byacc vulnerabilities and fixes

Recent CVEs affecting byacc, with upgrade or downgrade steps. 2 tracked.

byacc has 2 tracked vulnerabilities, 0 critical. A fixed release or vendor patch exists for 2. Most recent: 2023-01-20. Highest priority: CVE-2021-33641 (score 32/100).

• CVE-2021-33642 MEDIUM 5.5 UPGRADE When a file is processed, an infinite loop occurs in next_inline() of the more_curly() function.
• CVE-2021-33641 HIGH 7.8 UPGRADE When processing files, malloc stores the data of the current line

FAQ

How do I fix byacc vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is byacc being exploited right now?

None of the tracked byacc CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.

Which byacc CVE should I patch first?

CVE-2021-33641 currently ranks highest (32/100): When processing files, malloc stores the data of the current line.

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