CVE-2022-50092
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-50092
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50092.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2022-50092
- Related
- Published
- 2025-06-18T11:15:38Z
- Modified
- 2025-06-18T16:48:15.776323Z
- Downstream
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
dm thin: fix use-after-free crash in dmsmregisterthresholdcallback
Fault inject on pool metadata device reports: BUG: KASAN: use-after-free in dmpoolregistermetadatathreshold+0x40/0x80 Read of size 8 at addr ffff8881b9d50068 by task dmsetup/950
CPU: 7 PID: 950 Comm: dmsetup Tainted: G W 5.19.0-rc6 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1.fc33 04/01/2014 Call Trace: <TASK> dumpstacklvl+0x34/0x44 printaddressdescription.constprop.0.cold+0xeb/0x3f4 kasanreport.cold+0xe6/0x147 dmpoolregistermetadatathreshold+0x40/0x80 poolctr+0xa0a/0x1150 dmtableaddtarget+0x2c8/0x640 tableload+0x1fd/0x430 ctlioctl+0x2c4/0x5a0 dmctlioctl+0xa/0x10 _x64sysioctl+0xb3/0xd0 dosyscall64+0x35/0x80 entrySYSCALL64afterhwframe+0x46/0xb0
This can be easily reproduced using: echo offline > /sys/block/sda/device/state dd if=/dev/zero of=/dev/mapper/thin bs=4k count=10 dmsetup load pool --table "0 20971520 thin-pool /dev/sda /dev/sdb 128 0 0"
If a metadata commit fails, the transaction will be aborted and the metadata space maps will be destroyed. If a DM table reload then happens for this failed thin-pool, a use-after-free will occur in dmsmregisterthresholdcallback (called from dmpoolregistermetadatathreshold).
Fix this by in dmpoolregistermetadatathreshold() by returning the -EINVAL error if the thin-pool is in fail mode. Also fail pool_ctr() with a new error message: "Error registering metadata threshold".
- References
-
- https://git.kernel.org/stable/c/05cef0999b3208b5a6ede1bfac855139e4de55ef
- https://git.kernel.org/stable/c/1a199fa9217d28511ff88529238fd9980ea64cf3
- https://git.kernel.org/stable/c/3534e5a5ed2997ca1b00f44a0378a075bd05e8a3
- https://git.kernel.org/stable/c/5e2cf705155a1514be3c96ea664a9cd356998ee7
- https://git.kernel.org/stable/c/e4dbe24f4bfd8377e7ba79fdcdb7c4d6eb1c6790
- https://git.kernel.org/stable/c/f83131a3071a0b61a4d7dca70f95adb3ffad920e
- https://security-tracker.debian.org/tracker/CVE-2022-50092
Affected packages
Debian:11 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed5.10.140-1
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source