PT-2023-9775 · Linux+3 · Linux Kernel+3
Beau Belgrave
·
Publicado
2023-11-01
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Atualizado
2026-05-26
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CVE-2023-52879
CVSS v3.1
5.5
Média
| Vetor | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The vulnerability is related to a use-after-free bug in the Linux kernel's tracing component. It occurs when a kprobe event is deleted while its associated file is still open, causing a reference to the already freed event file descriptor. This can lead to a kernel crash. The issue can be exploited by creating a kprobe event, opening its enable file, deleting the event, and then closing the file descriptor. To solve this, a reference count and a new flag called "FREED" are added to the event file descriptor to prevent it from being freed while still in use.
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
DoS
NULL Pointer Dereference
Use After Free
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Identificadores relacionados
Produtos afetados
Astra Linux
Linux Kernel
Red Os
Suse