UBUNTU-CVE-2025-21963
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.
02 / AFFECTED SOFTWARE
Affected packages
11 explicit affected versions
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11 explicit affected versions
24 explicit affected versions
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68 explicit affected versions
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1 explicit affected versions
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10 explicit affected versions
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29 explicit affected versions
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78 explicit affected versions
11 explicit affected versions
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03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/5b29891f91dfb8758baf1e2217bef4b16b2b165b
- https://ubuntu.com/security/CVE-2025-21963
- https://ubuntu.com/security/notices/USN-7591-1
- https://ubuntu.com/security/notices/USN-7591-2
- https://ubuntu.com/security/notices/USN-7591-3
- https://ubuntu.com/security/notices/USN-7591-4
- https://ubuntu.com/security/notices/USN-7591-5
- https://ubuntu.com/security/notices/USN-7591-6
- https://ubuntu.com/security/notices/USN-7592-1
- https://ubuntu.com/security/notices/USN-7593-1
- https://ubuntu.com/security/notices/USN-7597-1
- https://ubuntu.com/security/notices/USN-7597-2
- https://ubuntu.com/security/notices/USN-7598-1
- https://ubuntu.com/security/notices/USN-7602-1
- https://ubuntu.com/security/notices/USN-7605-1
- https://ubuntu.com/security/notices/USN-7605-2
- https://ubuntu.com/security/notices/USN-7606-1
- https://ubuntu.com/security/notices/USN-7628-1
- https://ubuntu.com/security/notices/USN-7655-1
- https://ubuntu.com/security/notices/USN-7764-1
- https://ubuntu.com/security/notices/USN-7764-2
- https://ubuntu.com/security/notices/USN-7765-1
- https://ubuntu.com/security/notices/USN-7766-1
- https://ubuntu.com/security/notices/USN-7767-1
- https://ubuntu.com/security/notices/USN-7767-2
- https://ubuntu.com/security/notices/USN-7779-1
- https://ubuntu.com/security/notices/USN-7790-1
- https://ubuntu.com/security/notices/USN-7800-1
- https://ubuntu.com/security/notices/USN-7801-1
- https://ubuntu.com/security/notices/USN-7801-2
- https://ubuntu.com/security/notices/USN-7801-3
- https://ubuntu.com/security/notices/USN-7802-1
- https://ubuntu.com/security/notices/USN-7809-1
- https://www.cve.org/CVERecord?id=CVE-2025-21963