7.5

CVE-2026-1940: debian debian_linux Out-of-bounds Read

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-1940DEBIAN-CVE-2026-1940
Published 23-03-2026Last modified 24-03-2026
Open JSON

Vulnerability summary

CVE-2026-1940 is a high (CVSS 7.5) Out-of-bounds Read vulnerability in debian debian_linux. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 13.3% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.23%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1
MGASA-2026-0222

Timeline

  1. 23-03-2026
    PublishedVulnerability first disclosed.
  2. 24-03-2026
    Last modifiedVulnerability information updated.

Description

An incomplete fix for CVE-2024-47778 allows an out-of-bounds read in gst_wavparse_adtl_chunk() function. The patch added a size validation check lsize + 8 > size, but it does not account for the GST_ROUND_UP_2(lsize) used in the actual offset calculation. When lsize is an odd number, the parser advances more bytes than validated, causing OOB read.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.23%

Chance of exploitation in the next 30 days

Percentile

13%

Versus all other CVEs

30-day change

+0.01 pp

From 0.22% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.23%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian2 products
  • gst-plugins-good1.0All versions (No fix recorded) | < 1.22.0-5+deb12u4 | < 1.26.2-1+deb13u2 | < 1.28.1-1
  • debian_linuxEOL11.0 | 12.0
Freedesktop1 product
Gstreamer1 product
Redhat1 product
Ubuntu1 product
  • gst-plugins-bad1.0All versions (No fix recorded)

5 vendors · 6 products

References

7 links