PT-2023-8768 · Linux+6 · Linux Kernel+6
Hao Sun
·
Published
2023-12-08
·
Updated
2026-05-26
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CVE-2023-52452
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The issue is related to the Linux kernel's handling of uninitialized stack memory. Privileged programs are supposed to be able to read this memory, but before the patch, these accesses were permitted inconsistently. The patch fixes this by allowing these accesses and also fixes the tracking of the stack size for variable-offset reads. This could have led to a program verifying but then attempting to read out-of-bounds data at runtime because a too small stack had been allocated for it. The
check stack slot within bounds() and check stack range initialized() functions were affected. The patch centralizes the tracking of stack size in grow stack state() and lifts the calls to grow stack state() to check stack access within bounds().Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Improper Initialization
Out of bounds Read
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Related Identifiers
Affected Products
Alt Linux
Astra Linux
Debian
Linuxmint
Linux Kernel
Suse
Ubuntu