Review reviewHigh

CVE-2024-38635

Linux Linux, SIMATIC S7-1500 TM MFP - GNU/Linux subsystem, linux kernel

In the Linux kernel, the following vulnerability has been resolved: soundwire: cadence: fix invalid PDI offset For some reason, we add an offset to the PDI, presumably to skip the PDI0 and PDI1 which are reserved for BPT. This code is however completely wrong and leads to an out-of-bounds access. We were just lucky so far since we used only a couple of PDIs and remained within the PDI array bounds. A Fixes: tag is not provided since there are no known platforms where the out-of-bounds would be accessed, and the initial code had problems as well. A follow-up patch completely removes this use...

CVSS
7.1
EPSS
0.24%
14.4% percentile
CISA KEV
Not listed
Published
2024.06.21
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.24%
Technical severityCVSS 7.1

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: soundwire: cadence: fix invalid PDI offset For some reason, we add an offset to the PDI, presumably to skip the PDI0 and PDI1 which are reserved for BPT. This code is however completely wrong and leads to an out-of-bounds access. We were just lucky so far since we used only a couple of PDIs and remained within the PDI array bounds. A Fixes: tag is not provided since there are no known platforms where the out-of-bounds would be accessed, and the initial code had problems as well. A follow-up patch completely removes this use...

Affected product and versions

Product
Linux Linux, SIMATIC S7-1500 TM MFP - GNU/Linux subsystem, linux kernel
Affected versions
>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 002364b2d594a9afc0385c09e00994c510b1d089, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < fd4bcb991ebaf0d1813d81d9983cfa99f9ef5328, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 902f6d656441a511ac25c6cffce74496db10a078, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2ebcaa0e5db9b6044bb487ae1cf41bc601761567, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 7eeef1e935d23db5265233d92395bd5c648a4021, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4e99103f757cdf636c6ee860994a19a346a11785, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 8ee1b439b1540ae543149b15a2a61b9dff937d91, < 5.4.278, < 5.10.219, < 5.15.161, < 6.1.93, < 6.6.33, < 6.9.4, >= 5.5 < 5.10.219, >= 5.11 < 5.15.161, >= 5.16 < 6.1.93, >= 6.2 < 6.6.33, >= 6.7 < 6.9.4
Fixed versions
5.4.278, 5.10.219, 5.15.161, 6.1.93, 6.6.33, 6.9.4

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, SIMATIC S7-1500 TM MFP - GNU/Linux subsystem, 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:N/A:H
CWE
CWE-125