CVE-2022-50043

In the Linux kernel, the following vulnerability has been resolved: net: fix potential refcount leak in ndisc_router_discovery() The issue happens on specific paths in the function. After both the object `rt` and `neigh` are grabbed successfully, when `lifetime` is nonzero but the metric needs change, the function just deletes the route and set `rt` to NULL. Then, it may try grabbing `rt` and `neigh` again if above conditions hold. The function simply overwrite `neigh` if succeeds or returns if fails, without decreasing the reference count of previous `neigh`. This may result in memory leaks. Fix it by decrementing the reference count of `neigh` in place.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

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/7396ba87f1edf549284869451665c7c4e74ecd4f	Patch
https://git.kernel.org/stable/c/7998043d31d000c3a93f46182e6569dd0eecda34	Patch
https://git.kernel.org/stable/c/ffb15594433391fd7885eb88ce5a7f7bdeefbb15	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:6.0:rc1::::::

History

No history.

Information

Published : 2025-06-18 11:15

Updated : 2025-11-13 18:32

NVD link : CVE-2022-50043

Mitre link : CVE-2022-50043

CVE.ORG link : CVE-2022-50043

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-Other

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