CVE-2023-3317 - Use After Free

Severity

71%

Complexity

18%

Confidentiality

86%

A use-after-free flaw was found in mt7921_check_offload_capability in drivers/net/wireless/mediatek/mt76/mt7921/init.c in wifi mt76/mt7921 sub-component in the Linux Kernel. This flaw could allow an attacker to crash the system after 'features' memory release. This vulnerability could even lead to a kernel information leak problem.

CVSS 3.1 Base Score 7.1. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H).

Demo Examples

Use After Free

CWE-416

The following example demonstrates the weakness.


               
}
free(buf3R2);

Use After Free

CWE-416

The following code illustrates a use after free error:


               
}
free(ptr);
logError("operation aborted before commit", ptr);

When an error occurs, the pointer is immediately freed. However, this pointer is later incorrectly used in the logError function.

Overview

First reported 1 year ago

2023-06-23 18:15:00

Last updated 1 year ago

2023-11-07 04:18:00

Affected Software

Linux Kernel

References

https://patchwork.kernel.org/project/linux-wireless/patch/51fd8f76494348aa9ecbf0abc471ebe47a983dfd.1679502607.git.lorenzo@kernel.org/

https://patchwork.kernel.org/project/linux-wireless/patch/51fd8f76494348aa9ecbf0abc471ebe47a983dfd.1679502607.git.lorenzo@kernel.org/

Vendor Advisory

https://patchwork.kernel.org/project/linux-wireless/patch/51fd8f76494348aa9ecbf0abc471ebe47a983dfd.1679502607.git.lorenzo%40kernel.org/

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