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CVE-2023-52679

Disclosure Date: May 17, 2024 •
CVE-2023-52679
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Description

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.

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CVSS V3 Severity and Metrics
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Impact Score:
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Attack Vector (AV):
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Availability (A):
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General Information

Offensive Application
Unknown
Utility Class
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Ports
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OS
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Vulnerable Versions
Linux 26b4d702c44f
Linux not down converted
Prerequisites
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Discovered By
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PoC Author
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Metasploit Module
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Reporter
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Vendors

  • Linux

Products

  • Linux
Technical Analysis