CVE-2023-54284

Summary

In the Linux kernel, the following vulnerability has been resolved:

media: av7110: prevent underflow in write_ts_to_decoder()

The buf[4] value comes from the user via ts_play(). It is a value in the u8 range. The final length we pass to av7110_ipack_instant_repack() is "len - (buf[4] + 1) - 4" so add a check to ensure that the length is not negative. It's not clear that passing a negative len value does anything bad necessarily, but it's not best practice.

With the new bounds checking the "if (!len)" condition is no longer possible or required so remove that.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxfd46d16d602ab7fd53cef7ff55b9dcb0b47ad3bf < 6680af5be9f08d830567e9118f76d3e64684db8faffected
LinuxLinuxfd46d16d602ab7fd53cef7ff55b9dcb0b47ad3bf < 6606e2404ee9e20a3ae5b42fc3660d41b739ed3eaffected
LinuxLinuxfd46d16d602ab7fd53cef7ff55b9dcb0b47ad3bf < 620b983589e0223876bf1463b01100a9c67b56baaffected
LinuxLinuxfd46d16d602ab7fd53cef7ff55b9dcb0b47ad3bf < 86ba65e5357bfbb6c082f68b265a292ee1bdde1daffected
LinuxLinuxfd46d16d602ab7fd53cef7ff55b9dcb0b47ad3bf < ca4ce92e3ec9fd3c7c936b912b95c53331d5159caffected
LinuxLinuxfd46d16d602ab7fd53cef7ff55b9dcb0b47ad3bf < 423350af9e27f005611bd881b1df2cab66de943daffected
LinuxLinuxfd46d16d602ab7fd53cef7ff55b9dcb0b47ad3bf < 77eeb4732135c18c2fdfab80839645b393f3e774affected
LinuxLinuxfd46d16d602ab7fd53cef7ff55b9dcb0b47ad3bf < 7b93ab60fe9ed04be0ff155bc30ad39dea23e22baffected
LinuxLinuxfd46d16d602ab7fd53cef7ff55b9dcb0b47ad3bf < eed9496a0501357aa326ddd6b71408189ed872ebaffected
LinuxLinux2.6.31affected
LinuxLinux0 < 2.6.31unaffected
LinuxLinux4.14.315 <= 4.14.*unaffected
LinuxLinux4.19.283 <= 4.19.*unaffected
LinuxLinux5.4.243 <= 5.4.*unaffected
LinuxLinux5.10.211 <= 5.10.*unaffected
LinuxLinux5.15.111 <= 5.15.*unaffected
LinuxLinux6.1.28 <= 6.1.*unaffected
LinuxLinux6.2.15 <= 6.2.*unaffected
LinuxLinux6.3.2 <= 6.3.*unaffected
LinuxLinux6.4 <= *unaffected

Weaknesses

References