High [CVE-2026-71223] integer overflow in resource group allocation size on 32-bit platforms
This high-severity Red Hat Linux advisory covers CVE-2026-71223.
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Summary
An integer overflow vulnerability was found in gfs2-utils. The resource group allocation size computation on 32-bit platforms causes an undersized buffer allocation followed by heap out-of-bounds writes when processing crafted GFS2 filesystem images.
This vulnerability does not affect 64-bit builds. This vulnerability is assessed as Moderate impact because it requires a 32-bit platform to trigger.
All standard RHEL 8+ architectures (x86_64, aarch64, ppc64le, s390x) are 64-bit and not affected. The vulnerability is applicable only to legacy 32-bit builds or embedded environments.
On affected 32-bit platforms, the integer overflow leads to heap corruption with controlled writes, which could potentially enable code execution. Red Hat severity: Moderate — CVSS 7 (CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H).
Weakness: CWE-190. Red Hat lists Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9 as not affected.
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 1 hour ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Mitigation checklist
- Use 64-bit builds of gfs2-utils (default on all RHEL 8+ architectures). Do not build or run gfs2-utils in 32-bit mode when processing untrusted filesystem images.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
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