Kernel-memory disclosure via unchecked DRM pat_index
Published May 6, 2026 · Updated May 6, 2026
Out-of-bounds read in Linux Kernel 6.18 through 6.18.15 and 6.19 through 6.19.5 allows local users to read kernel memory via a DRM ioctl. madvise_args_are_sane() passes an unchecked pat_index to xe_pat_index_get_coh_mode(), which indexes xe->pat.table before bounds validation. Low local privileges and access to the DRM node are required; the record identifies kernel-memory disclosure and availability loss but does not specify its failure mode.
Summary
What happened
Out-of-bounds read in Linux Kernel 6.18 through 6.18.15 and 6.19 through 6.19.5 allows local users to read kernel memory via a DRM ioctl. madvise_args_are_sane() passes an unchecked pat_index to xe_pat_index_get_coh_mode(), which indexes xe->pat.table before bounds validation. Low local privileges and access to the DRM node are required; the record identifies kernel-memory disclosure and availability loss but does not specify its failure mode.
The record
- CVE
- CVE-2026-43280
- Published
- May 6, 2026
- Updated
- May 6, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- CWE-125
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- May 6, 2026CVE publishedPublication date reported by the CVE source.
- May 6, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=6.18
- Affected versionversion=ada7486c5668db542a7d361268df931aca5b726a <79f52655567a6471ff3d0d6325ede91bb14461f4
- Affected versionversion=ada7486c5668db542a7d361268df931aca5b726a <fbbe32618e97eff81577a01eb7d9adcd64a216d7
- Affected versionversion=ada7486c5668db542a7d361268df931aca5b726a <ffba51100ff61792fefbae11ca38ac1987a818dd
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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