CVE-2025-21832

Summary

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

block: don't revert iter for -EIOCBQUEUED

blkdev_read_iter() has a few odd checks, like gating the position and count adjustment on whether or not the result is bigger-than-or-equal to zero (where bigger than makes more sense), and not checking the return value of blkdev_direct_IO() before doing an iov_iter_revert(). The latter can lead to attempting to revert with a negative value, which when passed to iov_iter_revert() as an unsigned value will lead to throwing a WARN_ON() because unroll is bigger than MAX_RW_COUNT.

Be sane and don't revert for -EIOCBQUEUED, like what is done in other spots.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux3e1f941dd9f33776b3df4e30f741fe445ff773f3 < 6c26619effb1b4cb7d20b4e666ab8f71f6a53ccbaffected
LinuxLinux3e1f941dd9f33776b3df4e30f741fe445ff773f3 < 84671b0630ccb46ae9f1f99a45c7d63ffcd6a474affected
LinuxLinux3e1f941dd9f33776b3df4e30f741fe445ff773f3 < 68f16d3034a06661245ecd22f0d586a8b4e7c473affected
LinuxLinux3e1f941dd9f33776b3df4e30f741fe445ff773f3 < a58f136bad29f9ae721a29d98c042fddbee22f77affected
LinuxLinux3e1f941dd9f33776b3df4e30f741fe445ff773f3 < b13ee668e8280ca5b07f8ce2846b9957a8a10853affected
LinuxLinux5.17affected
LinuxLinux0 < 5.17unaffected
LinuxLinux6.1.129 <= 6.1.*unaffected
LinuxLinux6.6.78 <= 6.6.*unaffected
LinuxLinux6.12.14 <= 6.12.*unaffected
LinuxLinux6.13.3 <= 6.13.*unaffected
LinuxLinux6.14 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

References