CVE-2022-49148

watch_queue: Free the page array when watch_queue is dismantled

MEDIUM

5.5

CVSS Score

Published: February 26, 2025 at 01:55 AM UTC

Updated: June 17, 2026 at 05:17 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

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]

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

5.11 ≤ v < 5.15.335.16 ≤ v < 5.16.195.17 ≤ v < 5.17.25.8 ≤ v < 5.10.1105.8 ≤ v < 5.15.335.8 ≤ v < 5.16.195.8 ≤ v < 5.17.25.8 ≤ v < 5.185.8c73be61cede5882f9605a852414db559c0ebedfd

Vendor states this is fixed in 375cd2536494cfbcdda84ae8b3e35bf19d0250b9 (fixed)

Vendor states this is fixed in 3963a5d1ff75585bddf0c3a918566a6be09d7520 (fixed)

Vendor states this is fixed in 4913daecd04addb41bc96a9175a885e1c19862a8 (fixed)

Vendor states this is fixed in 7169f60110915c8b53bffd43741fa020a75eb87a (fixed)

Vendor states this is fixed in b490207017ba237d97b735b2aa66dc241ccd18f5 (fixed)

Vendor states this is fixed in 5.10.110 (unaffected)

Vendor states this is fixed in 5.15.33 (unaffected)

Vendor states this is fixed in 5.16.19 (unaffected)

Vendor states this is fixed in 5.17.2 (unaffected)

Vendor states this is fixed in 5.18 (unaffected)

Vendor states this is fixed in 5.8 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references