Security readout for executives and security teams
Plain-English summary
A local, low-privileged user may trigger a use-after-free in the Linux kernel’s BPF arena memory handling. Successful exploitation could compromise system confidentiality, integrity, and availability. The issue is rated CVSS 7.8, but the supplied sources do not establish active exploitation.
Executive priority
Treat as a high-priority kernel update for shared, multi-user, development, and other locally accessible Linux systems. Internet-facing status alone does not determine exposure because exploitation is local. Validate vendor backports promptly, then patch during the next expedited maintenance window unless local access is strongly controlled.
Technical view
BPF arena mapping logic failed to account for mremap operations. Multiple mmap events could leave arena_vm_close without correct reference tracking, causing a use-after-free. The cited kernel changes add reference counting. The CVSS vector indicates local access, low complexity, low privileges, no user interaction, and potentially high impact.
Likely exposure
Exposure is limited to Linux systems running an affected kernel where a low-privileged local user can reach the vulnerable BPF arena behavior. The bundle identifies Linux 6.9-related versions and 6.10, but its normalized version encoding is ambiguous. Confirm exact distribution packages and backports with the vendor.
Exploitation context
The supplied record is not marked as included in CISA KEV, and no cited source reports active exploitation. This does not prove exploitation is absent. The attack requires local, low-privileged access rather than direct unauthenticated network access, reducing internet-wide exposure while leaving shared or multi-user systems more concerning.
Researcher notes
The vulnerable lifetime transition involves BPF arena mappings, mremap, and arena_vm_close. Review mapping reference ownership and vendor backports against the two cited stable commits. The bundle provides no CWE, exploit evidence, or unambiguous fixed-release mapping, so avoid inferring a universal vulnerable-version range from upstream version numbers alone.
Mitigation direction
- Install a vendor-supported kernel containing the cited BPF arena reference-counting fix.
- Consult the Linux distribution vendor for the exact corrected package and backport status.
- Prioritize shared systems and hosts where untrusted users receive local access.
- Until patched, restrict unnecessary local accounts and BPF access where operationally feasible.
Validation and detection
- Inventory the running kernel release and distribution package on every potentially affected host.
- Compare each package against current vendor advisories and corrected-version guidance.
- Confirm the installed kernel contains one of the cited stable fix commits or an equivalent backport.
- Reboot after updating and verify the patched kernel is actually running.
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
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
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.
CVE-2024-42075 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
1 official scoreWe 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:H1.85.9LinuxVulnerability 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
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/87496a1b01e8e2e399428c0db25e106f7961d01eCVE reference, Linux
- https://git.kernel.org/stable/c/b90d77e5fd784ada62ddd714d15ee2400c28e1cfCVE 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.