CVE-2024-40909

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix a potential use-after-free in bpf_link_free() After commit 1a80dbcb2dba, bpf_link can be freed by link->ops->dealloc_deferred, but the code still tests and uses link->ops->dealloc afterward, which leads to a use-after-free as reported by syzbot. Actually, one of them should be sufficient, so just call one of them instead of both. Also add a WARN_ON() in case of any problematic implementation.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/2884dc7d08d98a89d8d65121524bb7533183a63a	Patch
https://git.kernel.org/stable/c/91cff53136daeff50816b0baeafd38a6976f6209	Patch
https://git.kernel.org/stable/c/fa97b8fed9896f1e89cb657513e483a152d4c382	Patch
https://git.kernel.org/stable/c/2884dc7d08d98a89d8d65121524bb7533183a63a	Patch
https://git.kernel.org/stable/c/91cff53136daeff50816b0baeafd38a6976f6209	Patch
https://git.kernel.org/stable/c/fa97b8fed9896f1e89cb657513e483a152d4c382	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:6.10:rc1::::::
	cpe:2.3:o:linux:linux_kernel:6.10:rc2::::::

History

No history.

Information

Published : 2024-07-12 13:15

Updated : 2024-11-21 09:31

NVD link : CVE-2024-40909

Mitre link : CVE-2024-40909

CVE.ORG link : CVE-2024-40909

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-416

Use After Free

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