PT-2023-9481 · Linux+6 · Linux Kernel+6
Fei Yang
·
Publicado
2023-10-12
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Atualizado
2025-09-29
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CVE-2023-52504
CVSS v3.1
7.1
Alta
| Vetor | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The issue is related to the x86/alternatives component of the Linux kernel, where KASAN (Kernel Address Sanitizer) triggers during apply alternatives() on a 5-level paging machine, causing an out-of-bounds read in rcu is watching(). This occurs because KASAN gets confused when apply alternatives() patches the KASAN SHADOW START users. A test patch that makes KASAN SHADOW START static works around the issue. The problem is fixed by disabling KASAN while the kernel is patching alternatives.
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Out of bounds Read
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Enumeração de Fraquezas
Identificadores relacionados
Produtos afetados
Alt Linux
Astra Linux
Linuxmint
Linux Kernel
Red Os
Suse
Ubuntu