Devolutions.XTS.NET Vulnerable to Timing Attack on GF Multiplications

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

5.1 · CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N · score source

EPSS

• CVE-2024-11862: 0.14% estimated exploitation activity in the next 30 days; percentile 3.45 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Impact Timing attacks on Galois Field multiplications in this package. Successful exploitation would effectively allow a downgrade of the security guarantees of the XTS mode to the security guarantees of ECB mode, allowing block swapping, enabling identification of identical blocks, and rendering half of the XTS key obsolete. Timing attacks require specific conditions to be exploitable. Patches Patched in 2024.11.26 Workarounds Upgrade the package References https://en.wikipedia.org/wiki/Timingattack

Published by the source

27 Nov 2024, 19:01 UTC

Last modified by the source

27 Nov 2024, 22:45 UTC

Source last checked

26 Oct 2026, 17:00 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-j6vm-4r7g-x4gr

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# Patch Next advisory brief: CVE-2024-11862

Advisory: Devolutions.XTS.NET Vulnerable to Timing Attack on GF Multiplications
IDs: CVE-2024-11862, GHSA-j6vm-4r7g-x4gr
Record: https://patchnext.com/advisories/cve-2024-11862 (revision 1, source checked 26 Oct 2026, 17:00 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: devolutions.xts.net 2024.11.26. A vendor fix does not mean a deployment is fixed.

## Affected components
- NuGet devolutions.xts.net: affected < 2024.11.26; fixed in 2024.11.26

## Suggested inspection (read-only)
- NuGet devolutions.xts.net: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on devolutions.xts.net.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-j6vm-4r7g-x4gr (GitHub-reviewed advisory GHSA-j6vm-4r7g-x4gr lists affected ranges: NuGet devolutions.xts.net >=0 <2024.11.26)

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