9.8

CVE-2018-18512: mozilla thunderbird Use After Free

Modified
AliasesUBUNTU-CVE-2018-18512DEBIAN-CVE-2018-18512
Published 26-04-2019Last modified 05-08-2024

Vulnerability summary

CVE-2018-18512 is a critical (CVSS 9.8) Use After Free vulnerability in mozilla thunderbird. EPSS estimates a 1.58% chance of exploitation in the next 30 days, higher than 75.5% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 9.8 (NVD); no exploitation reported by the 5 checked sources; EPSS 2% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
9.8/10
010
Critical · v3.0 (NVD)
EPSS score
1.58%
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 2
DLA-1678-1DSA-4392-1

Timeline

  1. 26-04-2019
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

A use-after-free vulnerability can occur while playing a sound notification in Thunderbird. The memory storing the sound data is immediately freed, although the sound is still being played asynchronously, leading to a potentially exploitable crash. This vulnerability affects Thunderbird < 60.5.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.58%

Chance of exploitation in the next 30 days

Percentile

76%

Versus all other CVEs

30-day change

No change 0.00 pp

From 1.58% 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: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Debian1 product
  • thunderbird< 1:60.5.0-1
Mozilla1 product
Ubuntu1 product
  • thunderbird< 1:60.6.1+build2-0ubuntu0.16.04.1 | < 1:60.6.1+build2-0ubuntu0.18.04.1

3 vendors · 3 products

References

6 links