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. (CVE-2026-71972)
U-Boot versions up to 2026.10-rc5 have an out-of-bounds write vulnerability in the video_display_rle8_bitmap function located in drivers/video/video_bmp.c. This flaw allows an attacker to supply a specially crafted RLE8-compressed BMP image that can corrupt memory adjacent to the framebuffer, potentially causing the bootloader to crash. The vulnerability has a CVSS score of 5.9, indicating medium severity.
AI Analysis
Technical Summary
The vulnerability identified as CVE-2026-71972 affects U-Boot through version 2026.10-rc5. It is an out-of-bounds write issue in the video_display_rle8_bitmap function within the drivers/video/video_bmp.c source file. An attacker can exploit this by providing a crafted RLE8-compressed BMP image, which leads to memory corruption adjacent to the framebuffer and results in a bootloader crash. The CVSS 3.1 vector is AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H, reflecting a medium severity with high attack complexity and no confidentiality impact but integrity and availability impacts.
Potential Impact
Exploitation of this vulnerability can cause a denial of service by crashing the U-Boot bootloader due to memory corruption. There is no direct confidentiality impact, but integrity and availability are affected. No known exploits are reported in the wild.
Mitigation Recommendations
No explicit patch or remediation details are provided in the input data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid processing untrusted RLE8-compressed BMP images in the affected U-Boot versions.
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. (CVE-2026-71972)
Description
U-Boot versions up to 2026.10-rc5 have an out-of-bounds write vulnerability in the video_display_rle8_bitmap function located in drivers/video/video_bmp.c. This flaw allows an attacker to supply a specially crafted RLE8-compressed BMP image that can corrupt memory adjacent to the framebuffer, potentially causing the bootloader to crash. The vulnerability has a CVSS score of 5.9, indicating medium severity.
CVSS v3.1
Score 5.9medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability identified as CVE-2026-71972 affects U-Boot through version 2026.10-rc5. It is an out-of-bounds write issue in the video_display_rle8_bitmap function within the drivers/video/video_bmp.c source file. An attacker can exploit this by providing a crafted RLE8-compressed BMP image, which leads to memory corruption adjacent to the framebuffer and results in a bootloader crash. The CVSS 3.1 vector is AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H, reflecting a medium severity with high attack complexity and no confidentiality impact but integrity and availability impacts.
Potential Impact
Exploitation of this vulnerability can cause a denial of service by crashing the U-Boot bootloader due to memory corruption. There is no direct confidentiality impact, but integrity and availability are affected. No known exploits are reported in the wild.
Mitigation Recommendations
No explicit patch or remediation details are provided in the input data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid processing untrusted RLE8-compressed BMP images in the affected U-Boot versions.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-9fh8-rw5q-p54v
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-71972"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6abc5d49680226ef6899ba8c
Added to database: 09/30/2026, 00:52:25 UTC
Last enriched: 09/30/2026, 01:06:55 UTC
Last updated: 09/30/2026, 02:06:41 UTC
Views: 8
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