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Review reviewHigh

CVE-2022-50650

Linux

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix reference state management for synchronous callbacks Currently, verifier verifies callback functions (sync and async) as if they will be executed once, (i.e. it explores execution state as if the function was being called once). The next insn to explore is set to start of subprog and the exit from nested frame is handled using curframe > 0 and prepare_func_exit. In case of async callback it uses a customized variant of push_stack simulating a kind of branch to set up custom state and execution context for the async...

CVSS
7.8
EPSS
0.14%
4.14% percentile
CISA KEV
Not listed
Published
2025.12.09
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.14%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix reference state management for synchronous callbacks Currently, verifier verifies callback functions (sync and async) as if they will be executed once, (i.e. it explores execution state as if the function was being called once). The next insn to explore is set to start of subprog and the exit from nested frame is handled using curframe > 0 and prepare_func_exit. In case of async callback it uses a customized variant of push_stack simulating a kind of branch to set up custom state and execution context for the async...

Affected product and versions

Product
Linux
Affected versions
>= 69c087ba6225b574afb6e505b72cb75242a3d844 < 4ed5155043c97ac8912bcf67331df87c833fb067, >= 69c087ba6225b574afb6e505b72cb75242a3d844 < caa176c0953cdfd5ce500fb517ce1ea924a8bc4c, >= 69c087ba6225b574afb6e505b72cb75242a3d844 < aed931fd3b6e28f19cc140ff90aa5046ee2aa4e1, >= 69c087ba6225b574afb6e505b72cb75242a3d844 < 9d9d00ac29d0ef7ce426964de46fa6b380357d0a, >= 5.13
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-2022-50650 — Linux | SECUFOCUS NOW