Out-of-bounds Read Affecting linux-qemu-melange package, versions <6.18.49-r2


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.15% (5th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-LINUXQEMUMELANGE-19667615
  • published10 Sept 2026
  • disclosed27 May 2026

Introduced: 27 May 2026

CVE-2025-71306  (opens in a new tab)
CWE-125  (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:

ima: Fix stack-out-of-bounds in is_bprm_creds_for_exec()

KASAN reported a stack-out-of-bounds access in ima_appraise_measurement from is_bprm_creds_for_exec:

BUG: KASAN: stack-out-of-bounds in ima_appraise_measurement+0x12dc/0x16a0 Read of size 1 at addr ffffc9000160f940 by task sudo/550 The buggy address belongs to stack of task sudo/550 and is located at offset 24 in frame: ima_appraise_measurement+0x0/0x16a0 This frame has 2 objects: [48, 56) 'file' [80, 148) 'hash'

This is caused by using container_of on the *file pointer. This offset calculation is what triggers the stack-out-of-bounds error.

In order to fix this, pass in a bprm_is_check boolean which can be set depending on how process_measurement is called. If the caller has a linux_binprm pointer and the function is BPRM_CHECK we can determine is_check and set it then. Otherwise set it to false.

CVSS Base Scores

version 3.1