{"id":"CVE-2026-46089","title":"zram: do not forget to endio for partial discard requests","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nzram: do not forget to endio for partial discard requests\n\nAs reported by Qu Wenruo and Avinesh Kumar, the following\n\n getconf PAGESIZE\n 65536\n blkdiscard -p 4k /dev/zr…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 0120dd6e4e202e19a0e011e486fb2da40a5ea279 < 2d1f18efccdb8b29552399d024c36b705447e975","Linux >= 0120dd6e4e202e19a0e011e486fb2da40a5ea279 < 35d3300f6357cfaa72db2721dc2b345b19bac5df","Linux >= 0120dd6e4e202e19a0e011e486fb2da40a5ea279 < a02363f71a79b755daa78a70d6b217f9c13c8c85","Linux >= 0120dd6e4e202e19a0e011e486fb2da40a5ea279 < 68ce397e8236088fc53b9532d383a722288c8194","Linux >= 0120dd6e4e202e19a0e011e486fb2da40a5ea279 < e3668b371329ea036ff022ce8ecc82f8befcf003","Linux 6.4"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T16:08:07.861895Z"},"published":"2026-05-27","updated":"2026-11-06","sourceUpdated":"2026-11-06T16:13:37.187Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-46089","references":[{"url":"https://git.kernel.org/stable/c/2d1f18efccdb8b29552399d024c36b705447e975"},{"url":"https://git.kernel.org/stable/c/35d3300f6357cfaa72db2721dc2b345b19bac5df"},{"url":"https://git.kernel.org/stable/c/a02363f71a79b755daa78a70d6b217f9c13c8c85"},{"url":"https://git.kernel.org/stable/c/68ce397e8236088fc53b9532d383a722288c8194"},{"url":"https://git.kernel.org/stable/c/e3668b371329ea036ff022ce8ecc82f8befcf003"}],"tags":["cve.org"],"epss":0.00135,"epssPercentile":0.03021,"ingestedAt":"2026-11-06T16:57:43.340Z","slug":"CVE-2026-46089","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nzram: do not forget to endio for partial discard requests\n\nAs reported by Qu Wenruo and Avinesh Kumar, the following\n\n getconf PAGESIZE\n 65536\n blkdiscard -p 4k /dev/zram0\n\ntakes literally forever to complete.  zram doesn't support partial\ndiscards and just returns immediately w/o doing any discard work in such\ncases.  The problem is that we forget to endio on our way out, so\nblkdiscard sleeps forever in submit_bio_wait().  Fix this by jumping to\nend_bio label, which does bio_endio().\n\n## Affected\n\n- `Linux >= 0120dd6e4e202e19a0e011e486fb2da40a5ea279 < 2d1f18efccdb8b29552399d024c36b705447e975`\n- `Linux >= 0120dd6e4e202e19a0e011e486fb2da40a5ea279 < 35d3300f6357cfaa72db2721dc2b345b19bac5df`\n- `Linux >= 0120dd6e4e202e19a0e011e486fb2da40a5ea279 < a02363f71a79b755daa78a70d6b217f9c13c8c85`\n- `Linux >= 0120dd6e4e202e19a0e011e486fb2da40a5ea279 < 68ce397e8236088fc53b9532d383a722288c8194`\n- `Linux >= 0120dd6e4e202e19a0e011e486fb2da40a5ea279 < e3668b371329ea036ff022ce8ecc82f8befcf003`\n- `Linux 6.4`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}