CVE-2022-50020

Summary

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

ext4: avoid resizing to a partial cluster size

This patch avoids an attempt to resize the filesystem to an unaligned cluster boundary. An online resize to a size that is not integral to cluster size results in the last iteration attempting to grow the fs by a negative amount, which trips a BUG_ON and leaves the fs with a corrupted in-memory superblock.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxd77147ff443b255d82c907a632c825b2cc610b10 < 7bdfb01fc5f6b3696728aeb527c50386e0ee09a1affected
LinuxLinuxd77147ff443b255d82c907a632c825b2cc610b10 < a6805b3dcf5cd41f2ae3a03dca43411135b99849affected
LinuxLinuxd77147ff443b255d82c907a632c825b2cc610b10 < 80288883294c5b4ed18bae0d8bd9c4a12f297074affected
LinuxLinuxd77147ff443b255d82c907a632c825b2cc610b10 < 72b850a2a996f72541172e7cf686d54a2b29bcd8affected
LinuxLinuxd77147ff443b255d82c907a632c825b2cc610b10 < 0082e99a9074ff88eff729c70c93454c8588d8e1affected
LinuxLinuxd77147ff443b255d82c907a632c825b2cc610b10 < 69cb8e9d8cd97cdf5e293b26d70a9dee3e35e6bdaffected
LinuxLinux4.15affected
LinuxLinux0 < 4.15unaffected
LinuxLinux4.19.256 <= 4.19.*unaffected
LinuxLinux5.4.211 <= 5.4.*unaffected
LinuxLinux5.10.138 <= 5.10.*unaffected
LinuxLinux5.15.63 <= 5.15.*unaffected
LinuxLinux5.19.4 <= 5.19.*unaffected
LinuxLinux6.0 <= *unaffected

Weaknesses

References