CVE-2022-49561

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2022-49561
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.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

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

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

24 Oct 2025, 15:50

Type Values Removed Values Added
CWE NVD-CWE-noinfo
First Time Linux
Linux linux Kernel
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: conntrack: volver a obtener conntrack después de la inserción En caso de que conntrack esté en conflicto, la inserción puede liberar skb->_nfct y establecer skb->_nfct en la entrada ya confirmada. Esto no se encontró antes porque la entrada conntrack y el espacio de extensión solían liberarse después de un período de gracia de rcu, además de que la ejecución necesita eventos habilitados para activarse.
References () https://git.kernel.org/stable/c/01989d7eebb61c99bd4b88ebc8e261bd2f02caed - () https://git.kernel.org/stable/c/01989d7eebb61c99bd4b88ebc8e261bd2f02caed - Patch
References () https://git.kernel.org/stable/c/04e4a11dc723c52db7a36dc58f0d69ce6426f8f0 - () https://git.kernel.org/stable/c/04e4a11dc723c52db7a36dc58f0d69ce6426f8f0 - Patch
References () https://git.kernel.org/stable/c/04f9e9104c969d8ce10a4a43634f641ed082092d - () https://git.kernel.org/stable/c/04f9e9104c969d8ce10a4a43634f641ed082092d - Patch
References () https://git.kernel.org/stable/c/56b14ecec97f39118bf85c9ac2438c5a949509ed - () https://git.kernel.org/stable/c/56b14ecec97f39118bf85c9ac2438c5a949509ed - Patch
References () https://git.kernel.org/stable/c/91a36ec160ec1a0c8f5352b772dffcbb0b6023e3 - () https://git.kernel.org/stable/c/91a36ec160ec1a0c8f5352b772dffcbb0b6023e3 - Patch
References () https://git.kernel.org/stable/c/92a999d1963eed0df666284e20055136ceabd12f - () https://git.kernel.org/stable/c/92a999d1963eed0df666284e20055136ceabd12f - Patch
References () https://git.kernel.org/stable/c/b16bb373988da3ceb0308381634117e18b6ec60d - () https://git.kernel.org/stable/c/b16bb373988da3ceb0308381634117e18b6ec60d - Patch
References () https://git.kernel.org/stable/c/e97222b785e70e8973281666d709baad6523d8af - () https://git.kernel.org/stable/c/e97222b785e70e8973281666d709baad6523d8af - Patch
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5

26 Feb 2025, 07:01

Type Values Removed Values Added
New CVE
Information

Published : 2025-02-26 07:01

Updated : 2025-10-24 15:50

NVD link : CVE-2022-49561

Mitre link : CVE-2022-49561

CVE.ORG link : CVE-2022-49561

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo