Is CVE-2026-48982 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-48982 being exploited in the wild.

How severe is CVE-2026-48982?

Medium severity, with a CVSS score of 5.8, published 18 June 2026.

Is there a fix for CVE-2026-48982?

A patch was published on 2026-05-23: Version 0.9.2 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-48982 attacked?

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

Am I affected by CVE-2026-48982?

Check whether you run Mcdope Pam Usb 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-2026-48982: mcdope pam_usb race condition in one-time pad update

CVE-2026-48982 · Severity: medium · CVSS 5.8 · Published 2026-06-18

pam_usb is a tool that allows users to log into Linux systems using a standard USB flash drive as a security key. A flaw in how it handles security data could allow two simultaneous login attempts to interfere with each other, potentially causing login failures or allowing an attacker to bypass security protections that prevent the reuse of old authentication data. This could lead to unauthorized access if an attacker can precisely time their actions during a login event.

Technologies: Mcdope Pam Usb. Vendors: Mcdope.

Quick answers

Is CVE-2026-48982 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-48982 being exploited in the wild.
How severe is CVE-2026-48982?: Medium severity, with a CVSS score of 5.8, published 18 June 2026.
Which products and versions are affected?: Mcdope Pam Usb < 0.9.2.
Is there a fix for CVE-2026-48982?: A patch was published on 2026-05-23: Version 0.9.2 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-48982 attacked?: It is attacked with local access, in a software library.
Am I affected by CVE-2026-48982?: Check whether you run Mcdope Pam Usb 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 race condition (CWE-362) exists in pam_usb's one-time pad (OTP) update mechanism within `src/pad.c`. When updating the OTP file, the application creates a temporary file using `open()` without the `O_EXCL` flag, making the operation non-atomic. If two concurrent processes attempt to update the same pad, they may both succeed in opening the file, leading to one write silently overwriting the other. Because the OTP is the primary mechanism for replay prevention, a successful race can cause the stored pad to diverge from expected values, resulting in authentication failures or a window for pad reuse. This requires local access and high timing precision to exploit. The issue is fixed in version 0.9.2 by adding `O_EXCL` to the file creation flags.

Affected products

mcdope pam_usb < 0.9.2

Timeline

2026-05-23: patched: Version 0.9.2 released
2026-05-24: advisory: GitHub Security Advisory published
2026-06-18: disclosed: CVE-2026-48982 published to NVD

References

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