CVE-2026-98478

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: ufs: core: Keep internal commands dispatchable during error handling Commit 08b12cda6c44 ("scsi: ufs: core: Switch to scsi_get_internal_cmd()") switched UFS internal commands to allocate requests on hba->host->pseudo_sdev->request_queue, which shares the host tagset with regular LUNs. During error recovery, ufshcd_err_handling_prepare() calls blk_mq_quiesce_tagset(&hba->host->tag_set), marking all queues in the tagset as quiesced, including pseudo_sdev->request_queue. When ufshcd_verify_dev_init() subsequently issues internal commands (e.g. NOP OUT UPIU) via blk_execute_rq(), blk_mq_run_hw_queue() skips running the quiesced queue, resulting in an unrecoverable circular wait deadlock. Keep quiescing the tagset and unquiesce the pseudo SCSI device on top of that, so internal commands stay dispatchable while the logical units remain quiesced. Re-quiesce the pseudo device before unquiescing the tagset so that quiesce_depth stays balanced. Clock scaling and ufshcd_pause_command_processing() are unaffected: they keep quiescing the whole tagset, internal commands included.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-10-18 16:16:58.353000

Last modified

2026-10-19 10:18:58.750000

View original CVE JSON

{
  "id": "CVE-2026-98478",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-10-18T16:16:58.353",
  "lastModified": "2026-10-19T10:18:58.750",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: ufs: core: Keep internal commands dispatchable during error handling\n\nCommit 08b12cda6c44 (\"scsi: ufs: core: Switch to scsi_get_internal_cmd()\")\nswitched UFS internal commands to allocate requests on\nhba->host->pseudo_sdev->request_queue, which shares the host tagset with\nregular LUNs.\n\nDuring error recovery, ufshcd_err_handling_prepare() calls\nblk_mq_quiesce_tagset(&hba->host->tag_set), marking all queues in the\ntagset as quiesced, including pseudo_sdev->request_queue. When\nufshcd_verify_dev_init() subsequently issues internal commands (e.g. NOP\nOUT UPIU) via blk_execute_rq(), blk_mq_run_hw_queue() skips running the\nquiesced queue, resulting in an unrecoverable circular wait deadlock.\n\nKeep quiescing the tagset and unquiesce the pseudo SCSI device on top of\nthat, so internal commands stay dispatchable while the logical units remain\nquiesced. Re-quiesce the pseudo device before unquiescing the tagset so\nthat quiesce_depth stays balanced.\n\nClock scaling and ufshcd_pause_command_processing() are unaffected: they\nkeep quiescing the whole tagset, internal commands included."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/ufs/core/ufshcd.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "08b12cda6c44dc015bcc152613c35ee0ae8f37b9",
              "lessThan": "9f6f4840def931814c106fc800f57a2d26befee6",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "08b12cda6c44dc015bcc152613c35ee0ae8f37b9",
              "lessThan": "b52d695d062095327b944acf7daabbc816ab319b",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/ufs/core/ufshcd.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.19",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.19",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.9",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/9f6f4840def931814c106fc800f57a2d26befee6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b52d695d062095327b944acf7daabbc816ab319b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}