FKIE_CVE-2026-46089

Vulnerability from fkie_nvd - Published: 2026-05-27 14:17 - Updated: 2026-06-17 10:53
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().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2d1f18efccdb8b29552399d024c36b705447e975
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/35d3300f6357cfaa72db2721dc2b345b19bac5df
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/68ce397e8236088fc53b9532d383a722288c8194
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a02363f71a79b755daa78a70d6b217f9c13c8c85
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e3668b371329ea036ff022ce8ecc82f8befcf003
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/block/zram/zram_drv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2d1f18efccdb8b29552399d024c36b705447e975",
              "status": "affected",
              "version": "0120dd6e4e202e19a0e011e486fb2da40a5ea279",
              "versionType": "git"
            },
            {
              "lessThan": "35d3300f6357cfaa72db2721dc2b345b19bac5df",
              "status": "affected",
              "version": "0120dd6e4e202e19a0e011e486fb2da40a5ea279",
              "versionType": "git"
            },
            {
              "lessThan": "a02363f71a79b755daa78a70d6b217f9c13c8c85",
              "status": "affected",
              "version": "0120dd6e4e202e19a0e011e486fb2da40a5ea279",
              "versionType": "git"
            },
            {
              "lessThan": "68ce397e8236088fc53b9532d383a722288c8194",
              "status": "affected",
              "version": "0120dd6e4e202e19a0e011e486fb2da40a5ea279",
              "versionType": "git"
            },
            {
              "lessThan": "e3668b371329ea036ff022ce8ecc82f8befcf003",
              "status": "affected",
              "version": "0120dd6e4e202e19a0e011e486fb2da40a5ea279",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/block/zram/zram_drv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
              "lessThan": "6.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.86",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.27",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "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\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()."
    }
  ],
  "id": "CVE-2026-46089",
  "lastModified": "2026-06-17T10:53:02.997",
  "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"
}


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