
linuxlinux_kernel*≥5.16  –  <5.16.19
linuxlinux_kernel*≥5.17  –  <5.17.2
linuxlinux_kernel4.15any
linuxlinux_kernel4.15any
linuxlinux_kernel4.15any
linuxlinux_kernel4.15any
linuxlinux_kernel4.15any
linuxlinux_kernel4.15any
linuxlinux_kernel4.15any
linuxlinux_kernel4.15any
linuxlinux_kernel4.15any

References 5

  • git.kernel.org https://git.kernel.org/stable/c/051360e51341cd17738d82c15a8226010c7cb7f6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4a7f62f91933c8ae5308f9127fd8ea48188b6bc3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/54df5a37f1d951ed27fd47bf9b15a42279582110
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5e3c11144e557a9dbf9a2f6abe444689ef9d8aae
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8cbf4ae7a2833767d63114573e5f9a45740cc975
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/051360e51341cd17738d82c15a8226010c7cb7f6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4a7f62f91933c8ae5308f9127fd8ea48188b6bc3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/54df5a37f1d951ed27fd47bf9b15a42279582110
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5e3c11144e557a9dbf9a2f6abe444689ef9d8aae
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8cbf4ae7a2833767d63114573e5f9a45740cc975
    Patch