cbcvebase.
CVE-2022-49256
published 2025-02-26

CVE-2022-49256: In the Linux kernel, the following vulnerability has been resolved: watch_queue: Actually free the watch free_watch() does everything barring actually freeing…

PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.26%
17.2th percentile
In the Linux kernel, the following vulnerability has been resolved: watch_queue: Actually free the watch free_watch() does everything barring actually freeing the watch object. Fix this by adding the missing kfree. kmemleak produces a report something like the following. Note that as an address can be seen in the first word, the watch would appear to have gone through call_rcu(). BUG: memory leak unreferenced object 0xffff88810ce4a200 (size 96): comm "syz-executor352", pid 3605, jiffies 4294947473 (age 13.720s) hex dump (first 32 bytes): e0 82 48 0d 81 88 ff ff 00 00 00 00 00 00 00 00 ..H............. 80 a2 e4 0c 81 88 ff ff 00 00 00 00 00 00 00 00 ................ backtrace: [] kmalloc include/linux/slab.h:581 [inline] [] kzalloc include/linux/slab.h:714 [inline] [] keyctl_watch_key+0xec/0x2e0 security/keys/keyctl.c:1800 [] __do_sys_keyctl+0x3c4/0x490 security/keys/keyctl.c:2016 [] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [] entry_SYSCALL_64_after_hwframe+0x44/0xae

Affected

15 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 5.17.3-1 (bookworm)linux 5.17.3-1 (bookworm)
linuxlinux——
linuxlinux>= c73be61cede5882f9605a852414db559c0ebedfd < 9d92be1a09fbb3dd65600dbfe7eedb40e7228e4b9d92be1a09fbb3dd65600dbfe7eedb40e7228e4b
linuxlinux>= c73be61cede5882f9605a852414db559c0ebedfd < f69aecb49968e14196366bbe896eab0a904229f5f69aecb49968e14196366bbe896eab0a904229f5
linuxlinux>= c73be61cede5882f9605a852414db559c0ebedfd < 7e8c9b0df07a77f0d072603b8ced2677e30e18937e8c9b0df07a77f0d072603b8ced2677e30e1893
linuxlinux>= c73be61cede5882f9605a852414db559c0ebedfd < 31824613a42aacdcbeb325bf07a1c8247a11ebe231824613a42aacdcbeb325bf07a1c8247a11ebe2
linuxlinux>= c73be61cede5882f9605a852414db559c0ebedfd < 3d8dcf278b1ee1eff1e90be848fa2237db4c07a73d8dcf278b1ee1eff1e90be848fa2237db4c07a7
linuxlinux_kernel>= 0 < 5.10.113-15.10.113-1
linuxlinux_kernel>= 0 < 5.17.3-15.17.3-1
linuxlinux_kernel>= 0 < 5.17.3-15.17.3-1
linuxlinux_kernel>= 0 < 5.17.3-15.17.3-1
linuxlinux_kernel>= 5.11 < 5.15.335.15.33
linuxlinux_kernel>= 5.16 < 5.16.195.16.19
linuxlinux_kernel>= 5.17 < 5.17.25.17.2
linuxlinux_kernel>= 5.8 < 5.10.1105.10.110

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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