CVE-2023-26545 - Double Free

Severity

78%

Complexity

18%

Confidentiality

98%

In the Linux kernel before 6.1.13, there is a double free in net/mpls/af_mpls.c upon an allocation failure (for registering the sysctl table under a new location) during the renaming of a device.

CVSS 3.1 Base Score 7.8. 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:H/A:H).

CVSS 3.1 Base Score 4.7. CVSS Attack Vector: local. CVSS Attack Complexity: high. CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H).

Demo Examples

Double Free

CWE-415

Double Free

CWE-415

While contrived, this code should be exploitable on Linux distributions which do not ship with heap-chunk check summing turned on.


               
}
free(buf1R2);

Overview

First reported 1 year ago

2023-02-25 04:15:00

Last updated 1 year ago

2023-05-03 14:15:00

Affected Software

Linux Kernel

References

https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.13

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=fda6c89fe3d9aca073495a664e1d5aea28cd4377

https://github.com/torvalds/linux/commit/fda6c89fe3d9aca073495a664e1d5aea28cd4377

https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.13

Release Notes

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=fda6c89fe3d9aca073495a664e1d5aea28cd4377

Issue Tracking, Mailing List

https://github.com/torvalds/linux/commit/fda6c89fe3d9aca073495a664e1d5aea28cd4377

Patch

https://security.netapp.com/advisory/ntap-20230316-0009/

https://security.netapp.com/advisory/ntap-20230316-0009/

Third Party Advisory

[debian-lts-announce] 20230502 [SECURITY] [DLA 3404-1] linux-5.10 security update

[debian-lts-announce] 20230503 [SECURITY] [DLA 3403-1] linux security update

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