7.8

CVE-2021-30500: fedoraproject fedora NULL Pointer Dereference

CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2021-30500DEBIAN-CVE-2021-30500
Published 26-05-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-30500 is a high (CVSS 7.8) NULL Pointer Dereference vulnerability in fedoraproject fedora. EPSS estimates a 1.23% chance of exploitation in the next 30 days, higher than 68.6% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
41/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
1.23%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2023:0088-1

Timeline

  1. 26-05-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

Null pointer dereference was found in upx PackLinuxElf::canUnpack() in p_lx_elf.cpp,in version UPX 4.0.0. That allow attackers to execute arbitrary code and cause a denial of service via a crafted file.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.23%

Chance of exploitation in the next 30 days

Percentile

69%

Versus all other CVEs

30-day change

0.00 pp

From 1.23% on 21-09-2026

21-09-202621-10-2026
EPSS score
1.23%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Upx

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • upx-ucl< 4.2.2-1
Fedoraproject1 product
Redhat1 product
Ubuntu1 product
  • upx-uclAll versions (No fix recorded)
Upx1 product

5 vendors · 5 products

References

6 links