Stack OOB Write in gfs2-utils (Red Hat)
CVE-2026-71220 Published on September 3, 2026
Gfs2-utils: gfs2-utils: stack out-of-bounds write via unchecked di_height in gfs2_edit
A stack out-of-bounds write vulnerability was found in gfs2-utils. In gfs2_edit, the di_height field from on-disk inode metadata is used as an array index without bounds checking, causing a stack buffer overflow that may lead to arbitrary code execution when processing crafted GFS2 filesystem images.
Vulnerability Analysis
CVE-2026-71220 is exploitable with local system access, requires user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Timeline
Reported to Red Hat.
Made public. 85 days later.
Weakness Type
What is a Memory Corruption Vulnerability?
The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.
CVE-2026-71220 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2026-71220
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