High 7.8Published Sep 4, 2025

CVE-2025-38702fbdev: fix potential buffer overflow in do_register_framebuffer()

Updated under an hour ago (Oct 26, 2026, 2:50 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 14, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 5c3f5a25c62230b7965804ce7a2e9305c3ca3961; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before cbe740de32bb0fb7a5213731ff5f26ea6718fca3; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 806f85bdd3a60187c21437fc51baace11f659f35; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 2828a433c7d7a05b6f27c8148502095101dd0b09; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 248b2aab9b2af5ecf89d9d7955a2ff20c4b4a399; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 523b84dc7ccea9c4d79126d6ed1cf9033cf83b05	CNA record
Siemens SIMATIC CN 4100 siemens:simatic_cn_4100 (from the name)	before V5.0	CISA ADP
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.5	CISA ADP
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name)	from V3.1.5	CISA ADP
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.5	CISA ADP
linux linux_kernel linux:linux_kernel	from 2.6.12.1 before 6.1.149; from 6.2 before 6.6.103; from 6.7 before 6.12.43; from 6.13 before 6.15.11; from 6.16 before 6.16.2; 2.6.12; 2.6.12; 2.6.12; and 2 more ranges	NVD
debian debian_linux debian:debian_linux	11.0	NVD

References

References

https://git.kernel.org/stable/c/5c3f5a25c62230b7965804ce7a2e9305c3ca3961	patch
https://git.kernel.org/stable/c/cbe740de32bb0fb7a5213731ff5f26ea6718fca3	patch
https://git.kernel.org/stable/c/806f85bdd3a60187c21437fc51baace11f659f35	patch
https://git.kernel.org/stable/c/2828a433c7d7a05b6f27c8148502095101dd0b09	patch
https://git.kernel.org/stable/c/248b2aab9b2af5ecf89d9d7955a2ff20c4b4a399	patch
https://git.kernel.org/stable/c/523b84dc7ccea9c4d79126d6ed1cf9033cf83b05	patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html	third-party-advisory
https://cert-portal.siemens.com/productcert/html/ssa-032379.html
https://cert-portal.siemens.com/productcert/html/ssa-082556.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.