CVE-2022-50272

media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()

MEDIUM

5.5

CVSS Score

Published: September 15, 2025 at 02:21 PM UTC

Updated: June 17, 2026 at 05:23 AM UTC

1 product affected across 1 vendorLinux Kernel

Using Linux by Linux?

Get instant alerts when new vulnerabilities affect Linux - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

MEDIUM5.5

Exploit prediction

EPSS 0.2%

Description

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().

Affected

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

Linux Kernel · Linux

95%

2.6.34 ≤ v < 4.14.3032.6.34 ≤ v < 4.19.2702.6.34 ≤ v < 4.9.3372.6.34 ≤ v < 5.10.1632.6.34 ≤ v < 5.15.862.6.34 ≤ v < 5.4.2292.6.34 ≤ v < 6.0.162.6.34 ≤ v < 6.1.22.6.34 ≤ v < 6.24.10 ≤ v < 4.14.3034.15 ≤ v < 4.19.2704.20 ≤ v < 5.4.2295.11 ≤ v < 5.15.865.16 ≤ v < 6.0.165.5 ≤ v < 5.10.1636.1 ≤ v < 6.1.22.6.3476f9a820c8672ada12ffa0903652c9e6f2429462

Vendor states this is fixed in 0ed554fd769a19ea8464bb83e9ac201002ef74ad (fixed)

Vendor states this is fixed in 210fcf64be4db82c0e190e74b5111e4eef661a7a (fixed)

Vendor states this is fixed in 2b6a8a1a32746981044e7ab06649c804acb4068a (fixed)

Vendor states this is fixed in 559891d430e3f3a178040c4371ed419edbfa7d65 (fixed)

Vendor states this is fixed in 6b60cf73a931af34b7a0a3f467a79d9fe0df2d70 (fixed)

Vendor states this is fixed in 6fbc44731a4665cbe92a5090e9804a388a72214b (fixed)

Vendor states this is fixed in 7abfe467cd685f5da7ecb415441e45e3e4e2baa8 (fixed)

Vendor states this is fixed in 8b256d23361c51aa4b7fdb71176c1ca50966fb39 (fixed)

Vendor states this is fixed in c712d1ccbfb787620422b437a5b8fac0802547bd (fixed)

Vendor states this is fixed in 2.6.34 (unaffected)

Vendor states this is fixed in 4.14.303 (unaffected)

Vendor states this is fixed in 4.19.270 (unaffected)