# CVE-2026-21996: dtrace: An unprivileged attacker can reliably trigger a crash of the dtrace process with a malicious ELF binary due to an int...

CVE-2026-21996 is fixed in 3 products on 1 platform, first by ELSA-2026-50249, released April 30, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-21996
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0011
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 30, 2026

## Description

An unprivileged attacker can reliably trigger a crash of the dtrace process with a malicious ELF binary due to an integer Divide-by-Zero in Pbuild_file_symtab()

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | dtrace Debian 14 | 2.0.7-1 | [DEBIAN-CVE-2026-21996](https://patchblox.com/security/data/fix/linux/debian-cve-2026-21996.md) | May 1, 2026 |
| Linux | dtrace ol 10 | 0:2.0.7-4.el9 | [ELSA-2026-50249](https://patchblox.com/security/data/fix/linux/elsa-2026-50249.md) | Apr 30, 2026 |
| Linux | dtrace ol 8 | 0:2.0.7-4.el9 | [ELSA-2026-50250](https://patchblox.com/security/data/fix/linux/elsa-2026-50250.md) | Apr 30, 2026 |
| Linux | dtrace ol 9 | 0:2.0.7-4.el9 | [ELSA-2026-50249](https://patchblox.com/security/data/fix/linux/elsa-2026-50249.md) | Apr 30, 2026 |
| Linux | dtrace-devel ol 10 | 0:2.0.7-4.el9 | [ELSA-2026-50249](https://patchblox.com/security/data/fix/linux/elsa-2026-50249.md) | Apr 30, 2026 |
| Linux | dtrace-devel ol 8 | 0:2.0.7-4.el9 | [ELSA-2026-50250](https://patchblox.com/security/data/fix/linux/elsa-2026-50250.md) | Apr 30, 2026 |
| Linux | dtrace-devel ol 9 | 0:2.0.7-4.el9 | [ELSA-2026-50249](https://patchblox.com/security/data/fix/linux/elsa-2026-50249.md) | Apr 30, 2026 |
| Linux | dtrace-testsuite ol 10 | 0:2.0.7-4.el9 | [ELSA-2026-50249](https://patchblox.com/security/data/fix/linux/elsa-2026-50249.md) | Apr 30, 2026 |
| Linux | dtrace-testsuite ol 8 | 0:2.0.7-4.el9 | [ELSA-2026-50250](https://patchblox.com/security/data/fix/linux/elsa-2026-50250.md) | Apr 30, 2026 |
| Linux | dtrace-testsuite ol 9 | 0:2.0.7-4.el9 | [ELSA-2026-50249](https://patchblox.com/security/data/fix/linux/elsa-2026-50249.md) | Apr 30, 2026 |

---

Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.