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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2022-50159
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-06-18 11:15:46 UTC
Updated2026-11-05 20:17:25 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 467d27824920e866af148132f555d40ca1fb199e beb5bba5dd132650c073f815c685c60c3e5b783b git Not specified
CNA Linux Linux affected 467d27824920e866af148132f555d40ca1fb199e dc3b8525f83ac6bbc885bb24bbb8a76f4622200e git Not specified
CNA Linux Linux affected 467d27824920e866af148132f555d40ca1fb199e 1b2263d6c86fca8f30e18231778393bfc287bb27 git Not specified
CNA Linux Linux affected 467d27824920e866af148132f555d40ca1fb199e cbf9c4b9617b6767886a913705ca14b7600c77db git Not specified
CNA Linux Linux affected 4.10 Not specified
CNA Linux Linux unaffected 4.10 semver Not specified
CNA Linux Linux unaffected 5.15.61 5.15.* semver Not specified
CNA Linux Linux unaffected 5.18.18 5.18.* semver Not specified
CNA Linux Linux unaffected 5.19.2 5.19.* semver Not specified
CNA Linux Linux unaffected 6.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/1b2263d6c86fca8f30e18231778393bfc287bb27 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/dc3b8525f83ac6bbc885bb24bbb8a76f4622200e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/beb5bba5dd132650c073f815c685c60c3e5b783b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/cbf9c4b9617b6767886a913705ca14b7600c77db 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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