PatchTheCVECVE-2023-24056: In pkgconf through 1.9.3, variable duplication can cause unbounded string expansion due to incorrect checks in
CVE-2023-24056 is a medium-severity flaw (CVSS 5.5) affecting pkgconf. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
In pkgconf through 1.9.3, variable duplication can cause unbounded string expansion due to incorrect checks in libpkgconf/tuple.c:pkgconf_tuple_parse. For example, a .pc file containing a few hundred bytes can expand to one billion bytes.
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.5 (Medium) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.6% (top 53%) |
| CISA exploited list | No |
| Weakness | CWE-787 |
| Published | 2023-01-22 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2023-24056?
pkgconf: upgrade to newer than 1.9.3. Exact commands for each OS are on this page.
Is CVE-2023-24056 being exploited?
CVE-2023-24056 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2023-24056 affect?
CVE-2023-24056 affects pkgconf. Severity is medium (CVSS 5.5). In pkgconf through 1.9.3, variable duplication can cause unbounded string expansion due to incorrect checks in libpkgconf/tuple.c:pkgconf_tuple_parse. For example, a .pc file containing a few hundred bytes can expand to one billion bytes.
How urgent is CVE-2023-24056?
Priority 36/100. Public exploit reference