CVE-2025-68724
Published Dec 24, 2025
Modified Apr 15, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id Use check_add_overflow() to guard against potential integer overflows when adding the binary blob lengths and the size of an asymmetric_key_id structure and return ERR_PTR(-EOVERFLOW) accordingly. This prevents a possible buffer overflow when copying data from potentially malicious X.509 certificate fields that can be arbitrarily large, such as ASN.1 INTEGER serial numbers, issuer names, etc.
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References
Other References
https://git.kernel.org/stable/c/5b8ac617c8dab5cad3c4dc8d84d0987808a0f99c
https://git.kernel.org/stable/c/60a7be5ee74408147e439164ac067e418ca74bb4
https://git.kernel.org/stable/c/6af753ac5205115e6c310c8c4236c01b59a1c44f
https://git.kernel.org/stable/c/b7090a5c153105b9fd221a5a81459ee8cd5babd6
https://git.kernel.org/stable/c/c13c6e9de91d7f1dd7df756b1fa5a1f968839d76
https://git.kernel.org/stable/c/c73be4f51eed98fa0c7c189db8f279e1c86bfbf7
https://git.kernel.org/stable/c/df0845cf447ae1556c3440b8b155de0926cbaa56
https://git.kernel.org/stable/c/dfc1613961828745165aec6552c3818fa14ab725
Frequently Asked Questions
What is CVE-2025-68724? +
In the Linux kernel, the following vulnerability has been resolved:
crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id
Use check_add_overflow() to guard against potential integer overflows
when adding the binary blob lengths and the size of an asymmetric_key_id
structure and return ERR_PTR(-EOVERFLOW) accordingly. This prevents a
possible buffer overflow when copying data from potentially malicious
X.509 certificate fields that can be arbitrarily large, such as ASN.1
INTEGER serial numbers, issuer names, etc.
How do I check if I'm vulnerable to CVE-2025-68724? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.