CVE-2025-21964

MEDIUM5.5

cifs: Fix integer overflow while processing acregmax mount option

Published Apr 1, 2025

Modified 2 months ago

Details

In the Linux kernel, the following vulnerability has been resolved:

cifs: Fix integer overflow while processing acregmax mount option

User-provided mount parameter acregmax of type u32 is intended to have an upper limit, but before it is validated, the value is converted from seconds to jiffies which can lead to an integer overflow.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

References

WEBhttps://git.kernel.org/stable/c/0252c33cc943e9e48ddfafaa6b1eb72adb68a099 WEBhttps://git.kernel.org/stable/c/5f500874ab9b3cc8c169c2ab49f00b838520b9c5 WEBhttps://git.kernel.org/stable/c/7489161b1852390b4413d57f2457cd40b34da6cc WEBhttps://git.kernel.org/stable/c/833f2903eb8b70faca7967319e580e9ce69729fc WEBhttps://git.kernel.org/stable/c/a13351624a6af8d91398860b8c9d4cf6c8e63de5 WEBhttps://git.kernel.org/stable/c/dd190168e60ac15408f074a1fe0ce36aff34027b WEBhttps://lists.debian.org/debian-lts-announce/2025/05/msg00045.html ADVISORYhttps://www.cve.org/CVERecord?id=CVE-2025-21964

CVSS Analysis

CVSS v3.1

5.5

Exploitability

Attack Vector

LocalAV:L

Attack Complexity

LowAC:L

Privileges Required

LowPR:L

User Interaction

NoneUI:N

Scope

UnchangedS:U

Impact

Confidentiality

NoneC:N

Integrity

NoneI:N

Availability

HighA:H

5.5/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Ecosystems

Timeline

PublishedApr 1, 2025

ModifiedNov 3, 2025