CVE-2022-3534 - Use After Free

Severity

80%

Complexity

21%

Confidentiality

98%

A vulnerability classified as critical has been found in Linux Kernel. Affected is the function btf_dump_name_dups of the file tools/lib/bpf/btf_dump.c of the component libbpf. The manipulation leads to use after free. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-211032.

CVSS 3.1 Base Score 8. CVSS Attack Vector: adjacent_network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 2 years ago

2022-10-17 09:15:00

Last updated 2 years ago

2022-10-19 04:50:00

Affected Software

Linux Kernel

References

N/A

N/A

N/A

Permissions Required, Third Party Advisory

N/A

Patch, Vendor Advisory

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