In the Linux kernel, the following vulnerability has been resolved:
drm/i915/gem: Fix Virtual Memory mapping boundaries calculation
Calculating the size of the mapped area as the lesser value
between the requested size and the actual size does not consider
the partial mapping offset. This can cause page fault access.
Fix the calculation of the starting and ending addresses, the
total size is now deduced from the difference between the end and
start addresses.
Additionally, the calculations have been rewritten in a clearer
and more understandable form.
[Joonas: Add Requires: tag]
Requires: 60a2066c5005 ("drm/i915/gem: Adjust vma offset for framebuffer mmap offset")
(cherry picked from commit 97b6784753da06d9d40232328efc5c5367e53417)
Security readout for executives and security teams
Plain-English summary
CVE-2024-42259 is a Linux kernel issue in the Intel i915 graphics memory-mapping path. A boundary calculation can be wrong when a partial mapping offset is used, causing page-fault access. The public sources do not provide CVSS, CWE, confirmed exploitation, or a complete impact statement.
Executive priority
Treat this as a kernel maintenance item requiring timely patch verification, not an emergency exploitation event. Priority should rise for shared workstations, multi-user Linux hosts, and vendor appliances where kernel patching lags.
Technical view
The flaw is in drm/i915/gem virtual memory mapping boundary calculation. The original logic used the lesser of requested and actual size without accounting for partial mapping offset. Stable kernel fixes recalculate start and end addresses, then derive total mapped size from their difference.
Likely exposure
Exposure is most relevant to Linux systems running affected kernel versions with the drm/i915 GEM path present. The source lists affected Linux version ranges and multiple stable fix commits, but does not provide distribution-by-distribution exposure details.
Exploitation context
The source bundle marks KEV as false and provides no cited evidence of active exploitation. A Project Zero issue is referenced, but the bundle does not establish public exploitation, exploit maturity, or remote attackability.
Researcher notes
Key uncertainty is impact. The advisory says the bug can cause page-fault access, but does not state confidentiality, integrity, availability, privilege escalation, or attack preconditions. Validate by code lineage and backport presence, not by version strings alone.
Mitigation direction
Apply vendor kernel updates containing the referenced stable fixes or backports.
Review Debian LTS and appliance vendor advisories for packaged kernel status.
Prioritize systems with Intel i915 graphics enabled or exposed to untrusted local users.
If no vendor package is available, monitor vendor guidance before custom kernel changes.
Validation and detection
Inventory kernel versions against the affected and fixed versions in vendor advisories.
Confirm installed kernels include one of the referenced stable fix commits or backports.
Check whether drm/i915 is enabled or loaded on potentially affected Linux systems.
Document exceptions where systems are not running affected kernels or i915 paths.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Potential ATT&CK relevance
Conservative CVE-to-ATT&CK context
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CVE-2024-42259 mapping review
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