CVE-2022-49148 - Vulnerability Details

- watch_queue: Free the page array when watch_queue is dismantled

Description

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

watch_queue: Free the page array when watch_queue is dismantled

Commit 7ea1a0124b6d ("watch_queue: Free the alloc bitmap when the
watch_queue is torn down") took care of the bitmap, but not the page
array.

BUG: memory leak
unreferenced object 0xffff88810d9bc140 (size 32):
comm "syz-executor335", pid 3603, jiffies 4294946994 (age 12.840s)
hex dump (first 32 bytes):
40 a7 40 04 00 ea ff ff 00 00 00 00 00 00 00 00 @.@.............
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
kmalloc_array include/linux/slab.h:621 [inline]
kcalloc include/linux/slab.h:652 [inline]
watch_queue_set_size+0x12f/0x2e0 kernel/watch_queue.c:251
pipe_ioctl+0x82/0x140 fs/pipe.c:632
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]

Published: 2025-02-26

Score: 5.5 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`c73be61cede5882f9605a852414db559c0ebedfd`	affected	< 7169f60110915c8b53bffd43741fa020a75eb87a
`c73be61cede5882f9605a852414db559c0ebedfd`	affected	< 4913daecd04addb41bc96a9175a885e1c19862a8
`c73be61cede5882f9605a852414db559c0ebedfd`	affected	< 3963a5d1ff75585bddf0c3a918566a6be09d7520
`c73be61cede5882f9605a852414db559c0ebedfd`	affected	< 375cd2536494cfbcdda84ae8b3e35bf19d0250b9
`c73be61cede5882f9605a852414db559c0ebedfd`	affected	< b490207017ba237d97b735b2aa66dc241ccd18f5

Linux

affected

Version	Status	Constraints
`5.8`	affected	—
`0`	unaffected	< 5.8
`5.10.110`	unaffected	≤ 5.10.*
`5.15.33`	unaffected	≤ 5.15.*
`5.16.19`	unaffected	≤ 5.16.*
`5.17.2`	unaffected	≤ 5.17.*
`5.18`	unaffected	≤ *

Configuration 1 [-]

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

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2022-55077	In the Linux kernel, the following vulnerability has been resolved: watch_queue: Free the page array when watch_queue is dismantled Commit 7ea1a0124b6d ("watch_queue: Free the alloc bitmap when the watch_queue is torn down") took care of the bitmap, but not the page array. BUG: memory leak unreferenced object 0xffff88810d9bc140 (size 32): comm "syz-executor335", pid 3603, jiffies 4294946994 (age 12.840s) hex dump (first 32 bytes): 40 a7 40 04 00 ea ff ff 00 00 00 00 00 00 00 00 @.@............. 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: kmalloc_array include/linux/slab.h:621 [inline] kcalloc include/linux/slab.h:652 [inline] watch_queue_set_size+0x12f/0x2e0 kernel/watch_queue.c:251 pipe_ioctl+0x82/0x140 fs/pipe.c:632 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline]

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00024.

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://git.kernel.org/stable/c/375cd2536494cfbcdda84ae8b3e35bf19d0250b9
https://git.kernel.org/stable/c/3963a5d1ff75585bddf0c3a918566a6be09d7520
https://git.kernel.org/stable/c/4913daecd04addb41bc96a9175a885e1c19862a8
https://git.kernel.org/stable/c/7169f60110915c8b53bffd43741fa020a75eb87a
https://git.kernel.org/stable/c/b490207017ba237d97b735b2aa66dc241ccd18f5
https://lore.kernel.org/linux-cve-announce/2025022608-CVE-2022-49148-88d2@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2022-49148
https://www.cve.org/CVERecord?id=CVE-2022-49148

History

Wed, 01 Oct 2025 20:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Thu, 13 Mar 2025 22:30:00 +0000

Type	Values Removed	Values Added
First Time appeared		Linux Linux linux Kernel
Weaknesses		CWE-401
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel

Thu, 27 Feb 2025 13:30:00 +0000

Type	Values Removed	Values Added
References		https://lore.kernel.org/linux-cve-announce/2025022608-CVE-2022-49148-88d2@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2022-49148 https://www.cve.org/CVERecord?id=CVE-2022-49148
Metrics	threat_severity `None`	cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}` threat_severity `Moderate`

Wed, 26 Feb 2025 02:15:00 +0000

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: watch_queue: Free the page array when watch_queue is dismantled Commit 7ea1a0124b6d ("watch_queue: Free the alloc bitmap when the watch_queue is torn down") took care of the bitmap, but not the page array. BUG: memory leak unreferenced object 0xffff88810d9bc140 (size 32): comm "syz-executor335", pid 3603, jiffies 4294946994 (age 12.840s) hex dump (first 32 bytes): 40 a7 40 04 00 ea ff ff 00 00 00 00 00 00 00 00 @.@............. 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: kmalloc_array include/linux/slab.h:621 [inline] kcalloc include/linux/slab.h:652 [inline] watch_queue_set_size+0x12f/0x2e0 kernel/watch_queue.c:251 pipe_ioctl+0x82/0x140 fs/pipe.c:632 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
Title		watch_queue: Free the page array when watch_queue is dismantled
References		https://git.kernel.org/stable/c/375cd2536494cfbcdda84ae8b3e35bf19d0250b9 https://git.kernel.org/stable/c/3963a5d1ff75585bddf0c3a918566a6be09d7520 https://git.kernel.org/stable/c/4913daecd04addb41bc96a9175a885e1c19862a8 https://git.kernel.org/stable/c/7169f60110915c8b53bffd43741fa020a75eb87a https://git.kernel.org/stable/c/b490207017ba237d97b735b2aa66dc241ccd18f5

Subscriptions

Linux Linux Kernel

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2025-02-26T01:55:15.872Z

Updated: 2026-05-11T18:54:04.084Z

Reserved: 2025-02-26T01:49:39.273Z

Link: CVE-2022-49148

Vulnrichment

Updated: 2025-10-01T16:07:41.819Z

NVD

Status : Modified

Published: 2025-02-26T07:00:51.973

Modified: 2025-10-01T20:15:51.783

Link: CVE-2022-49148

Redhat

Severity : Moderate

Publid Date: 2025-02-26T00:00:00Z

Links: CVE-2022-49148 - Bugzilla

OpenCVE Enrichment

No data.

Weaknesses

CWE-401

Tracking

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

Exploitation none

Automatable no

Technical Impact partial

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