PT-2019-4493 · Linux+2 · Linux Kernel+2
Publicado
2019-04-29
·
Atualizado
2025-09-29
·
CVE-2019-19816
CVSS v2.0
9.3
Alta
| Vetor | AV:N/AC:M/Au:N/C:C/I:C/A:C |
Name of the Vulnerable Software and Affected Versions
Linux kernel version 5.0.21
Description
The issue is related to a buffer overflow in the
btrfs map block function of the Linux kernel, specifically when handling a crafted btrfs filesystem image with a certain configuration. This can lead to a slab-out-of-bounds write access, potentially causing a denial of service. The problem arises when the number of data stripes is set to 1, which is mishandled by the btrfs map block function in fs/btrfs/volumes.c.Recommendations
For Linux kernel version 5.0.21, consider disabling the
btrfs map block function or restricting access to the btrfs filesystem until a patch is available. Avoid mounting crafted btrfs filesystem images to minimize the risk of exploitation.Exploit
Correção
Memory Corruption
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Enumeração de Fraquezas
Identificadores relacionados
Produtos afetados
Alt Linux
Linux Kernel
Ubuntu