Vulnerability · Published Sep 29, 2026 · Assigned by VulnCheck
CVE-2026-71972U-Boot through 2026.10-rc5 Out-of-Bounds Write in BMP RLE8 Decoder
Medium 5.9
In plain English
A medium-severity out-of-bounds write in u-boot from u-boot. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities).
Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)0.2%top 87.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | u-boot | no fix listed | DEBIAN-CVE-2026-71972 |
| Debian:13 | u-boot | no fix listed | DEBIAN-CVE-2026-71972 |
| Debian:14 | u-boot | no fix listed | DEBIAN-CVE-2026-71972 |
| Ubuntu:22.04:LTS | u-boot | no fix listed | UBUNTU-CVE-2026-71972 |
| Ubuntu:24.04:LTS | u-boot | no fix listed | UBUNTU-CVE-2026-71972 |
| Ubuntu:26.04:LTS | u-boot | no fix listed | UBUNTU-CVE-2026-71972 |
| Ubuntu:26.10 | u-boot | no fix listed | UBUNTU-CVE-2026-71972 |
| Ubuntu:22.04:LTS | u-boot-nezha | no fix listed | UBUNTU-CVE-2026-71972 |
| Ubuntu:24.04:LTS | u-boot-nezha | no fix listed | UBUNTU-CVE-2026-71972 |
Affected products (as reported)
Weakness: CWE-787 · Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
References
- https://github.com/u-boot/u-boot/commit/5201e83342d64c2f438ea35158575f28225e752e patch
- https://github.com/u-boot/u-boot/blob/v2026.10-rc5/drivers/video/video_bmp.c#L126 technical-description
- https://github.com/u-boot/u-boot product
- VulnCheck Advisory: U-Boot through 2026.10-rc5 Out-of-Bounds Write in BMP RLE8 Decoder third-party-advisory