CVE-2022-49561

MEDIUM EPSS 18.5%
Published Feb 26, 20251y ago · Modified Jun 17, 20261w ago
5.5 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: netfilter: conntrack: re-fetch conntrack after insertion In case the conntrack is clashing, insertion can free skb->_nfct and set skb->_nfct to the already-confirmed entry. This wasn't found before because the conntrack entry and the extension space used to free'd after an rcu grace period, plus the race needs events enabled to trigger.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
18.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 7

VendorProductVersionRange
linuxlinux_kernel*≥4.7  –  <4.14.282
linuxlinux_kernel*≥4.15  –  <4.19.246
linuxlinux_kernel*≥4.20  –  <5.4.197
linuxlinux_kernel*≥5.5  –  <5.10.120
linuxlinux_kernel*≥5.11  –  <5.15.45
linuxlinux_kernel*≥5.16  –  <5.17.13
linuxlinux_kernel*≥5.18  –  <5.18.2

References 8

  • git.kernel.org https://git.kernel.org/stable/c/01989d7eebb61c99bd4b88ebc8e261bd2f02caed
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/04e4a11dc723c52db7a36dc58f0d69ce6426f8f0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/04f9e9104c969d8ce10a4a43634f641ed082092d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/56b14ecec97f39118bf85c9ac2438c5a949509ed
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/91a36ec160ec1a0c8f5352b772dffcbb0b6023e3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/92a999d1963eed0df666284e20055136ceabd12f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b16bb373988da3ceb0308381634117e18b6ec60d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e97222b785e70e8973281666d709baad6523d8af
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/01989d7eebb61c99bd4b88ebc8e261bd2f02caed
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/04e4a11dc723c52db7a36dc58f0d69ce6426f8f0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/04f9e9104c969d8ce10a4a43634f641ed082092d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/56b14ecec97f39118bf85c9ac2438c5a949509ed
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/91a36ec160ec1a0c8f5352b772dffcbb0b6023e3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/92a999d1963eed0df666284e20055136ceabd12f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b16bb373988da3ceb0308381634117e18b6ec60d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e97222b785e70e8973281666d709baad6523d8af
    Patch