CVE-2026-43391 Affecting linux-qemu-melange package, versions <6.18.49-r2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CHAINGUARDLATEST-LINUXQEMUMELANGE-19667594
- published10 Sept 2026
- disclosed8 May 2026
Introduced: 8 May 2026
CVE-2026-43391 (opens in a new tab)How to fix?
Upgrade Chainguard linux-qemu-melange to version 6.18.49-r2 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream linux-qemu-melange package and not the linux-qemu-melange package as distributed by Chainguard.
See How to fix? for Chainguard relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
nsfs: tighten permission checks for handle opening
Even privileged services should not necessarily be able to see other privileged service's namespaces so they can't leak information to each other. Use may_see_all_namespaces() helper that centralizes this policy until the nstree adapts.