---
id: CVE-2025-68724
title: 'crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id'
summary: |-
  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 b…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 7901c1a8effbe5f89673bfc09d6e37b8f334f1a7 <
    60a7be5ee74408147e439164ac067e418ca74bb4
  - >-
    Linux >= 7901c1a8effbe5f89673bfc09d6e37b8f334f1a7 <
    c13c6e9de91d7f1dd7df756b1fa5a1f968839d76
  - >-
    Linux >= 7901c1a8effbe5f89673bfc09d6e37b8f334f1a7 <
    dfc1613961828745165aec6552c3818fa14ab725
  - >-
    Linux >= 7901c1a8effbe5f89673bfc09d6e37b8f334f1a7 <
    5b8ac617c8dab5cad3c4dc8d84d0987808a0f99c
  - >-
    Linux >= 7901c1a8effbe5f89673bfc09d6e37b8f334f1a7 <
    c73be4f51eed98fa0c7c189db8f279e1c86bfbf7
  - >-
    Linux >= 7901c1a8effbe5f89673bfc09d6e37b8f334f1a7 <
    6af753ac5205115e6c310c8c4236c01b59a1c44f
  - >-
    Linux >= 7901c1a8effbe5f89673bfc09d6e37b8f334f1a7 <
    b7090a5c153105b9fd221a5a81459ee8cd5babd6
  - >-
    Linux >= 7901c1a8effbe5f89673bfc09d6e37b8f334f1a7 <
    df0845cf447ae1556c3440b8b155de0926cbaa56
  - Linux 3.18
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-06-16T19:22:49.497362Z'
published: '2025-12-24'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T08:43:18.690Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-68724'
references:
  - url: 'https://git.kernel.org/stable/c/60a7be5ee74408147e439164ac067e418ca74bb4'
  - url: 'https://git.kernel.org/stable/c/c13c6e9de91d7f1dd7df756b1fa5a1f968839d76'
  - url: 'https://git.kernel.org/stable/c/dfc1613961828745165aec6552c3818fa14ab725'
  - url: 'https://git.kernel.org/stable/c/5b8ac617c8dab5cad3c4dc8d84d0987808a0f99c'
  - url: 'https://git.kernel.org/stable/c/c73be4f51eed98fa0c7c189db8f279e1c86bfbf7'
  - url: 'https://git.kernel.org/stable/c/6af753ac5205115e6c310c8c4236c01b59a1c44f'
  - url: 'https://git.kernel.org/stable/c/b7090a5c153105b9fd221a5a81459ee8cd5babd6'
  - url: 'https://git.kernel.org/stable/c/df0845cf447ae1556c3440b8b155de0926cbaa56'
tags:
  - cve.org
epss: 0.00138
epssPercentile: 0.02594
ingestedAt: '2026-09-08T15:33:26.995Z'
---

## Overview

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

- `Linux >= 7901c1a8effbe5f89673bfc09d6e37b8f334f1a7 < 60a7be5ee74408147e439164ac067e418ca74bb4`
- `Linux >= 7901c1a8effbe5f89673bfc09d6e37b8f334f1a7 < c13c6e9de91d7f1dd7df756b1fa5a1f968839d76`
- `Linux >= 7901c1a8effbe5f89673bfc09d6e37b8f334f1a7 < dfc1613961828745165aec6552c3818fa14ab725`
- `Linux >= 7901c1a8effbe5f89673bfc09d6e37b8f334f1a7 < 5b8ac617c8dab5cad3c4dc8d84d0987808a0f99c`
- `Linux >= 7901c1a8effbe5f89673bfc09d6e37b8f334f1a7 < c73be4f51eed98fa0c7c189db8f279e1c86bfbf7`
- `Linux >= 7901c1a8effbe5f89673bfc09d6e37b8f334f1a7 < 6af753ac5205115e6c310c8c4236c01b59a1c44f`
- `Linux >= 7901c1a8effbe5f89673bfc09d6e37b8f334f1a7 < b7090a5c153105b9fd221a5a81459ee8cd5babd6`
- `Linux >= 7901c1a8effbe5f89673bfc09d6e37b8f334f1a7 < df0845cf447ae1556c3440b8b155de0926cbaa56`
- `Linux 3.18`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.