PT-2019-4662 · Linux+4 · Linux Kernel+4
Tristan Madani
·
Publicado
2019-11-06
·
Atualizado
2023-01-17
·
CVE-2019-19807
CVSS v3.1
7.8
Alta
| Vetor | 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 versions prior to 5.3.11
Description
The issue is related to a use-after-free error in the Linux kernel, specifically in the sound/core/timer.c file. This error is caused by erroneous code refactoring and is associated with the
snd timer open and snd timer close locked functions. The timeri variable was originally intended for a newly created timer instance but was used for a different purpose after refactoring. Exploitation of this issue may allow an attacker to elevate their privileges.Recommendations
For Linux kernel versions prior to 5.3.11, update to version 5.3.11 or later to resolve the issue. As a temporary workaround, consider restricting access to the
snd timer open and snd timer close locked functions until a patch is available.Exploit
Correção
Use After Free
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Enumeração de Fraquezas
Identificadores relacionados
Produtos afetados
Alt Linux
Centos
Linux Kernel
Red Hat
Ubuntu