5.3

CVE-2021-20296: debian debian_linux NULL Pointer Dereference

CVSS: 5.3v3.1MediumModified
AliasesUBUNTU-CVE-2021-20296DEBIAN-CVE-2021-20296
Published 01-04-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-20296 is a medium (CVSS 5.3) NULL Pointer Dereference vulnerability in debian debian_linux. EPSS estimates a 1.75% chance of exploitation in the next 30 days, higher than 77.4% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (NVD)
EPSS score
1.75%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 8 · Related 5
DLA-2701-1DLA-3236-1MGASA-2021-0326OPENSUSE-SU-2021:0670-1SUSE-SU-2021:1489-1USN-4996-1

Timeline

  1. 01-04-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

A flaw was found in OpenEXR in versions before 3.0.0-beta. A crafted input file supplied by an attacker, that is processed by the Dwa decompression functionality of OpenEXR's IlmImf library, could cause a NULL pointer dereference. The highest threat from this vulnerability is to system availability.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.75%

Chance of exploitation in the next 30 days

Percentile

77%

Versus all other CVEs

30-day change

0.00 pp

From 1.75% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.75%

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
Openexr1 product
  • openexr< 2.4.3 | ≥ 2.5.0, < 2.5.4
Ubuntu1 product
  • openexr< 2.2.0-10ubuntu2.6+esm1 | < 2.2.0-11.1ubuntu1.7 | < 2.3.0-6ubuntu0.5+esm1

3 vendors · 4 products

References

11 links
Show all 11 references