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Review reviewHigh

CVE-2023-54173

Linux

In the Linux kernel, the following vulnerability has been resolved: bpf: Disable preemption in bpf_event_output We received report [1] of kernel crash, which is caused by using nesting protection without disabled preemption. The bpf_event_output can be called by programs executed by bpf_prog_run_array_cg function that disabled migration but keeps preemption enabled. This can cause task to be preempted by another one inside the nesting protection and lead eventually to two tasks using same perf_sample_data buffer and cause crashes like: BUG: kernel NULL pointer dereference, address: 00000000...

CVSS
7.8
EPSS
0.13%
3.29% percentile
CISA KEV
Not listed
Published
2025.12.30
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: bpf: Disable preemption in bpf_event_output We received report [1] of kernel crash, which is caused by using nesting protection without disabled preemption. The bpf_event_output can be called by programs executed by bpf_prog_run_array_cg function that disabled migration but keeps preemption enabled. This can cause task to be preempted by another one inside the nesting protection and lead eventually to two tasks using same perf_sample_data buffer and cause crashes like: BUG: kernel NULL pointer dereference, address: 00000000...

Affected product and versions

Product
Linux
Affected versions
>= 2a916f2f546ca1c1e3323e2a4269307f6d9890eb < 3048cb0dc0cc9dc74ed93690dffef00733bcad5b, >= 2a916f2f546ca1c1e3323e2a4269307f6d9890eb < c81bdf8f9f2b002d217c3d5357cdea9f2b82ff90, >= 2a916f2f546ca1c1e3323e2a4269307f6d9890eb < 36dd8ca330b76585640ed32255a3c99f901e1502, >= 2a916f2f546ca1c1e3323e2a4269307f6d9890eb < 063c9ce8e74e07bf94f99cd13146f42867875e8b, >= 2a916f2f546ca1c1e3323e2a4269307f6d9890eb < d62cc390c2e99ae267ffe4b8d7e2e08b6c758c32, >= 5.7
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 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-2023-54173 — Linux | SECUFOCUS NOW