PT-2025-49477 · Linux · Linux Kernel
Published
2025-12-08
·
Updated
2026-02-24
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CVE-2023-53747
None
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Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The Linux kernel contains a use-after-free issue within the vc screen module. Specifically, a struct
vc data pointer in the vcs write() function can be freed by vc port destruct() after a call to console unlock(). Subsequently, accessing this freed memory within the vcs size() function leads to a use-after-free condition. This was reported by Syzkaller, which identified a slab-use-after-free in vcs size(). The issue occurs due to the failure to reload the vc data struct pointer after console lock() within the vcs write() function.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
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Related Identifiers
Affected Products
Linux Kernel