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🛡️ CVE-2023-52679 — debian-linux

🟠 CVSS 7.8 — High ✅ No Known Exploit CWE-415 NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

of: Fix double free in of_parse_phandle_with_args_map

In the Linux kernel, the following vulnerability has been resolved:

of: Fix double free in of_parse_phandle_with_args_map

In of_parse_phandle_with_args_map() the inner loop that

iterates through the map entries calls of_node_put(new)

to free the reference acquired by the previous iteration

of the inner loop. This assumes that the value of "new" is

NULL on the first iteration of the inner loop.

Make sure that this is true in all iterations of the outer

loop by setting "new" to NULL after its value is assigned to "cur".

Extend the unittest to detect the double free and add an additional

test case that actually triggers this path.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: High — total loss, or loss the attacker controls.
  • Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2023-52679 is classified as CWE-415: Double Free. The same allocation is released twice, corrupting allocator bookkeeping.

Affected software

CVE-2023-52679 is recorded against 3 packages.

  • debian-linux
  • kernel (from 6.7.0 up to 6.7.2)
  • linux-kernel (from 6.7 up to 6.7.2)

Timeline and source

Published on 17 May 2024 and last revised on 4 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
lists.debian.org
lists.debian.org

Other advisories for this package

debian-linux has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-415: Double Free) in other software:

CVE-2023-52679 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity HIGH
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE CWE-415
Public Exploit ✅ No
Source NVD
Published 2024-05-17
Updated 2026-08-20
Modified 2026-08-04

Affected Packages

Software From version Fixed in
debian-linux — —
kernel 6.7.0 6.7.2
linux-kernel 6.7 6.7.2

References

Similar Threats

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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