# CVE-2026-102010: GCC libstdc++ use-after-free in priority queue erase_if

Source: https://junglewise.ai/threats/cve-2026-102010-a-flaw-was-found-in-gcc-when-an-application-calls-the-erase-if  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-28. Updated: 2026-09-28  
License: CC BY 4.0 with a link back

CVE-2026-102010 · Severity: high · CVSS 7 · Published 2026-09-28

GCC's standard C++ library (libstdc++) contains a flaw in its priority queue implementation that can be triggered by calling the erase_if function. When exploited, this causes the application to crash or potentially corrupt memory, resulting in denial of service. Applications using C++ with binary heap priority queues are at risk if they rely on this library function.

Vendors: [Gnu](https://junglewise.ai/threats/vendors/gnu).

## Quick answers

**Is CVE-2026-102010 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-102010 being exploited in the wild.

**How severe is CVE-2026-102010?** High severity, with a CVSS score of 7, published 28 September 2026.

**Which products and versions are affected?** Gnu GCC 15, 16.

**Is there a fix for CVE-2026-102010?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-102010 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-102010?** Check whether you run Gnu GCC at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A use-after-free vulnerability exists in libstdc++'s binary heap priority queue implementation when the erase_if function is called. The library reallocates storage but fails to update the internal entry pointer, leaving stale references to freed memory. An attacker who can trigger the erase_if operation on a priority queue can cause application crashes or memory corruption.

## Affected products

- GNU GCC 15, 16

## Timeline

- 2026-09-28: disclosed

## References

- [https://access.redhat.com/downloads/content/package-browser/](https://access.redhat.com/downloads/content/package-browser/)
- [https://access.redhat.com/security/cve/CVE-2026-102010](https://access.redhat.com/security/cve/CVE-2026-102010)

## Related threats

- [GCC libstdc++ out-of-bounds memory access in parallel search](https://junglewise.ai/threats/cve-2026-114690-a-flaw-was-found-in-gcc-an-out-of-bounds-memory-access)