Buffer overflow in U-Boot
CVE-2026-71972
U-Boot through 2026.10-rc5 contains an out-of-bounds write vulnerability in the video_display_rle8_bitmap function in drivers/video/video_bmp.c. Attackers can supply a crafted RLE8-compressed BMP image to corrupt memory adjacent to the framebuffer and crash the bootloader.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/u-boot/u-boot/commit/5201e83342d64c2f438ea35158575f28225e752e (patch)
- github.com/u-boot/u-boot/blob/v2026.10-rc5/drivers/video/video_bmp.c (technical-description)
- github.com/u-boot/u-boot (product)
- www.vulncheck.com/advisories/u-boot-through-2026.10-rc5-out-of-bounds-write-in-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-71972?
- CVE-2026-71972 is a medium-severity vulnerability in U-Boot, classified under Out-of-bounds Write. CVSS score: 5.9/10. Published 2026-09-29.
- How severe is CVE-2026-71972?
- Medium severity. CVSS v3 base score is 5.9 out of 10.