Vulnerability Details : CVE-2022-4129
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.
Vulnerability category: Memory CorruptionDenial of service
Products affected by CVE-2022-4129
- cpe:2.3:a:linux:layer_2_tunneling_protocol:*:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2022-4129
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2022-4129
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2022-4129
-
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.Assigned by: secalert@redhat.com (Secondary)
-
The product dereferences a pointer that it expects to be valid but is NULL.Assigned by: secalert@redhat.com (Secondary)
-
The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.Assigned by:
- nvd@nist.gov (Primary)
- secalert@redhat.com (Secondary)
References for CVE-2022-4129
-
https://lore.kernel.org/netdev/20221121085426.21315-1-jakub%40cloudflare.com/t
[PATCH net v2] l2tp: Don't sleep and disable BH under writer-side sk_callback_lock
-
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JOKXNIM2R4FQCDRQV67UMAY6EBC72QFG/
[SECURITY] Fedora 36 Update: kernel-6.0.11-200.fc36 - package-announce - Fedora Mailing-Lists
-
https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html
[SECURITY] [DLA 3404-1] linux-5.10 security update
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https://lore.kernel.org/all/20221114191619.124659-1-jakub%40cloudflare.com/t
[PATCH net v4] l2tp: Serialize access to sk_user_data with sk_callback_lock
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7X5SPXMXXFANDASPCKER2JIQO2F3UHCP/
[SECURITY] Fedora 35 Update: kernel-6.0.11-100.fc35 - package-announce - Fedora Mailing-Lists
-
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AM5KFIE6JNZXHBA5A2KYDZAT3MEX2B67/
[SECURITY] Fedora 37 Update: kernel-6.0.11-300.fc37 - package-announce - Fedora Mailing-Lists
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