7.8

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

Modified
AliasesUBUNTU-CVE-2025-38702DEBIAN-CVE-2025-38702
Published 04-09-2025Last modified 15-10-2026

Vulnerability summary

CVE-2025-38702 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in debian debian_linux. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.8% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
0.19%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 36 · Related 32
DLA-4328-1DSA-6009-1MGASA-2025-0234MGASA-2025-0235OPENSUSE-SU-2025:20081-1SUSE-SU-2025:03600-1

Timeline

  1. 04-09-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.19% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu149 products
  • linuxAll versions (No fix recorded) | < 6.8.0-100.100
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1046.49
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.153-1 | < 6.12.43-1 | < 6.16.3-1
  • debian_linuxEOL11.0
Linux2 products
  • linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 5c3f5a25c62230b7965804ce7a2e9305c3ca3961 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < cbe740de32bb0fb7a5213731ff5f26ea6718fca3 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 806f85bdd3a60187c21437fc51baace11f659f35 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 2828a433c7d7a05b6f27c8148502095101dd0b09 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 248b2aab9b2af5ecf89d9d7955a2ff20c4b4a399 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 523b84dc7ccea9c4d79126d6ed1cf9033cf83b05 | 2.6.12
  • linux_kernel≥ 2.6.12.1, < 6.1.149 | ≥ 6.2, < 6.6.103 | ≥ 6.7, < 6.12.43 | ≥ 6.13, < 6.15.11 | ≥ 6.16, < 6.16.2 | 2.6.12 | 2.6.12:rc2 | 2.6.12:rc3 | 2.6.12:rc4 | 2.6.12:rc5

3 vendors · 153 products

References

30 links
Show all 30 references