Medium severity · published Nov 28, 2022
CVE-2022-4129
A flaw was found in the Linux kernel's Layer 2 Tunneling Protocol (L2TP)
5.5
CVSS
0.2%
EPSS
No
On KEV
Description
A flaw was found in the Linux kernel's Layer 2 Tunneling Protocol (L2TP). A missing lock when clearing sk_user_data can lead to a race condition and NULL pointer dereference. A local user could use this flaw to potentially crash the system causing a denial of service.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 7% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LK
Linux kernel (l2tp) ·
up to v6.0 · source: vendor
FE
Fedora · Fedoraproject
35; 36; 37 · source: NVD
L2
Layer 2 Tunneling Protocol · Linux
before 6.0 · source: NVD
SS
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem · Siemens
before V1.1 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-4129
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-4129
lists.debian.org
https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7X5SPXMXXFANDASPCKER2JIQO2F3UHCP/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AM5KFIE6JNZXHBA5A2KYDZAT3MEX2B67/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JOKXNIM2R4FQCDRQV67UMAY6EBC72QFG/
lore.kernel.org
https://lore.kernel.org/all/20221114191619.124659-1-jakub%40cloudflare.com/t
lore.kernel.org
https://lore.kernel.org/netdev/20221121085426.21315-1-jakub%40cloudflare.com/t