CVE-2026-46089 (GCVE-0-2026-46089)
Vulnerability from cvelistv5
Published
2026-05-27 12:58
Modified
2026-06-14 17:53
Severity ?
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().
Impacted products
Vendor Product Version
Linux Linux Version: 0120dd6e4e202e19a0e011e486fb2da40a5ea279
Version: 0120dd6e4e202e19a0e011e486fb2da40a5ea279
Version: 0120dd6e4e202e19a0e011e486fb2da40a5ea279
Version: 0120dd6e4e202e19a0e011e486fb2da40a5ea279
Version: 0120dd6e4e202e19a0e011e486fb2da40a5ea279
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{
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          "programFiles": [
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      "cpeApplicability": [
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      "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\u0027t 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()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-14T17:53:34.164Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2d1f18efccdb8b29552399d024c36b705447e975"
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          "url": "https://git.kernel.org/stable/c/35d3300f6357cfaa72db2721dc2b345b19bac5df"
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        {
          "url": "https://git.kernel.org/stable/c/e3668b371329ea036ff022ce8ecc82f8befcf003"
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      ],
      "title": "zram: do not forget to endio for partial discard requests",
      "x_generator": {
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46089",
    "datePublished": "2026-05-27T12:58:32.606Z",
    "dateReserved": "2026-05-13T15:03:33.096Z",
    "dateUpdated": "2026-06-14T17:53:34.164Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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