Under certain conditions, when running the nsDocShell destructor, a race condition can cause a use-after-free.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- Fix
- Fixed in 68.7.0, 74.0.1, 68.6.1
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Mozilla Firefox, Firefox ESR, and Thunderbird are affected. A timing flaw in the browser's document handling can cause the program to access memory it has already freed, which may crash the application or potentially let an attacker run code.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
Under certain conditions, when running the nsDocShell destructor, a race condition can cause a use-after-free. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Thunderbird < 68.7.0, Firefox < 74.0.1, and Firefox ESR < 68.6.1.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- CISA remediation deadline
Due date for US federal agencies to patch
- Record last updated
Affected versions
- Mozilla Thunderbird
From unspecified · fixed in 68.7.0
- Mozilla Firefox
From unspecified · fixed in 74.0.1
- Mozilla Firefox ESR
From unspecified · fixed in 68.6.1