Security readout for executives and security teams
Plain-English summary
A compatibility bug in Linux libbpf can corrupt an application's stack when older software calls bpf_xdp_query() through a newer, vulnerable library. The resulting out-of-bounds writes could crash the process or compromise its confidentiality and integrity. The supplied CVSS score is 7.8, rated high.
Executive priority
Treat as a high-priority compatibility and memory-safety issue on hosts using XDP/libbpf, especially where locally accessible workloads process sensitive traffic. Patch through supported vendor channels after testing. Broad emergency action is not supported by the supplied evidence because active exploitation has not been reported.
Technical view
libbpf wrote feature_flags and xdp_zc_max_segs into bpf_xdp_query_opts without checking whether the caller's older, smaller structure contained those fields. The stable fixes use OPTS_SET() for size-aware assignments, preventing CWE-787 out-of-bounds stack writes.
Likely exposure
Exposure requires software compiled against an older libbpf structure layout to call bpf_xdp_query() using a vulnerable libbpf implementation. The bundle identifies affected Linux release points including 6.6, 6.6.23, 6.7.11, 6.8.2, and 6.9, but does not provide complete distribution-package mappings.
Exploitation context
The supplied record is not in CISA KEV and provides no evidence of active exploitation or a public exploit. Its CVSS vector describes a local, low-complexity condition requiring low privileges and no user interaction. Practical exploitability is not established by the sources.
Researcher notes
The vulnerable boundary is the caller-provided opts size, not merely the presence of the new fields. One earlier change checked feature_flags with OPTS_HAS(), while xdp_zc_max_segs lacked equivalent protection. The resolution consistently routes both writes through OPTS_SET(). Branch-specific fixed-release mapping remains incomplete in the supplied bundle.
Mitigation direction
- Install vendor-supported Linux or libbpf packages containing the corresponding stable fix.
- Prioritize systems running XDP applications built against older libbpf headers.
- Consult distribution advisories when package-to-upstream version mapping is unclear.
- Rebuild affected applications against supported headers where vendor guidance recommends it.
Validation and detection
- Inventory installed Linux and libbpf versions, including distribution backports.
- Identify applications calling bpf_xdp_query() and record their build-time libbpf headers.
- Confirm both affected assignments use OPTS_SET() in the deployed source or vendor patch.
- Exercise affected applications under memory-safety instrumentation in a controlled environment.
- Verify package provenance and restart affected applications after remediation.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-787: Exact CWE lookup
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Open ATT&CK lookupCVE-2024-27050 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
2 official scoresWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/fa5bef5e80c6a3321b2b1a7070436f3bc5daf07cCVE reference, Linux
- https://git.kernel.org/stable/c/682ddd62abd4bdcee7584246903e7a2df005fe0dCVE reference, Linux
- https://git.kernel.org/stable/c/cd3be9843247edb8fc6fcd8d8237cbce2bc19f5eCVE reference, Linux
- https://git.kernel.org/stable/c/92a871ab9fa59a74d013bc04f321026a057618e7CVE reference, Linux
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.