CVE-2023-31975 — yasm v1

yasm v1.3.0 was discovered to contain a memory leak via the function yasm_intnum_copy at /libyasm/intnum.c. Note: Multiple third parties dispute this as a bug and not a vulnerability according to the YASM security policy.

01What is this vulnerability?

yasm v1.3.0 was discovered to contain a memory leak via the function yasm_intnum_copy at /libyasm/intnum.c. Note: Multiple third parties dispute this as a bug and not a vulnerability according to the YASM security policy.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-05-09T00:00:00.000Z
• Last modified: 2025-01-29T18:28:03.588Z

09References

• github.com — https://github.com/yasm/yasm/issues/210
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/06/20/6
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/06/21/2
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/06/21/7
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/06/21/10
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/06/21/5
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/06/21/8
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/06/21/9
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/06/21/13
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/06/22/1
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/06/22/3
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/06/22/6
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/06/23/2
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/06/23/1
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/06/23/4
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/06/23/8
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/06/23/9
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/06/24/1