High [CVE-2026-63879] fix amdgpu_hmm_range_get_pages
This high-severity Red Hat Linux advisory covers CVE-2026-63879 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.
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Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix amdgpu_hmm_range_get_pages The notifier sequence must only be read once or otherwise we could work with invalid pages.
While at it also fix the coding style, e.g. drop the pre-initialized return value and use the common define for 2G range. (cherry picked from commit c08972f555945cda57b0adb72272a37910153390) A flaw was found in the Linux kernel, specifically within the `drm/amdgpu` component.
This vulnerability arises from incorrect handling of a notifier sequence in the `amdgpu_hmm_range_get_pages` function, where the sequence can be read more than once. This can lead to the system processing invalid memory pages, potentially resulting in system instability or crashes.
Red Hat severity: Important — CVSS 7 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-824.
Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 7. Red Hat fixing advisory: RHSA-2026:57251, RHSA-2026:55765, RHSA-2026:55764, RHSA-2026:57252.
Affected products named by the advisory: Red Hat package: kernel-rt.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 6 days ago·verify at source
- kernel-0:6.12.0-211.49.1.el10_2
- kernel-rt-0:4.18.0-553.156.1.rt7.497.el8_10
- kernel-0:4.18.0-553.156.1.el8_10
- kernel-0:5.14.0-687.41.1.el9_8
- RHSA-2026:57251
- RHSA-2026:55765
- RHSA-2026:55764
- RHSA-2026:57252
Official advisory · high-confidence parse· fetched 6 days ago·verify at source
Mitigation
Upgrade to a fixed release: kernel-0:6.12.0-211.49.1.el10_2, kernel-rt-0:4.18.0-553.156.1.rt7.497.el8_10, kernel-0:4.18.0-553.156.1.el8_10, kernel-0:5.14.0-687.41.1.el9_8, RHSA-2026:57251, RHSA-2026:55765. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 6 days ago·verify at source
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