Vulnerability-Lookup

GHSA-QC74-HC4J-XRP6

Vulnerability from github – Published: 2026-05-27 15:33 – Updated: 2026-05-27 15:33

Details

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().

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-46089"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:17:30Z",
    "severity": null
  },
  "details": "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": "GHSA-qc74-hc4j-xrp6",
  "modified": "2026-05-27T15:33:23Z",
  "published": "2026-05-27T15:33:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46089"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2d1f18efccdb8b29552399d024c36b705447e975"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/35d3300f6357cfaa72db2721dc2b345b19bac5df"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/68ce397e8236088fc53b9532d383a722288c8194"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a02363f71a79b755daa78a70d6b217f9c13c8c85"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e3668b371329ea036ff022ce8ecc82f8befcf003"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-46089 (GCVE-0-2026-46089)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:58 – Updated: 2026-05-27 12:58

Title

zram: do not forget to endio for partial discard requests

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().

Severity

No CVSS data available.

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/2d1f18efccdb8b295…
https://git.kernel.org/stable/c/35d3300f6357cfaa7…
https://git.kernel.org/stable/c/a02363f71a79b755d…
https://git.kernel.org/stable/c/68ce397e8236088fc…
https://git.kernel.org/stable/c/e3668b371329ea036…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 0120dd6e4e202e19a0e011e486fb2da40a5ea279 , < 2d1f18efccdb8b29552399d024c36b705447e975 (git) Affected: 0120dd6e4e202e19a0e011e486fb2da40a5ea279 , < 35d3300f6357cfaa72db2721dc2b345b19bac5df (git) Affected: 0120dd6e4e202e19a0e011e486fb2da40a5ea279 , < a02363f71a79b755daa78a70d6b217f9c13c8c85 (git) Affected: 0120dd6e4e202e19a0e011e486fb2da40a5ea279 , < 68ce397e8236088fc53b9532d383a722288c8194 (git) Affected: 0120dd6e4e202e19a0e011e486fb2da40a5ea279 , < e3668b371329ea036ff022ce8ecc82f8befcf003 (git)
Linux	Linux	Affected: 6.4 Unaffected: 0 , < 6.4 (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.86 , ≤ 6.12.* (semver) Unaffected: 6.18.27 , ≤ 6.18.* (semver) Unaffected: 7.0.4 , ≤ 7.0.* (semver) Unaffected: 7.1-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "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-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.140",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.86",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.27",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.4",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1-rc1",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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": "2026-05-27T12:58:32.606Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46089",
    "datePublished": "2026-05-27T12:58:32.606Z",
    "dateReserved": "2026-05-13T15:03:33.096Z",
    "dateUpdated": "2026-05-27T12:58:32.606Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-QC74-HC4J-XRP6

CVE-2026-46089 (GCVE-0-2026-46089)

Tags

Sightings

Nomenclature