PT-2025-44120 · Linux+3 · Linux Kernel+3
Published
2025-09-25
·
Updated
2026-05-07
·
CVE-2025-40052
CVSS v2.0
4.9
Medium
| Vector | AV:L/AC:L/Au:N/C:N/I:N/A:C |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The Linux kernel contains an issue within the SMB client related to cryptographic buffers in non-linear memory. The crypto API, specifically through the scatterlist API, requires input buffers to be in linear memory. The issue arises when allocating an AEAD request buffer using
kvzalloc(), which can place the buffer in vmalloc space. This can lead to a kernel bug when handling tasks with stacks in vmalloc areas, potentially triggered by numerous parallel read and write operations on an encrypted mount. The root cause is the use of vmalloc'd memory with the scatterlist API, which expects linear memory.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Use After Free
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Related Identifiers
Affected Products
Linuxmint
Linux Kernel
Suse
Ubuntu