CVE-2026-46089

MEDIUM

zram: do not forget to endio for partial discard requests

Title source: cna
STIX 2.1

Description

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().

Scores

CVSS v3 5.5
EPSS 0.0012
EPSS Percentile 2.3%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

Status published
Products (18)
linux/Kernel 6.13.0 - 6.18.27linux
linux/Kernel 6.19.0 - 7.0.4linux
linux/Kernel 6.4.0 - 6.6.140linux
linux/Kernel 6.7.0 - 6.12.86linux
Linux/Linux < 6.4
Linux/Linux 0120dd6e4e202e19a0e011e486fb2da40a5ea279 - 2d1f18efccdb8b29552399d024c36b705447e975
Linux/Linux 0120dd6e4e202e19a0e011e486fb2da40a5ea279 - 35d3300f6357cfaa72db2721dc2b345b19bac5df
Linux/Linux 0120dd6e4e202e19a0e011e486fb2da40a5ea279 - 68ce397e8236088fc53b9532d383a722288c8194
Linux/Linux 0120dd6e4e202e19a0e011e486fb2da40a5ea279 - a02363f71a79b755daa78a70d6b217f9c13c8c85
Linux/Linux 0120dd6e4e202e19a0e011e486fb2da40a5ea279 - e3668b371329ea036ff022ce8ecc82f8befcf003
... and 8 more
Published May 27, 2026
Tracked Since May 27, 2026