CVE-2026-88839 is a vulnerability in Red Hat Hummingbird
Published on September 23, 2026
Busybox: busybox: passwd/group parser writes heap pointers out of bounds due to stale tokenize() endpoint
BusyBox passwd/group tokenize() references a stale endpoint pointer after trimming, causing an out-of-bounds write of heap pointers.
Vulnerability Analysis
CVE-2026-88839 can be exploited with local system access, and requires user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Timeline
Reported to Red Hat.
Made public. 14 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-2026-88839 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2026-88839
Want to know whenever a new CVE is published for Red Hat Hummingbird? stack.watch will email you.