CVE-2022-50272

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

State: Published
Severity: Not scored
Published: Sep 15, 2025
Updated: May 11, 2026
Reserved: Sep 15, 2025

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().

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	76f9a820c8672ada12ffa0903652c9e6f2429462 to before 2b6a8a1a32746981044e7ab06649c804acb4068aAffected 76f9a820c8672ada12ffa0903652c9e6f2429462 to before c712d1ccbfb787620422b437a5b8fac0802547bdAffected 76f9a820c8672ada12ffa0903652c9e6f2429462 to before 7abfe467cd685f5da7ecb415441e45e3e4e2baa8Affected 76f9a820c8672ada12ffa0903652c9e6f2429462 to before 8b256d23361c51aa4b7fdb71176c1ca50966fb39Affected 76f9a820c8672ada12ffa0903652c9e6f2429462 to before 559891d430e3f3a178040c4371ed419edbfa7d65Affected 76f9a820c8672ada12ffa0903652c9e6f2429462 to before 210fcf64be4db82c0e190e74b5111e4eef661a7aAffected 76f9a820c8672ada12ffa0903652c9e6f2429462 to before 6fbc44731a4665cbe92a5090e9804a388a72214bAffected 76f9a820c8672ada12ffa0903652c9e6f2429462 to before 6b60cf73a931af34b7a0a3f467a79d9fe0df2d70Affected 76f9a820c8672ada12ffa0903652c9e6f2429462 to before 0ed554fd769a19ea8464bb83e9ac201002ef74adAffected
LinuxLinux	2.6.34Affected before 2.6.34Not affected 4.9.337 through 4.9.Not affected 4.14.303 through 4.14.Not affected 4.19.270 through 4.19.Not affected 5.4.229 through 5.4.Not affected 5.10.163 through 5.10.Not affected 5.15.86 through 5.15.Not affected 6.0.16 through 6.0.Not affected 6.1.2 through 6.1.Not affected 6.2 and laterNot affected

Product

Versions

LinuxLinux

76f9a820c8672ada12ffa0903652c9e6f2429462 to before 2b6a8a1a32746981044e7ab06649c804acb4068aAffected
76f9a820c8672ada12ffa0903652c9e6f2429462 to before c712d1ccbfb787620422b437a5b8fac0802547bdAffected
76f9a820c8672ada12ffa0903652c9e6f2429462 to before 7abfe467cd685f5da7ecb415441e45e3e4e2baa8Affected
76f9a820c8672ada12ffa0903652c9e6f2429462 to before 8b256d23361c51aa4b7fdb71176c1ca50966fb39Affected
76f9a820c8672ada12ffa0903652c9e6f2429462 to before 559891d430e3f3a178040c4371ed419edbfa7d65Affected
76f9a820c8672ada12ffa0903652c9e6f2429462 to before 210fcf64be4db82c0e190e74b5111e4eef661a7aAffected
76f9a820c8672ada12ffa0903652c9e6f2429462 to before 6fbc44731a4665cbe92a5090e9804a388a72214bAffected
76f9a820c8672ada12ffa0903652c9e6f2429462 to before 6b60cf73a931af34b7a0a3f467a79d9fe0df2d70Affected
76f9a820c8672ada12ffa0903652c9e6f2429462 to before 0ed554fd769a19ea8464bb83e9ac201002ef74adAffected

LinuxLinux

2.6.34Affected
before 2.6.34Not affected
4.9.337 through 4.9.*Not affected
4.14.303 through 4.14.*Not affected
4.19.270 through 4.19.*Not affected
5.4.229 through 5.4.*Not affected
5.10.163 through 5.10.*Not affected
5.15.86 through 5.15.*Not affected
6.0.16 through 6.0.*Not affected
6.1.2 through 6.1.*Not affected
6.2 and laterNot affected

References

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