CVE-2022-50272None▾ SunlitIn 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 KA…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
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().
Linux >= 76f9a820c8672ada12ffa0903652c9e6f2429462 < 2b6a8a1a32746981044e7ab06649c804acb4068aLinux >= 76f9a820c8672ada12ffa0903652c9e6f2429462 < c712d1ccbfb787620422b437a5b8fac0802547bdLinux >= 76f9a820c8672ada12ffa0903652c9e6f2429462 < 7abfe467cd685f5da7ecb415441e45e3e4e2baa8Linux >= 76f9a820c8672ada12ffa0903652c9e6f2429462 < 8b256d23361c51aa4b7fdb71176c1ca50966fb39Linux >= 76f9a820c8672ada12ffa0903652c9e6f2429462 < 559891d430e3f3a178040c4371ed419edbfa7d65Linux >= 76f9a820c8672ada12ffa0903652c9e6f2429462 < 210fcf64be4db82c0e190e74b5111e4eef661a7aLinux >= 76f9a820c8672ada12ffa0903652c9e6f2429462 < 6fbc44731a4665cbe92a5090e9804a388a72214bLinux >= 76f9a820c8672ada12ffa0903652c9e6f2429462 < 6b60cf73a931af34b7a0a3f467a79d9fe0df2d70Linux >= 76f9a820c8672ada12ffa0903652c9e6f2429462 < 0ed554fd769a19ea8464bb83e9ac201002ef74adLinux 2.6.34Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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