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.
References10
- git.kernel.org/stable/c/5b8ac617c8dab5cad3c4dc8d84d0987808a0f99c
- git.kernel.org/stable/c/60a7be5ee74408147e439164ac067e418ca74bb4
- git.kernel.org/stable/c/6af753ac5205115e6c310c8c4236c01b59a1c44f
- git.kernel.org/stable/c/b7090a5c153105b9fd221a5a81459ee8cd5babd6
- git.kernel.org/stable/c/c13c6e9de91d7f1dd7df756b1fa5a1f968839d76
- git.kernel.org/stable/c/c73be4f51eed98fa0c7c189db8f279e1c86bfbf7
- git.kernel.org/stable/c/df0845cf447ae1556c3440b8b155de0926cbaa56
- git.kernel.org/stable/c/dfc1613961828745165aec6552c3818fa14ab725
- cert-portal.siemens.com/productcert/html/ssa-019113.html
- cert-portal.siemens.com/productcert/html/ssa-457936.html
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 4 · as of 11 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.