Description

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

hwrng: core - Fix page fault dead lock on mmap-ed hwrng

There is a dead-lock in the hwrng device read path. This triggers
when the user reads from /dev/hwrng into memory also mmap-ed from
/dev/hwrng. The resulting page fault triggers a recursive read
which then dead-locks.

Fix this by using a stack buffer when calling copy_to_user.

Classification

CVE ID: CVE-2023-52615

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 5.06% (scored less or equal to compared to others)

EPSS Date: 2025-02-03 (when was this score calculated)

References

https://git.kernel.org/stable/c/eafd83b92f6c044007a3591cbd476bcf90455990
https://git.kernel.org/stable/c/5030d4c798863ccb266563201b341a099e8cdd48
https://git.kernel.org/stable/c/c6a8111aacbfe7a8a70f46cc0de8eed00561693c
https://git.kernel.org/stable/c/26cc6d7006f922df6cc4389248032d955750b2a0
https://git.kernel.org/stable/c/aa8aa16ed9adf1df05bb339d588cf485a011839e
https://git.kernel.org/stable/c/ecabe8cd456d3bf81e92c53b074732f3140f170d
https://git.kernel.org/stable/c/6822a14271786150e178869f1495cc03e74c5029
https://git.kernel.org/stable/c/78aafb3884f6bc6636efcc1760c891c8500b9922

Timeline