{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46089", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.096Z", "datePublished": "2026-05-27T12:58:32.606Z", "dateUpdated": "2026-05-27T12:58:32.606Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-27T12:58:32.606Z"}, "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": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/block/zram/zram_drv.c"], "versions": [{"version": "0120dd6e4e202e19a0e011e486fb2da40a5ea279", "lessThan": "2d1f18efccdb8b29552399d024c36b705447e975", "status": "affected", "versionType": "git"}, {"version": "0120dd6e4e202e19a0e011e486fb2da40a5ea279", "lessThan": "35d3300f6357cfaa72db2721dc2b345b19bac5df", "status": "affected", "versionType": "git"}, {"version": "0120dd6e4e202e19a0e011e486fb2da40a5ea279", "lessThan": "a02363f71a79b755daa78a70d6b217f9c13c8c85", "status": "affected", "versionType": "git"}, {"version": "0120dd6e4e202e19a0e011e486fb2da40a5ea279", "lessThan": "68ce397e8236088fc53b9532d383a722288c8194", "status": "affected", "versionType": "git"}, {"version": "0120dd6e4e202e19a0e011e486fb2da40a5ea279", "lessThan": "e3668b371329ea036ff022ce8ecc82f8befcf003", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/block/zram/zram_drv.c"], "versions": [{"version": "6.4", "status": "affected"}, {"version": "0", "lessThan": "6.4", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.140", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.86", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.27", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.4", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1-rc1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "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-rc1"}]}]}], "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"}], "title": "zram: do not forget to endio for partial discard requests", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "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()."}], "id": "CVE-2026-46089", "lastModified": "2026-05-27T14:48:03.013", "metrics": {}, "published": "2026-05-27T14:17:30.443", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2d1f18efccdb8b29552399d024c36b705447e975"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/35d3300f6357cfaa72db2721dc2b345b19bac5df"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/68ce397e8236088fc53b9532d383a722288c8194"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a02363f71a79b755daa78a70d6b217f9c13c8c85"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e3668b371329ea036ff022ce8ecc82f8befcf003"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: zram: do not forget to endio for partial discard requests", "id": "2482111", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482111"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-772", "details": ["A flaw was found in the Linux kernel's zram module. This vulnerability allows a local user to cause a system hang, leading to a Denial of Service (DoS). The issue occurs because the zram module fails to properly handle partial discard requests, specifically by not calling `endio` when such requests are made. This oversight causes the `blkdiscard` utility to wait indefinitely, effectively freezing the system."], "name": "CVE-2026-46089", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46089\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46089\nhttps://lore.kernel.org/linux-cve-announce/2026052702-CVE-2026-46089-7cbd@gregkh/T"], "threat_severity": "Low"}

{"created": "2026-05-27T21:30:34.719201+00:00", "updated": "2026-05-27T21:30:34.719218+00:00", "vendors": [], "weaknesses": ["CWE-452", "CWE-759"]}