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Advisory severityHigh7.0Red Hat Linux

High [CVE-2026-53356] Fix phys BO pread/pwrite with offset

This high-severity Red Hat Linux advisory covers CVE-2026-53356 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat package: kernel-rt.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-53356 Source published Source updated

VulniPulse record published Record updated

CVE-2026-53356
Affected products & platforms
Red Hat LinuxLinux Kernel
Open source advisory

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/i915/gem: Fix phys BO pread/pwrite with offset sg_page() returns struct page pointer not (void *) so the scaling of pread/pwrite is wrong for phys BO and wrong parts of BO would be accessed if non-zero offset is used.

Last impacted platform with overlay or cursor planes using phys mapping was Gen3/945G/Lakeport. (cherry picked from commit 3e49a2f85070b2fb672c1e0fdba281a4ea3aebe6) This vulnerability occurs because the `sg_page()` function incorrectly scales `pread/pwrite` operations for physical Buffer Objects (BO) when a non-zero offset is used.

This can lead to incorrect memory access, potentially allowing an attacker to read or write to unintended memory regions. Such access could result in information disclosure or data corruption.

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-823.

Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9. Red Hat fixing advisory: RHSA-2026:57251, RHSA-2026:57252.

Affected products named by the advisory: Red Hat package: kernel-rt.

Is CVE-2026-53356 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-53356 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-53356?

Upgrade to a fixed release named by Red Hat:

  • kernel-0:6.12.0-211.49.1.el10_2
  • kernel-0:5.14.0-687.41.1.el9_8
  • RHSA-2026:57251
  • RHSA-2026:57252

Confirm against the vendor advisory before you patch.

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 13 days ago·verify at source

Fixed versions
  • kernel-0:6.12.0-211.49.1.el10_2
  • kernel-0:5.14.0-687.41.1.el9_8
  • RHSA-2026:57251
  • RHSA-2026:57252

Official advisory · high-confidence parse· fetched 13 days ago·verify at source

Mitigation

Upgrade to a fixed release: kernel-0:6.12.0-211.49.1.el10_2, kernel-0:5.14.0-687.41.1.el9_8, RHSA-2026:57251, RHSA-2026:57252. That is the remediation for this advisory.

The vendor advisory may list interim mitigations or workarounds not captured here. Review it before change work.

Official advisory · high-confidence parse· fetched 13 days ago·verify at source

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