Description

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

dm-crypt: don't modify the data when using authenticated encryption

It was said that authenticated encryption could produce invalid tag when
the data that is being encrypted is modified [1]. So, fix this problem by
copying the data into the clone bio first and then encrypt them inside the
clone bio.

This may reduce performance, but it is needed to prevent the user from
corrupting the device by writing data with O_DIRECT and modifying them at
the same time.

[1] https://lore.kernel.org/all/20240207004723.GA35324@sol.localdomain/T/

Classification

CVE ID: CVE-2024-26763

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 15.26% (scored less or equal to compared to others)

EPSS Date: 2025-02-04 (when was this score calculated)

References

https://git.kernel.org/stable/c/43a202bd552976497474ae144942e32cc5f34d7e
https://git.kernel.org/stable/c/0dccbb93538fe89a86c6de31d4b1c8c560848eaa
https://git.kernel.org/stable/c/3c652f6fa1e1f9f02c3fbf359d260ad153ec5f90
https://git.kernel.org/stable/c/1a4371db68a31076afbe56ecce34fbbe6c80c529
https://git.kernel.org/stable/c/e08c2a8d27e989f0f5b0888792643027d7e691e6
https://git.kernel.org/stable/c/64ba01a365980755732972523600a961c4266b75
https://git.kernel.org/stable/c/d9e3763a505e50ba3bd22846f2a8db99429fb857
https://git.kernel.org/stable/c/50c70240097ce41fe6bce6478b80478281e4d0f7

Timeline