CVE-2025-21963
cifs: Fix integer overflow while processing acdirmax mount option
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In the Linux kernel, the following vulnerability has been resolved: cifs: Fix integer overflow while processing acdirmax mount option User-provided mount parameter acdirmax 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.
In the Linux kernel, the following vulnerability has been resolved: cifs: Fix integer overflow while processing acdirmax mount option User-provided mount parameter acdirmax 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.
Michael Randrianantenaina discovered that the Bluetooth driver in the Linux Kernel contained an improper access control vulnerability. A nearby attacker could use this to connect a rougue device and possibly execute arbitrary code. It was discovered that the CIFS network file system implementation in the Linux kernel did not properly verify the target namespace when handling upcalls. An attacker could use this to expose sensitive information.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2024-12-29 CVE Reserved
- 2025-04-01 CVE Published
- 2025-05-04 CVE Updated
- 2025-06-08 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-190: Integer Overflow or Wraparound
CAPEC
References (9)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/4c9f948142a550af416a2bfb5e56d29ce29e92cf | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2025-21963 | 2025-06-16 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2356642 | 2025-06-16 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.12 < 5.15.180 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.12 < 5.15.180" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.12 < 6.1.132 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.12 < 6.1.132" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.12 < 6.6.84 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.12 < 6.6.84" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.12 < 6.12.20 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.12 < 6.12.20" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.12 < 6.13.8 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.12 < 6.13.8" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.12 < 6.14 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.12 < 6.14" | en |
Affected
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