CVE-2022-49044

Summary

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

dm integrity: fix memory corruption when tag_size is less than digest size

It is possible to set up dm-integrity in such a way that the "tag_size" parameter is less than the actual digest size. In this situation, a part of the digest beyond tag_size is ignored.

In this case, dm-integrity would write beyond the end of the ic->recalc_tags array and corrupt memory. The corruption happened in integrity_recalc->integrity_sector_checksum->crypto_shash_final.

Fix this corruption by increasing the tags array so that it has enough padding at the end to accomodate the loop in integrity_recalc() being able to write a full digest size for the last member of the tags array.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux7eada909bfd7ac90a4522e56aa3179d1fd68cd14 < 6a95d91c0b315c965198f6ab7dec7c94129e17e0affected
LinuxLinux7eada909bfd7ac90a4522e56aa3179d1fd68cd14 < 7f84c937222944c03f4615ca4742df6bed0e5adfaffected
LinuxLinux7eada909bfd7ac90a4522e56aa3179d1fd68cd14 < cd02b2687d66f0a8e716384de4b9a0671331f1dcaffected
LinuxLinux7eada909bfd7ac90a4522e56aa3179d1fd68cd14 < 6b4bf97587ef6c1927a78934b700204920655123affected
LinuxLinux7eada909bfd7ac90a4522e56aa3179d1fd68cd14 < 4d485cf9b609709e45d5113e6e2b1b01254b2fe9affected
LinuxLinux7eada909bfd7ac90a4522e56aa3179d1fd68cd14 < 08c1af8f1c13bbf210f1760132f4df24d0ed46d6affected
LinuxLinux4.12affected
LinuxLinux0 < 4.12unaffected
LinuxLinux4.19.240 <= 4.19.*unaffected
LinuxLinux5.4.190 <= 5.4.*unaffected
LinuxLinux5.10.112 <= 5.10.*unaffected
LinuxLinux5.15.35 <= 5.15.*unaffected
LinuxLinux5.17.4 <= 5.17.*unaffected
LinuxLinux5.18 <= *unaffected

Weaknesses

References