What’s Vulnerable › Vulnerabilities

CVE-2025-68724: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-24 · updated 2026-10-15

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.

Affected products

• Linux kernel: 3.18 — fixed in 6.19

How to fix

Upgrade to a fixed version: Linux kernel 6.19. Check the vendor advisory for mitigations.

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
• https://cert-portal.siemens.com/productcert/html/ssa-019113.html
• https://cert-portal.siemens.com/productcert/html/ssa-457936.html

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