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Review reviewHigh

CVE-2024-27050

Linux Linux, acrn, linux_kernel

In the Linux kernel, the following vulnerability has been resolved: libbpf: Use OPTS_SET() macro in bpf_xdp_query() When the feature_flags and xdp_zc_max_segs fields were added to the libbpf bpf_xdp_query_opts, the code writing them did not use the OPTS_SET() macro. This causes libbpf to write to those fields unconditionally, which means that programs compiled against an older version of libbpf (with a smaller size of the bpf_xdp_query_opts struct) will have its stack corrupted by libbpf writing out of bounds. The patch adding the feature_flags field has an early bail out if the feature_fla...

CVSS
7.8
EPSS
0.28%
20.4% percentile
CISA KEV
Not listed
Published
2024.05.01
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.28%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: libbpf: Use OPTS_SET() macro in bpf_xdp_query() When the feature_flags and xdp_zc_max_segs fields were added to the libbpf bpf_xdp_query_opts, the code writing them did not use the OPTS_SET() macro. This causes libbpf to write to those fields unconditionally, which means that programs compiled against an older version of libbpf (with a smaller size of the bpf_xdp_query_opts struct) will have its stack corrupted by libbpf writing out of bounds. The patch adding the feature_flags field has an early bail out if the feature_fla...

Affected product and versions

Product
Linux Linux, acrn, linux_kernel
Affected versions
>= 13ce2daa259a3bfbc9a5aeeee8b9a87058703731 < fa5bef5e80c6a3321b2b1a7070436f3bc5daf07c, >= 13ce2daa259a3bfbc9a5aeeee8b9a87058703731 < 682ddd62abd4bdcee7584246903e7a2df005fe0d, >= 13ce2daa259a3bfbc9a5aeeee8b9a87058703731 < cd3be9843247edb8fc6fcd8d8237cbce2bc19f5e, >= 13ce2daa259a3bfbc9a5aeeee8b9a87058703731 < 92a871ab9fa59a74d013bc04f321026a057618e7, >= 6.6, >= 6.6 < 6.6.23, >= 6.7 < 6.7.11, >= 6.8 < 6.8.2
Fixed versions
6.6.23, 6.7.11, 6.8.2

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, acrn, 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:H/A:H
CWE
CWE-787