---
id: CVE-2022-50159
title: 'of: check previous kernel''s ima-kexec-buffer against memory bounds'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  of: check previous kernel's ima-kexec-buffer against memory bounds

  Presently ima_get_kexec_buffer() doesn't check if the previous kernel's
  ima-kexec-buffer lies outsid…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 467d27824920e866af148132f555d40ca1fb199e <
    beb5bba5dd132650c073f815c685c60c3e5b783b
  - >-
    Linux >= 467d27824920e866af148132f555d40ca1fb199e <
    dc3b8525f83ac6bbc885bb24bbb8a76f4622200e
  - >-
    Linux >= 467d27824920e866af148132f555d40ca1fb199e <
    1b2263d6c86fca8f30e18231778393bfc287bb27
  - >-
    Linux >= 467d27824920e866af148132f555d40ca1fb199e <
    cbf9c4b9617b6767886a913705ca14b7600c77db
  - Linux 4.10
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T19:55:21.572245Z'
published: '2025-06-18'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T20:00:19.027Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2022-50159'
references:
  - url: 'https://git.kernel.org/stable/c/beb5bba5dd132650c073f815c685c60c3e5b783b'
  - url: 'https://git.kernel.org/stable/c/dc3b8525f83ac6bbc885bb24bbb8a76f4622200e'
  - url: 'https://git.kernel.org/stable/c/1b2263d6c86fca8f30e18231778393bfc287bb27'
  - url: 'https://git.kernel.org/stable/c/cbf9c4b9617b6767886a913705ca14b7600c77db'
tags:
  - cve.org
epss: 0.00193
epssPercentile: 0.0904
ingestedAt: '2026-11-05T22:38:31.689Z'
---

## Overview

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

of: check previous kernel's ima-kexec-buffer against memory bounds

Presently ima_get_kexec_buffer() doesn't check if the previous kernel's
ima-kexec-buffer lies outside the addressable memory range. This can result
in a kernel panic if the new kernel is booted with 'mem=X' arg and the
ima-kexec-buffer was allocated beyond that range by the previous kernel.
The panic is usually of the form below:

$ sudo kexec --initrd initrd vmlinux --append='mem=16G'

<snip>
 BUG: Unable to handle kernel data access on read at 0xc000c01fff7f0000
 Faulting instruction address: 0xc000000000837974
 Oops: Kernel access of bad area, sig: 11 [#1]
<snip>
 NIP [c000000000837974] ima_restore_measurement_list+0x94/0x6c0
 LR [c00000000083b55c] ima_load_kexec_buffer+0xac/0x160
 Call Trace:
 [c00000000371fa80] [c00000000083b55c] ima_load_kexec_buffer+0xac/0x160
 [c00000000371fb00] [c0000000020512c4] ima_init+0x80/0x108
 [c00000000371fb70] [c0000000020514dc] init_ima+0x4c/0x120
 [c00000000371fbf0] [c000000000012240] do_one_initcall+0x60/0x2c0
 [c00000000371fcc0] [c000000002004ad0] kernel_init_freeable+0x344/0x3ec
 [c00000000371fda0] [c0000000000128a4] kernel_init+0x34/0x1b0
 [c00000000371fe10] [c00000000000ce64] ret_from_kernel_thread+0x5c/0x64
 Instruction dump:
 f92100b8 f92100c0 90e10090 910100a0 4182050c 282a0017 3bc00000 40810330
 7c0802a6 fb610198 7c9b2378 f80101d0 <a1240000> 2c090001 40820614 e9240010
 ---[ end trace 0000000000000000 ]---

Fix this issue by checking returned PFN range of previous kernel's
ima-kexec-buffer with page_is_ram() to ensure correct memory bounds.

## Affected

- `Linux >= 467d27824920e866af148132f555d40ca1fb199e < beb5bba5dd132650c073f815c685c60c3e5b783b`
- `Linux >= 467d27824920e866af148132f555d40ca1fb199e < dc3b8525f83ac6bbc885bb24bbb8a76f4622200e`
- `Linux >= 467d27824920e866af148132f555d40ca1fb199e < 1b2263d6c86fca8f30e18231778393bfc287bb27`
- `Linux >= 467d27824920e866af148132f555d40ca1fb199e < cbf9c4b9617b6767886a913705ca14b7600c77db`
- `Linux 4.10`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.