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Review reviewHigh

CVE-2025-38079

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: algif_hash - fix double free in hash_accept If accept(2) is called on socket type algif_hash with MSG_MORE flag set and crypto_ahash_import fails, sk2 is freed. However, it is also freed in af_alg_release, leading to slab-use-after-free error.

CVSS
7.8
EPSS
0.18%
7.64% percentile
CISA KEV
Not listed
Published
2025.06.18
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.18%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: crypto: algif_hash - fix double free in hash_accept If accept(2) is called on socket type algif_hash with MSG_MORE flag set and crypto_ahash_import fails, sk2 is freed. However, it is also freed in af_alg_release, leading to slab-use-after-free error.

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
>= fe869cdb89c95d060c77eea20204d6c91f233b53 < 5bff312b59b3f2a54ff504e4f4e47272b64f3633, >= fe869cdb89c95d060c77eea20204d6c91f233b53 < bf7bba75b91539e93615f560893a599c1e1c98bf, >= fe869cdb89c95d060c77eea20204d6c91f233b53 < c3059d58f79fdfb2201249c2741514e34562b547, >= fe869cdb89c95d060c77eea20204d6c91f233b53 < f0f3d09f53534ea385d55ced408f2b67059b16e4, >= fe869cdb89c95d060c77eea20204d6c91f233b53 < 134daaba93193df9e988524b5cd2f52d15eb1993, >= fe869cdb89c95d060c77eea20204d6c91f233b53 < 2f45a8d64fb4ed4830a4b3273834ecd6ca504896, >= fe869cdb89c95d060c77eea20204d6c91f233b53 < 0346f4b742345d1c733c977f3a7aef5a6419a967, >= fe869cdb89c95d060c77eea20204d6c91f233b53 < b2df03ed4052e97126267e8c13ad4204ea6ba9b6, >= 2.6.38, >= V3.1.5, >= 2.6.38 < 5.4.294, >= 5.5 < 5.10.238, >= 5.11 < 5.15.185, >= 5.16 < 6.1.141, >= 6.2 < 6.6.93, >= 6.7 < 6.12.31, >= 6.13 < 6.14.9, 6.15, 11.0
Fixed versions
5.4.294, 5.10.238, 5.15.185, 6.1.141, 6.6.93, 6.12.31, 6.14.9

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
CWE-415