CVE-2025-21963: cifs: Fix integer overflow while processing acdirmax mount option
Published Apr 1, 2025
·Updated
cifs: Fix integer overflow while processing acdirmax mount option
Affected Software
17 affected componentsFixes available
Linux Kernel
Linux Linux kernel>=5.12<5.15.180
Linux Linux kernel>=5.16<6.1.132
Linux Linux kernel>=6.2<6.6.84
Linux Linux kernel>=6.7<6.12.20
Linux Linux kernel>=6.13<6.13.8
Linux Linux kernel=6.14-rc1
Linux Linux kernel=6.14-rc2
Linux Linux kernel=6.14-rc3
Linux Linux kernel=6.14-rc4
Linux Linux kernel=6.14-rc5
Linux Linux kernel=6.14-rc6
Microsoft cbl2 kernel 5.15.176.3-3
Microsoft cbl2 kernel 5.15.176.3-3
Microsoft azl3 kernel 6.6.85.1-2
Microsoft azl3 kernel 6.6.82.1-1
Microsoft cbl2 kernel 5.15.180.1-1
Event History
Apr 1, 2025
CVE Published
via MITRE·03:46 PM
Data Sourced
via MITRE·03:46 PM
Description
Data Sourced
via Red Hat·04:04 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·04:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
May 5, 2025
Data Sourced
via Microsoft·07:00 AM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·07:00 AM
Affected Software
Updated
via Microsoft·07:00 AM
Description
Updated
via Microsoft·07:00 AM
DescriptionSeverity
Frequently Asked Questions
1
What is the severity of CVE-2025-21963?
CVE-2025-21963 has been assigned a high severity due to its potential for exploitation in the Linux kernel.
2
How do I fix CVE-2025-21963?
To fix CVE-2025-21963, ensure you update your Linux kernel to the latest patched version that addresses this vulnerability.
3
What versions of the Linux kernel are affected by CVE-2025-21963?
CVE-2025-21963 affects multiple versions of the Linux kernel which process the acdirmax mount option without proper validation.
4
What is the impact of exploiting CVE-2025-21963?
Exploitation of CVE-2025-21963 could lead to unintended behaviors or crashes due to the integer overflow in the acdirmax mount option.
5
When was CVE-2025-21963 disclosed?
CVE-2025-21963 was disclosed as part of ongoing security improvements in the Linux kernel to prevent integer overflow vulnerabilities.