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Review reviewHigh

CVE-2024-58240

Linux Linux, SIMATIC CN 4100, linux kernel

In the Linux kernel, the following vulnerability has been resolved: tls: separate no-async decryption request handling from async If we're not doing async, the handling is much simpler. There's no reference counting, we just need to wait for the completion to wake us up and return its result. We should preferably also use a separate crypto_wait. I'm not seeing a UAF as I did in the past, I think aec7961916f3 ("tls: fix race between async notify and socket close") took care of it. This will make the next fix easier.

CVSS
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2025.08.28
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: tls: separate no-async decryption request handling from async If we're not doing async, the handling is much simpler. There's no reference counting, we just need to wait for the completion to wake us up and return its result. We should preferably also use a separate crypto_wait. I'm not seeing a UAF as I did in the past, I think aec7961916f3 ("tls: fix race between async notify and socket close") took care of it. This will make the next fix easier.

Affected product and versions

Product
Linux Linux, SIMATIC CN 4100, linux kernel
Affected versions
>= 3c4d7559159bfe1e3b94df3a657b2cda3a34e218 < 48905146d11dbf1ddbb2967319016a83976953f5, >= 3c4d7559159bfe1e3b94df3a657b2cda3a34e218 < dec5b6e7b211e405d3bcb504562ab21aa7e5a64d, >= 3c4d7559159bfe1e3b94df3a657b2cda3a34e218 < 999115298017a675d8ddf61414fc7a85c89f1186, >= 3c4d7559159bfe1e3b94df3a657b2cda3a34e218 < 41532b785e9d79636b3815a64ddf6a096647d011, >= 4.13, < V5.0, >= 4.13 < 6.1.149, >= 6.2 < 6.6.21, >= 6.7 < 6.7.9, 6.8, 11.0
Fixed versions
6.1.149, 6.6.21, 6.7.9

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, SIMATIC CN 4100, linux kernel 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-416