CVE-2021-33464
CVE-2021-33464 is a medium-severity vulnerability in Tortall Yasm with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: Medium (CVSS 3.x base score 5.5)
- EPSS exploit prediction: 0% (24th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Tortall Yasm
- Published:
- Last modified:
Description
An issue was discovered in yasm version 1.3.0. There is a heap-buffer-overflow in inc_fopen() in modules/preprocs/nasm/nasm-pp.c.
Frequently asked questions
- What is CVE-2021-33464?
- An issue was discovered in yasm version 1.3.0. There is a heap-buffer-overflow in inc_fopen() in modules/preprocs/nasm/nasm-pp.c.
- How severe is CVE-2021-33464?
- CVE-2021-33464 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2021-33464 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-33464?
- CVE-2021-33464 affects Tortall Yasm. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-33464?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-33464 published?
- CVE-2021-33464 was published on 2022-07-26 and last updated on 2026-06-17.
References
- https://gist.github.com/Clingto/bb632c0c463f4b2c97e4f65f751c5e6d
- https://github.com/yasm/yasm/issues/164
Affected products (1)
- cpe:2.3:a:tortall:yasm:1.3.0:*:*:*:*:*:*:*
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- CVE-2023-31974 — Medium (CVSS 5.5): yasm v1.3.0 was discovered to contain a use after free via the function error at /nasm/nasm-pp.c. Note: Multiple third…
- CVE-2023-31972 — Medium (CVSS 5.5): yasm v1.3.0 was discovered to contain a use after free via the function pp_getline at /nasm/nasm-pp.c. Note: Multiple…
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All CVEs affecting Tortall Yasm →
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