Is CVE-2026-38641 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-38641 being exploited in the wild.

How severe is CVE-2026-38641?

Informational severity, published 26 June 2026.

Which products and versions are affected?

Redox OS Relibc commit 61f42d6b93adc552a9e8b6f207fca907e8ca8be2.

Is there a fix for CVE-2026-38641?

A patch was published on 2026-02-27: Merge request 1046 submitted to fix the issue Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-38641 attacked?

It is attacked with local access, in a software library.

Am I affected by CVE-2026-38641?

Check whether you run Redox OS Relibc 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.

CVE-2026-38641: Redox OS relibc denial of service in DSO::mmap_and_copy

CVE-2026-38641 · Severity: info · Published 2026-06-26

Relibc is a standard C library used by the Redox operating system to handle core system functions, including loading external software modules. A vulnerability exists where the library fails to properly handle malformed files when a program tries to load a shared library. An attacker could use a specially crafted file to cause the application to crash, resulting in a denial of service.

Technologies: Redox OS Relibc. Vendors: Redox OS.

Quick answers

Is CVE-2026-38641 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-38641 being exploited in the wild.
How severe is CVE-2026-38641?: Informational severity, published 26 June 2026.
Which products and versions are affected?: Redox OS Relibc commit 61f42d6b93adc552a9e8b6f207fca907e8ca8be2.
Is there a fix for CVE-2026-38641?: A patch was published on 2026-02-27: Merge request 1046 submitted to fix the issue Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-38641 attacked?: It is attacked with local access, in a software library.
Am I affected by CVE-2026-38641?: Check whether you run Redox OS Relibc 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 reachable unwrap panic exists in the DSO::mmap_and_copy function within src/ld_so/dso.rs of relibc (specifically commit 61f42d). The vulnerability is triggered when the dlopen() function is called on a malformed ELF shared library that does not contain a PT_LOAD segment. Because the code uses .unwrap() on a Result that returns an error in this scenario, the process terminates with a panic. This allows a local attacker to cause a denial of service (DoS) of any process that can be induced to load an arbitrary library file. A fix has been proposed in merge request 1046 to improve error handling.

Affected products

Redox OS relibc commit 61f42d6b93adc552a9e8b6f207fca907e8ca8be2

Timeline

2026-02-27: patched: Merge request 1046 submitted to fix the issue
2026-06-26: disclosed: CVE published

References

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