CVE-2022-50272 [Medium] | Security Vulnerability in Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer() Wei Chen reports a kernel bug as blew: general protection fault, probably for non-canonical address KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] ... Call Trace: <TASK> __i2c_transfer+0x77e/0x1930 drivers/i2c/i2c-core-base.c:2109 i2c_transfer+0x1d5/0x3d0 drivers/i2c/i2c-core-base.c:2170 i2cdev_ioctl_rdwr+0x393/0x660 drivers/i2c/i2c-dev.c:297 i2cdev_ioctl+0x75d/0x9f0 drivers/i2c/i2c-dev.c:458 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fd834a8bded In az6027_i2c_xfer(), if msg[i].addr is 0x99, a null-ptr-deref will caused when accessing msg[i].buf. For msg[i].len is 0 and msg[i].buf is null. Fix this by checking msg[i].len in az6027_i2c_xfer().

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-09-16	—	0.03%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2025-09-16

—

0.03%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
5.5	3.1	MEDIUM	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	1.8	3.6	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

5.5

3.1

MEDIUM

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

Attack vector (AV:L): They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

1.8

3.6

[email protected]

OS Trackers for CVE-2022-50272

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2022-50272 not yet assigned priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2022-50272
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2022-50272
`suse`	medium	—	https://www.suse.com/security/cve/CVE-2022-50272/
`ubuntu`	medium	CVE-2022-50272 medium priority: Ubuntu including 158 source packages (linux, linux-allwinner-5.19, …), 1414 status rows across 9 suites (bionic, focal, jammy, noble, plucky, questing, trusty, upstream, xenial): DNE 1017, ignored 159, released 156, not-affected 81, needs-triage 1.	https://ubuntu.com/security/CVE-2022-50272

Affected software / configurations for CVE-2022-50272

Vendor	Product	Version	Raw CPE
linux	linux_kernel	>= 2.6.34, < 4.9.337	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.10, < 4.14.303	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.15, < 4.19.270	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.20, < 5.4.229	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.5, < 5.10.163	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.11, < 5.15.86	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.16, < 6.0.16	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.1, < 6.1.2	cpe:2.3:o:linux:linux_kernel::::::::

References for CVE-2022-50272

URL	Tags
https://git.kernel.org/stable/c/0ed554fd769a19ea8464bb83e9ac201002ef74ad	Patch
https://git.kernel.org/stable/c/210fcf64be4db82c0e190e74b5111e4eef661a7a	Patch
https://git.kernel.org/stable/c/2b6a8a1a32746981044e7ab06649c804acb4068a	Patch
https://git.kernel.org/stable/c/559891d430e3f3a178040c4371ed419edbfa7d65	Patch
https://git.kernel.org/stable/c/6b60cf73a931af34b7a0a3f467a79d9fe0df2d70	Patch
https://git.kernel.org/stable/c/6fbc44731a4665cbe92a5090e9804a388a72214b	Patch
https://git.kernel.org/stable/c/7abfe467cd685f5da7ecb415441e45e3e4e2baa8	Patch
https://git.kernel.org/stable/c/8b256d23361c51aa4b7fdb71176c1ca50966fb39	Patch
https://git.kernel.org/stable/c/c712d1ccbfb787620422b437a5b8fac0802547bd	Patch

URL

CVE-2022-50272 | media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()

Exploit prediction scoring system (EPSS) score for CVE-2022-50272

Common vulnerability scoring system (CVSS) metrics for CVE-2022-50272

Weakness enumeration for CVE-2022-50272

OS Trackers for CVE-2022-50272

Affected software / configurations for CVE-2022-50272

References for CVE-2022-50272