CVE-2025-39822 Affecting linux-qemu-6.12 package, versions <6.12.80-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.13% (3rd percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-LINUXQEMU612-15992448
  • published12 Apr 2026
  • disclosed16 Sept 2025

Introduced: 16 Sep 2025

CVE-2025-39822  (opens in a new tab)

How to fix?

Upgrade Chainguard linux-qemu-6.12 to version 6.12.80-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-qemu-6.12 package and not the linux-qemu-6.12 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:

io_uring/kbuf: fix signedness in this_len calculation

When importing and using buffers, buf->len is considered unsigned. However, buf->len is converted to signed int when committing. This can lead to unexpected behavior if the buffer is large enough to be interpreted as a negative value. Make min_t calculation unsigned.

CVSS Base Scores

version 3.1