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Review reviewHigh

CVE-2025-38502

Linux Linux, SIMATIC CN 4100, linux kernel

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix oob access in cgroup local storage Lonial reported that an out-of-bounds access in cgroup local storage can be crafted via tail calls. Given two programs each utilizing a cgroup local storage with a different value size, and one program doing a tail call into the other. The verifier will validate each of the indivial programs just fine. However, in the runtime context the bpf_cg_run_ctx holds an bpf_prog_array_item which contains the BPF program as well as any cgroup local storage flavor the program uses. Helpers s...

CVSS
7.1
EPSS
-
- percentile
CISA KEV
Not listed
Published
2025.08.16
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.1

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix oob access in cgroup local storage Lonial reported that an out-of-bounds access in cgroup local storage can be crafted via tail calls. Given two programs each utilizing a cgroup local storage with a different value size, and one program doing a tail call into the other. The verifier will validate each of the indivial programs just fine. However, in the runtime context the bpf_cg_run_ctx holds an bpf_prog_array_item which contains the BPF program as well as any cgroup local storage flavor the program uses. Helpers s...

Affected product and versions

Product
Linux Linux, SIMATIC CN 4100, linux kernel
Affected versions
>= 7d9c3427894fe70d1347b4820476bf37736d2ff0 < c1c74584b9b4043c52e41fec415226e582d266a3, >= 7d9c3427894fe70d1347b4820476bf37736d2ff0 < 66da7cee78590259b400e51a70622ccd41da7bb2, >= 7d9c3427894fe70d1347b4820476bf37736d2ff0 < 7acfa07c585e3d7a64654d38f0a5c762877d0b9b, >= 7d9c3427894fe70d1347b4820476bf37736d2ff0 < 41688d1fc5d163a6c2c0e95c0419e2cb31a44648, >= 7d9c3427894fe70d1347b4820476bf37736d2ff0 < 19341d5c59e8c7e8528e40f8663e99d67810473c, >= 7d9c3427894fe70d1347b4820476bf37736d2ff0 < abad3d0bad72a52137e0c350c59542d75ae4f513, >= 5.9, < V5.0, >= 5.9 < 5.15.192, >= 5.16 < 6.1.151, >= 6.2 < 6.6.105, >= 6.7 < 6.12.46, >= 6.13 < 6.16.1, 11.0, < 5.0
Fixed versions
5.15.192, 6.1.151, 6.6.105, 6.12.46, 6.16.1, 5.0

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:N/A:H
CWE
CWE-125