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Review reviewHigh

CVE-2025-68724

Linux Linux, SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP

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.

CVSS
7.8
EPSS
0.13%
2.55% percentile
CISA KEV
Not listed
Published
2025.12.24
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.13%
Technical severityCVSS 7.8

Vulnerability 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 product and versions

Product
Linux Linux, SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
Affected versions
>= 7901c1a8effbe5f89673bfc09d6e37b8f334f1a7 < 60a7be5ee74408147e439164ac067e418ca74bb4, >= 7901c1a8effbe5f89673bfc09d6e37b8f334f1a7 < c13c6e9de91d7f1dd7df756b1fa5a1f968839d76, >= 7901c1a8effbe5f89673bfc09d6e37b8f334f1a7 < dfc1613961828745165aec6552c3818fa14ab725, >= 7901c1a8effbe5f89673bfc09d6e37b8f334f1a7 < 5b8ac617c8dab5cad3c4dc8d84d0987808a0f99c, >= 7901c1a8effbe5f89673bfc09d6e37b8f334f1a7 < c73be4f51eed98fa0c7c189db8f279e1c86bfbf7, >= 7901c1a8effbe5f89673bfc09d6e37b8f334f1a7 < 6af753ac5205115e6c310c8c4236c01b59a1c44f, >= 7901c1a8effbe5f89673bfc09d6e37b8f334f1a7 < b7090a5c153105b9fd221a5a81459ee8cd5babd6, >= 7901c1a8effbe5f89673bfc09d6e37b8f334f1a7 < df0845cf447ae1556c3440b8b155de0926cbaa56, >= 3.18, >= V3.1.6
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available
CVE-2025-68724 — Linux Linux, SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | SECUFOCUS NOW