{"id":"CVE-2026-46089","state":"PUBLISHED","title":"zram: do not forget to endio for partial discard requests","description":"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/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().","publishedAt":"2026-05-27T12:58:32.606Z","updatedAt":"2026-06-14T17:53:34.164Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0120dd6e4e202e19a0e011e486fb2da40a5ea279","status":"affected","lessThan":"2d1f18efccdb8b29552399d024c36b705447e975","versionType":"git"},{"version":"0120dd6e4e202e19a0e011e486fb2da40a5ea279","status":"affected","lessThan":"35d3300f6357cfaa72db2721dc2b345b19bac5df","versionType":"git"},{"version":"0120dd6e4e202e19a0e011e486fb2da40a5ea279","status":"affected","lessThan":"a02363f71a79b755daa78a70d6b217f9c13c8c85","versionType":"git"},{"version":"0120dd6e4e202e19a0e011e486fb2da40a5ea279","status":"affected","lessThan":"68ce397e8236088fc53b9532d383a722288c8194","versionType":"git"},{"version":"0120dd6e4e202e19a0e011e486fb2da40a5ea279","status":"affected","lessThan":"e3668b371329ea036ff022ce8ecc82f8befcf003","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/zram/zram_drv.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.4","versionType":"semver"},{"version":"6.6.140","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.86","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.27","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.4","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/zram/zram_drv.c"]}],"references":["https://git.kernel.org/stable/c/2d1f18efccdb8b29552399d024c36b705447e975","https://git.kernel.org/stable/c/35d3300f6357cfaa72db2721dc2b345b19bac5df","https://git.kernel.org/stable/c/a02363f71a79b755daa78a70d6b217f9c13c8c85","https://git.kernel.org/stable/c/68ce397e8236088fc53b9532d383a722288c8194","https://git.kernel.org/stable/c/e3668b371329ea036ff022ce8ecc82f8befcf003"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/46xxx/CVE-2026-46089.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46089","state":"PUBLISHED","datePublished":"2026-05-27T12:58:32.606Z","dateUpdated":"2026-06-14T17:53:34.164Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.096Z"},"containers":{"cna":{"title":"zram: do not forget to endio for partial discard requests","descriptions":[{"lang":"en","value":"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/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()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0120dd6e4e202e19a0e011e486fb2da40a5ea279","status":"affected","lessThan":"2d1f18efccdb8b29552399d024c36b705447e975","versionType":"git"},{"version":"0120dd6e4e202e19a0e011e486fb2da40a5ea279","status":"affected","lessThan":"35d3300f6357cfaa72db2721dc2b345b19bac5df","versionType":"git"},{"version":"0120dd6e4e202e19a0e011e486fb2da40a5ea279","status":"affected","lessThan":"a02363f71a79b755daa78a70d6b217f9c13c8c85","versionType":"git"},{"version":"0120dd6e4e202e19a0e011e486fb2da40a5ea279","status":"affected","lessThan":"68ce397e8236088fc53b9532d383a722288c8194","versionType":"git"},{"version":"0120dd6e4e202e19a0e011e486fb2da40a5ea279","status":"affected","lessThan":"e3668b371329ea036ff022ce8ecc82f8befcf003","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/zram/zram_drv.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.4","versionType":"semver"},{"version":"6.6.140","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.86","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.27","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.4","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/zram/zram_drv.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-14T17:53:34.164Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.6.140"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.12.86"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.18.27"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"7.0.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}