Description
In the Linux kernel, the following vulnerability has been resolved: fbdev: fix potential buffer overflow in do_register_framebuffer() The current implementation may lead to buffer overflow when: 1. Unregistration creates NULL gaps in registered_fb[] 2. All array slots become occupied despite num_registered_fb < FB_MAX 3. The registration loop exceeds array bounds Add boundary check to prevent registered_fb[FB_MAX] access.
Affected products
linux: linux kernel; debian: debian linux
References9
- git.kernel.org/stable/c/248b2aab9b2af5ecf89d9d7955a2ff20c4b4a399 Patch
- git.kernel.org/stable/c/2828a433c7d7a05b6f27c8148502095101dd0b09 Patch
- git.kernel.org/stable/c/523b84dc7ccea9c4d79126d6ed1cf9033cf83b05 Patch
- git.kernel.org/stable/c/5c3f5a25c62230b7965804ce7a2e9305c3ca3961 Patch
- git.kernel.org/stable/c/806f85bdd3a60187c21437fc51baace11f659f35 Patch
- git.kernel.org/stable/c/cbe740de32bb0fb7a5213731ff5f26ea6718fca3 Patch
- lists.debian.org/debian-lts-announce/2025/10/msg00008.html Third Party Advisory
- cert-portal.siemens.com/productcert/html/ssa-032379.html
- cert-portal.siemens.com/productcert/html/ssa-082556.html
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 10 · as of 8 November 2026
- CWE
- CWE-787
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.