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Review reviewHigh

CVE-2022-50490

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: bpf: Propagate error from htab_lock_bucket() to userspace In __htab_map_lookup_and_delete_batch() if htab_lock_bucket() returns -EBUSY, it will go to next bucket. Going to next bucket may not only skip the elements in current bucket silently, but also incur out-of-bound memory access or expose kernel memory to userspace if current bucket_cnt is greater than bucket_size or zero. Fixing it by stopping batch operation and returning -EBUSY when htab_lock_bucket() fails, and the application can retry or skip the busy batch as ne...

CVSS
7.1
EPSS
0.15%
4.55% percentile
CISA KEV
Not listed
Published
2025.10.05
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.15%
Technical severityCVSS 7.1

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: bpf: Propagate error from htab_lock_bucket() to userspace In __htab_map_lookup_and_delete_batch() if htab_lock_bucket() returns -EBUSY, it will go to next bucket. Going to next bucket may not only skip the elements in current bucket silently, but also incur out-of-bound memory access or expose kernel memory to userspace if current bucket_cnt is greater than bucket_size or zero. Fixing it by stopping batch operation and returning -EBUSY when htab_lock_bucket() fails, and the application can retry or skip the busy batch as ne...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 20b6cc34ea74b6a84599c1f8a70f3315b56a1883 < 0e13425104903970a5ede853082d3bbb4edec6f3, >= 20b6cc34ea74b6a84599c1f8a70f3315b56a1883 < 6bfee6eb3d6b96ae730a542909dd22b5f9f50d58, >= 20b6cc34ea74b6a84599c1f8a70f3315b56a1883 < 4f1f39a8f1ce1b24fee6852d7dcd704ce7c4334d, >= 20b6cc34ea74b6a84599c1f8a70f3315b56a1883 < 66a7a92e4d0d091e79148a4c6ec15d1da65f4280, >= 5.11, >= 5.11 < 5.15.75, >= 5.16 < 5.19.17, >= 6.0 < 6.0.3
Fixed versions
5.15.75, 5.19.17, 6.0.3

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, 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