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CVE-2026-31467

Updated on 22 Apr 2026

Severity

7.5 High severity

Details

CVSS score
7.5
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE ID
Links
NISTCIRCLRHELUbuntu

Overview

About vulnerability

In the Linux kernel, the following vulnerability has been resolved:

erofs: add GFP_NOIO in the bio completion if needed

The bio completion path in the process context (e.g. dm-verity) will directly call into decompression rather than trigger another workqueue context for minimal scheduling latencies, which can then call vm_map_ram() with GFP_KERNEL.

Due to insufficient memory, vm_map_ram() may generate memory swapping I/O, which can cause submit_bio_wait to deadlock in some scenarios.

Trimmed down the call stack, as follows:

f2fs_submit_read_io submit_bio //bio_list is initialized. mmc_blk_mq_recovery z_erofs_endio vm_map_ram __pte_alloc_kernel __alloc_pages_direct_reclaim shrink_folio_list __swap_writepage submit_bio_wait //bio_list is non-NULL, hang!!!

Use memalloc_noio_{save,restore}() to wrap up this path.

Details

Affected product:
AlmaLinux 9.2 ESU , TuxCare 9.6 ESU , Ubuntu 20.04 ELS
Affected packages:
kernel @ 5.14.0 (+3 more)

Fixes

KernelCare state

Live-patch status from KernelCare for each operating system.

Operating system Status Covered kernels
AlmaLinux 10 Released
37 kernels
  • 6.12.0-55.27.1.el10_0
  • 6.12.0-55.28.1.el10_0
  • 6.12.0-55.29.1.el10_0
  • 6.12.0-55.30.1.el10_0
  • 6.12.0-55.31.1.el10_0
  • 6.12.0-55.32.1.el10_0
  • 6.12.0-55.33.1.el10_0
  • 6.12.0-55.34.1.el10_0
  • 6.12.0-55.37.1.el10_0
  • 6.12.0-55.38.1.el10_0
  • 6.12.0-55.39.1.el10_0
  • 6.12.0-55.40.1.el10_0
  • 6.12.0-55.42.1.el10_0
  • 6.12.0-55.43.1.el10_0
  • 6.12.0-124.8.1.el10_1
  • 6.12.0-124.13.1.el10_1
  • 6.12.0-124.16.1.el10_1
  • 6.12.0-124.20.1.el10_1
  • 6.12.0-124.21.1.el10_1
  • 6.12.0-124.27.1.el10_1
  • 6.12.0-124.28.1.el10_1
  • 6.12.0-124.29.1.el10_1
  • 6.12.0-124.31.1.el10_1
  • 6.12.0-124.35.1.el10_1
  • 6.12.0-124.38.1.el10_1
  • 6.12.0-124.39.1.el10_1
  • 6.12.0-124.43.1.el10_1
  • 6.12.0-124.45.1.el10_1
  • 6.12.0-124.47.1.el10_1
  • 6.12.0-124.49.1.el10_1
  • 6.12.0-124.52.1.el10_1
  • 6.12.0-124.55.1.el10_1
  • 6.12.0-124.40.1.el10_1
  • 6.12.0-124.52.2.el10_1
  • 6.12.0-124.52.3.el10_1
  • 6.12.0-124.56.5.el10_1
  • 6.12.0-124.55.3.el10_1
Amazon Linux 2023 Planned —
Debian 12 Released
35 kernels
  • 6.1.38-1
  • 6.1.38-2
  • 6.1.38-4
  • 6.1.52-1
  • 6.1.55-1
  • 6.1.64-1
  • 6.1.66-1
  • 6.1.69-1
  • 6.1.76-1
  • 6.1.27-1
  • 6.1.67-1
  • 6.1.85-1
  • 6.1.90-1
  • 6.1.94-1
  • 6.1.99-1
  • 6.1.106-3
  • 6.1.112-1
  • 6.1.115-1
  • 6.1.119-1
  • 6.1.123-1
  • 6.1.128-1
  • 6.1.124-1
  • 6.1.129-1
  • 6.1.133-1
  • 6.1.135-1
  • 6.1.137-1
  • 6.1.140-1
  • 6.1.139-1
  • 6.1.147-1
  • 6.1.148-1
  • 6.1.153-1
  • 6.1.158-1
  • 6.1.159-1
  • 6.1.162-1
  • 6.1.164-1
Debian 13 Planned —
Oracle Linux 10 Released
35 kernels
  • 6.12.0-55.27.1.0.1.el10_0
  • 6.12.0-55.28.1.0.1.el10_0
  • 6.12.0-55.29.1.0.1.el10_0
  • 6.12.0-55.30.1.0.1.el10_0
  • 6.12.0-55.31.1.0.1.el10_0
  • 6.12.0-55.32.1.0.1.el10_0
  • 6.12.0-55.33.1.0.1.el10_0
  • 6.12.0-55.34.1.0.1.el10_0
  • 6.12.0-55.37.1.0.1.el10_0
  • 6.12.0-55.38.1.0.1.el10_0
  • 6.12.0-55.39.1.0.1.el10_0
  • 6.12.0-55.40.1.0.1.el10_0
  • 6.12.0-55.41.1.0.1.el10_0
  • 6.12.0-55.42.1.0.1.el10_0
  • 6.12.0-55.43.1.0.1.el10_0
  • 6.12.0-124.8.1.el10_1
  • 6.12.0-124.13.1.el10_1
  • 6.12.0-124.16.1.el10_1
  • 6.12.0-124.20.1.el10_1
  • 6.12.0-124.21.1.el10_1
  • 6.12.0-124.27.1.el10_1
  • 6.12.0-124.28.1.el10_1
  • 6.12.0-124.29.1.el10_1
  • 6.12.0-124.31.1.el10_1
  • 6.12.0-124.35.1.el10_1
  • 6.12.0-124.38.1.el10_1
  • 6.12.0-124.39.1.el10_1
  • 6.12.0-124.40.1.el10_1
  • 6.12.0-124.43.1.el10_1
  • 6.12.0-124.45.1.el10_1
  • 6.12.0-124.47.1.el10_1
  • 6.12.0-124.49.1.el10_1
  • 6.12.0-124.52.1.el10_1
  • 6.12.0-124.55.1.el10_1
  • 6.12.0-124.56.1.el10_1
RHEL 10 Released
37 kernels
  • 6.12.0-55.27.1.el10_0
  • 6.12.0-55.28.1.el10_0
  • 6.12.0-55.29.1.el10_0
  • 6.12.0-55.30.1.el10_0
  • 6.12.0-55.31.1.el10_0
  • 6.12.0-55.32.1.el10_0
  • 6.12.0-55.33.1.el10_0
  • 6.12.0-55.34.1.el10_0
  • 6.12.0-55.37.1.el10_0
  • 6.12.0-55.38.1.el10_0
  • 6.12.0-55.39.1.el10_0
  • 6.12.0-55.40.1.el10_0
  • 6.12.0-55.41.1.el10_0
  • 6.12.0-55.42.1.el10_0
  • 6.12.0-55.43.1.el10_0
  • 6.12.0-124.9.1.el10_1
  • 6.12.0-124.8.1.el10_1
  • 6.12.0-124.11.1.el10_1
  • 6.12.0-124.13.1.el10_1
  • 6.12.0-124.16.1.el10_1
  • 6.12.0-124.20.1.el10_1
  • 6.12.0-124.21.1.el10_1
  • 6.12.0-124.27.1.el10_1
  • 6.12.0-124.28.1.el10_1
  • 6.12.0-124.29.1.el10_1
  • 6.12.0-124.31.1.el10_1
  • 6.12.0-124.35.1.el10_1
  • 6.12.0-124.38.1.el10_1
  • 6.12.0-124.39.1.el10_1
  • 6.12.0-124.43.1.el10_1
  • 6.12.0-124.45.1.el10_1
  • 6.12.0-124.47.1.el10_1
  • 6.12.0-124.49.1.el10_1
  • 6.12.0-124.52.1.el10_1
  • 6.12.0-124.55.1.el10_1
  • 6.12.0-124.56.1.el10_1
  • 6.12.0-124.40.1.el10_1
Rocky Linux 10 Released
27 kernels
  • 6.12.0-55.27.1.el10_0
  • 6.12.0-55.29.1.el10_0
  • 6.12.0-55.30.1.el10_0
  • 6.12.0-55.32.1.el10_0
  • 6.12.0-55.34.1.el10_0
  • 6.12.0-55.37.1.el10_0
  • 6.12.0-55.39.1.el10_0
  • 6.12.0-55.40.1.el10_0
  • 6.12.0-55.41.1.el10_0
  • 6.12.0-124.8.1.el10_1
  • 6.12.0-124.13.1.el10_1
  • 6.12.0-124.16.1.el10_1
  • 6.12.0-124.20.1.el10_1
  • 6.12.0-124.21.1.el10_1
  • 6.12.0-124.27.1.el10_1
  • 6.12.0-124.28.1.el10_1
  • 6.12.0-124.29.1.el10_1
  • 6.12.0-124.31.1.el10_1
  • 6.12.0-124.35.1.el10_1
  • 6.12.0-124.38.1.el10_1
  • 6.12.0-124.45.1.el10_1
  • 6.12.0-124.47.1.el10_1
  • 6.12.0-124.49.1.el10_1
  • 6.12.0-124.52.1.el10_1
  • 6.12.0-124.55.1.el10_1
  • 6.12.0-124.56.1.el10_1
  • 6.12.0-124.40.1.el10_1
Ubuntu 22.04 Planned —
Ubuntu 24.04 Planned —