High [CVE-2026-45984] Fix use-after-free in iomap inline data write path
This high-severity Red Hat Linux advisory covers CVE-2026-45984 affecting Red Hat Enterprise Linux AppStream E4S (v.9.4), Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat Enterprise Linux AppStream (v. 9).
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Summary
Fix use-after-free in iomap inline data write path. Red Hat rates this important (CVSS 7.8).
Weakness: CWE-826. Affected package(s): kernel.
Resolved in Red Hat advisory RHSA-2026:33743 — update the affected packages (`sudo dnf update`).
Affected products named by the advisory: Red Hat Enterprise Linux AppStream E4S (v.9.4); Red Hat Enterprise Linux AppStream EUS (v.9.6); Red Hat Enterprise Linux AppStream (v. 9); Red Hat Enterprise Linux BaseOS (v. 8); and 23 more.
- kernel-0:5.14.0-687.17.1.el9_8
- kernel-0:4.18.0-553.139.1.el8_10
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- RHSA-2026:33743
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- Update the affected package(s) to the fixed version shipped in RHSA-2026:33743 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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