9.8

CVE-2020-24978: nasm netwide_assembler Double Free

CVSS: 9.8v3.1CriticalModified
AliasesUBUNTU-CVE-2020-24978DEBIAN-CVE-2020-24978
Published 03-09-2020Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-24978 is a critical (CVSS 9.8) Double Free vulnerability in nasm netwide_assembler. EPSS estimates a 1.36% chance of exploitation in the next 30 days, higher than 71.3% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
1.36%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 03-09-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

In NASM 2.15.04rc3, there is a double-free vulnerability in pp_tokline asm/preproc.c. This is fixed in commit 8806c3ca007b84accac21dd88b900fb03614ceb7.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.36%

Chance of exploitation in the next 30 days

Percentile

71%

Versus all other CVEs

30-day change

0.00 pp

From 1.36% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.36%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (bugzilla.nasm.us)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • nasm< 2.15.04-1
Nasm1 product
Ubuntu1 product
  • nasmAll versions (No fix recorded)

3 vendors · 3 products

References

4 links