CVE-2026-46089

Summary

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

zram: do not forget to endio for partial discard requests

As reported by Qu Wenruo and Avinesh Kumar, the following

getconf PAGESIZE 65536 blkdiscard -p 4k /dev/zram0

takes literally forever to complete. zram doesn't support partial discards and just returns immediately w/o doing any discard work in such cases. The problem is that we forget to endio on our way out, so blkdiscard sleeps forever in submit_bio_wait(). Fix this by jumping to end_bio label, which does bio_endio().

Affected Software

VendorProductVersion RangeStatus
LinuxLinux0120dd6e4e202e19a0e011e486fb2da40a5ea279 < 2d1f18efccdb8b29552399d024c36b705447e975affected
LinuxLinux0120dd6e4e202e19a0e011e486fb2da40a5ea279 < 35d3300f6357cfaa72db2721dc2b345b19bac5dfaffected
LinuxLinux0120dd6e4e202e19a0e011e486fb2da40a5ea279 < a02363f71a79b755daa78a70d6b217f9c13c8c85affected
LinuxLinux0120dd6e4e202e19a0e011e486fb2da40a5ea279 < 68ce397e8236088fc53b9532d383a722288c8194affected
LinuxLinux0120dd6e4e202e19a0e011e486fb2da40a5ea279 < e3668b371329ea036ff022ce8ecc82f8befcf003affected
LinuxLinux6.4affected
LinuxLinux0 < 6.4unaffected
LinuxLinux6.6.140 <= 6.6.*unaffected
LinuxLinux6.12.86 <= 6.12.*unaffected
LinuxLinux6.18.27 <= 6.18.*unaffected
LinuxLinux7.0.4 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References