CVE-2024-41021

In the Linux kernel, the following vulnerability has been resolved: s390/mm: Fix VM_FAULT_HWPOISON handling in do_exception() There is no support for HWPOISON, MEMORY_FAILURE, or ARCH_HAS_COPY_MC on s390. Therefore we do not expect to see VM_FAULT_HWPOISON in do_exception(). However, since commit af19487f00f3 ("mm: make PTE_MARKER_SWAPIN_ERROR more general"), it is possible to see VM_FAULT_HWPOISON in combination with PTE_MARKER_POISONED, even on architectures that do not support HWPOISON otherwise. In this case, we will end up on the BUG() in do_exception(). Fix this by treating VM_FAULT_HWPOISON the same as VM_FAULT_SIGBUS, similar to x86 when MEMORY_FAILURE is not configured. Also print unexpected fault flags, for easier debugging. Note that VM_FAULT_HWPOISON_LARGE is not expected, because s390 cannot support swap entries on other levels than PTE level.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/73a9260b7366d2906ec011e100319359fe2277d0	Patch
https://git.kernel.org/stable/c/9e13767ccefdc4f8aa92514b592b60f6b54882ff	Patch
https://git.kernel.org/stable/c/a3aefb871222a9880602d1a44a558177b4143e3b	Patch
https://git.kernel.org/stable/c/df39038cd89525d465c2c8827eb64116873f141a	Patch
https://git.kernel.org/stable/c/9e13767ccefdc4f8aa92514b592b60f6b54882ff	Patch
https://git.kernel.org/stable/c/a3aefb871222a9880602d1a44a558177b4143e3b	Patch
https://git.kernel.org/stable/c/df39038cd89525d465c2c8827eb64116873f141a	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2024-07-29 14:15

Updated : 2025-09-25 20:05

NVD link : CVE-2024-41021

Mitre link : CVE-2024-41021

CVE.ORG link : CVE-2024-41021

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-401

Missing Release of Memory after Effective Lifetime

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