CVE-2023-31975 json
yasm v1.3.0 was discovered to contain a memory leak via the function yasm_intnum_copy at /libyasm/intnum.c.
published 2023-05-09 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-36264
- cvss
- 3.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 40%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- yasm CBL-Mariner 2.0, Azure Linux 3.0 1.3.0-14
azure linux advisories AZL-26632AZL-35383
Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2023-31975 updated cvss 3.3
yasm: memory leak in yasm_intnum_copy() in libyasm/intnum.c
-
Red Hat All currently supported Red Hat productsnot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 21 mo ago
Exploit prediction
0.47% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/yasm/yasm/issues/210 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 3.3 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L |
| NVD | 3.1 | 3.3 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L |
| CNA | 3.1 | 3.3 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L |
Classification
- Weakness
-
- CWE-401 Missing Release of Memory after Effective Lifetime
References
-
github.com
/yasm/yasm/issues/210
exploit, issue-tracking
-
openwall.com
/lists/oss-security/2023/06/20/6
mailing-list, third-party-advisory
-
openwall.com
/lists/oss-security/2023/06/21/2
mailing-list, third-party-advisory
-
openwall.com
/lists/oss-security/2023/06/21/7
mailing-list, third-party-advisory
-
openwall.com
/lists/oss-security/2023/06/21/10
mailing-list, third-party-advisory
-
openwall.com
/lists/oss-security/2023/06/21/5
mailing-list, third-party-advisory
-
openwall.com
/lists/oss-security/2023/06/21/8
mailing-list, third-party-advisory
-
openwall.com
/lists/oss-security/2023/06/21/9
mailing-list, third-party-advisory
-
openwall.com
/lists/oss-security/2023/06/21/13
mailing-list, third-party-advisory
-
openwall.com
/lists/oss-security/2023/06/22/1
mailing-list, third-party-advisory
-
openwall.com
/lists/oss-security/2023/06/22/3
mailing-list, third-party-advisory
-
openwall.com
/lists/oss-security/2023/06/22/6
mailing-list, third-party-advisory
-
openwall.com
/lists/oss-security/2023/06/23/2
mailing-list, third-party-advisory
-
openwall.com
/lists/oss-security/2023/06/23/1
mailing-list, third-party-advisory
-
openwall.com
/lists/oss-security/2023/06/23/4
mailing-list, third-party-advisory
-
openwall.com
/lists/oss-security/2023/06/23/8
mailing-list, third-party-advisory
-
openwall.com
/lists/oss-security/2023/06/23/9
mailing-list, third-party-advisory
-
openwall.com
/lists/oss-security/2023/06/24/1
mailing-list, third-party-advisory
Sources
- CVE List CVE-2023-31975
- NVD CVE-2023-31975
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.