Under certain conditions, when handling a ReadableStream, 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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
This vulnerability affects Mozilla Firefox and Thunderbird email software, where a race condition when processing a ReadableStream can lead to memory corruption. Successful exploitation could allow an attacker to crash the application or potentially run malicious code on the affected computer.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
Under certain conditions, when handling a ReadableStream, 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