NVD

CVE-2024-36881 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: mm/userfaultfd: reset ptes when close() for wr-protected ones Userfaultfd unregister includes a step to remove wr-protect bits from all the relevant pgtable entries, but that only covered an explicit UFFDIO_UNREGISTER ioctl, not a close() on the userfaultfd itself. Cover that too. This fixes a WARN trace. The only user visible side effect is the user can observe leftover wr-protect bits even if the user close()ed on an userfaultfd when releasing the last reference of it. However hopefully that should be harmless, and nothing bad should happen even if so. This change is now more important after the recent page-table-check patch we merged in mm-unstable (446dd9ad37d0 ("mm/page_table_check: support userfault wr-protect entries")), as we'll do sanity check on uffd-wp bits without vma context. So it's better if we can 100% guarantee no uffd-wp bit leftovers, to make sure each report will be valid.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

ADP: CISA-ADP

Base Score: 5.5 MEDIUM

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

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://git.kernel.org/stable/c/377f3a9a3d032a52325a5b110379a25dd1ab1931	CVE, kernel.org	Patch
https://git.kernel.org/stable/c/8d8b68a5b0c9fb23d37df06bb273ead38fd5a29d	CVE, kernel.org	Patch
https://git.kernel.org/stable/c/c88033efe9a391e72ba6b5df4b01d6e628f4e734	CVE, kernel.org	Patch

Weakness Enumeration

CWE-ID	CWE Name	Source
NVD-CWE-noinfo	Insufficient Information	NIST

Known Affected Software Configurations Switch to CPE 2.2

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Change History

6 change records found show changes

CVE Modified by kernel.org 6/17/2026 3:37:15 AM

Action

Type

Old Value

New Value

Added

Affected

[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["fs/userfaultfd.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"f369b07c861435bd812a9d14493f71b34132ed6f","lessThan":"377f3a9a3d032a52325a5b110379a25dd1ab1931","versionType":"git","status":"affected"},{"version":"f369b07c861435bd812a9d14493f71b34132ed6f","lessThan":"8d8b68a5b0c9fb23d37df06bb273ead38fd5a29d","versionType":"git","status":"affected"},{"version":"f369b07c861435bd812a9d14493f71b34132ed6f","lessThan":"c88033efe9a391e72ba6b5df4b01d6e628f4e734","versionType":"git","status":"affected"},{"version":"3e2747c3ddfa717697c3cc2aa6ab989e48d6587d","versionType":"git","status":"affected"},{"version":"5.19.6","lessThan":"5.20","versionType":"semver","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["fs/userfaultfd.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"6.0","status":"affected"},{"version":"0","lessThan":"6.0","versionType":"semver","status":"unaffected"},{"version":"6.6.31","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.8.10","lessThanOrEqual":"6.8.*","versionType":"semver","status":"unaffected"},{"version":"6.9","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]

Initial Analysis by NIST 4/01/2025 2:34:35 PM

Action	Type	New Value
Added	CWE	NVD-CWE-noinfo
Added	CPE Configuration	OR cpe:2.3:o:linux:linux_kernel:6.9:rc3::::::* cpe:2.3:o:linux:linux_kernel:6.9:rc4::::::* cpe:2.3:o:linux:linux_kernel:6.9:rc1::::::* cpe:2.3:o:linux:linux_kernel:6.9:rc2::::::* cpe:2.3:o:linux:linux_kernel::::::::* versions from (including) 6.7 up to (excluding) 6.8.10 cpe:2.3:o:linux:linux_kernel:6.9:rc5::::::* cpe:2.3:o:linux:linux_kernel::::::::* versions from (including) 5.19.6 up to (excluding) 6.6.31 cpe:2.3:o:linux:linux_kernel:6.9:rc6::::::* cpe:2.3:o:linux:linux_kernel:6.9:rc7::::::*
Added	Reference Type	CVE: https://git.kernel.org/stable/c/377f3a9a3d032a52325a5b110379a25dd1ab1931 Types: Patch
Added	Reference Type	CVE: https://git.kernel.org/stable/c/8d8b68a5b0c9fb23d37df06bb273ead38fd5a29d Types: Patch
Added	Reference Type	CVE: https://git.kernel.org/stable/c/c88033efe9a391e72ba6b5df4b01d6e628f4e734 Types: Patch
Added	Reference Type	kernel.org: https://git.kernel.org/stable/c/377f3a9a3d032a52325a5b110379a25dd1ab1931 Types: Patch
Added	Reference Type	kernel.org: https://git.kernel.org/stable/c/8d8b68a5b0c9fb23d37df06bb273ead38fd5a29d Types: Patch
Added	Reference Type	kernel.org: https://git.kernel.org/stable/c/c88033efe9a391e72ba6b5df4b01d6e628f4e734 Types: Patch

New CVE Received from kernel.org 5/30/2024 12:15:11 PM

Action	Type	New Value
Added	Description	In the Linux kernel, the following vulnerability has been resolved: mm/userfaultfd: reset ptes when close() for wr-protected ones Userfaultfd unregister includes a step to remove wr-protect bits from all the relevant pgtable entries, but that only covered an explicit UFFDIO_UNREGISTER ioctl, not a close() on the userfaultfd itself. Cover that too. This fixes a WARN trace. The only user visible side effect is the user can observe leftover wr-protect bits even if the user close()ed on an userfaultfd when releasing the last reference of it. However hopefully that should be harmless, and nothing bad should happen even if so. This change is now more important after the recent page-table-check patch we merged in mm-unstable (446dd9ad37d0 ("mm/page_table_check: support userfault wr-protect entries")), as we'll do sanity check on uffd-wp bits without vma context. So it's better if we can 100% guarantee no uffd-wp bit leftovers, to make sure each report will be valid.
Added	Reference	kernel.org https://git.kernel.org/stable/c/377f3a9a3d032a52325a5b110379a25dd1ab1931 [No types assigned]
Added	Reference	kernel.org https://git.kernel.org/stable/c/8d8b68a5b0c9fb23d37df06bb273ead38fd5a29d [No types assigned]
Added	Reference	kernel.org https://git.kernel.org/stable/c/c88033efe9a391e72ba6b5df4b01d6e628f4e734 [No types assigned]

Quick Info

CVE Dictionary Entry:
CVE-2024-36881
NVD Published Date:
05/30/2024
NVD Last Modified:
06/17/2026
Source:
kernel.org

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2024-36881 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Change History

CVE Modified by CISA-ADP 6/17/2026 3:37:15 AM

CVE Modified by kernel.org 6/17/2026 3:37:15 AM

Initial Analysis by NIST 4/01/2025 2:34:35 PM

CVE Modified by CVE 11/21/2024 4:22:43 AM

CVE Modified by CISA-ADP 11/06/2024 5:35:07 PM

New CVE Received from kernel.org 5/30/2024 12:15:11 PM

Quick Info