CVE-2026-93057

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: ufs: core: Avoid possible memory reclaim deadlock in TX EQTR context TX EQTR may run while devfreq gear scaling has quiesced the UFS tagset. In that context, functions ufshcd_tx_eqtr(), __ufshcd_tx_eqtr() and ufs_qcom_get_rx_fom() allocate memory with GFP_KERNEL. If direct reclaim is triggered, reclaim/writeback can depend on I/O to UFS device. Because the queue is quiesced, this can cause deadlock. Use memalloc_noio_save/restore() in ufshcd_tx_eqtr() to cover all allocations in the TX EQTR call tree, including: - params->eqtr_record in ufshcd_tx_eqtr() - eqtr_data in __ufshcd_tx_eqtr() - params in ufs_qcom_get_rx_fom() This is preferred over tagging individual call sites with GFP_NOIO, as it automatically covers any future allocations added anywhere in the call tree without requiring each caller to be aware of this constraint. [mkp: fix label as suggested by Bart]

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

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

Published

2026-09-17 17:17:59.323000

Last modified

2026-10-19 10:16:55.600000

View original CVE JSON

{
  "id": "CVE-2026-93057",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-17T17:17:59.323",
  "lastModified": "2026-10-19T10:16:55.600",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: ufs: core: Avoid possible memory reclaim deadlock in TX EQTR context\n\nTX EQTR may run while devfreq gear scaling has quiesced the UFS\ntagset. In that context, functions ufshcd_tx_eqtr(), __ufshcd_tx_eqtr()\nand ufs_qcom_get_rx_fom() allocate memory with GFP_KERNEL. If direct\nreclaim is triggered, reclaim/writeback can depend on I/O to UFS\ndevice. Because the queue is quiesced, this can cause deadlock.\n\nUse memalloc_noio_save/restore() in ufshcd_tx_eqtr() to cover all\nallocations in the TX EQTR call tree, including:\n\n - params->eqtr_record in ufshcd_tx_eqtr()\n\n - eqtr_data in __ufshcd_tx_eqtr()\n\n - params in ufs_qcom_get_rx_fom()\n\nThis is preferred over tagging individual call sites with GFP_NOIO, as it\nautomatically covers any future allocations added anywhere in the call tree\nwithout requiring each caller to be aware of this constraint.\n\n[mkp: fix label as suggested by Bart]"
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/ufs/core/ufs-txeq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "03e5d38e2f985d8d0b0a60508c0b422f664808e3",
              "lessThan": "a28a7d9b3bb116da788ae492c90465ec1a7fa6e8",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "03e5d38e2f985d8d0b0a60508c0b422f664808e3",
              "lessThan": "760fc6f0e25a72832c2fcf37ecf5f1b770ec8374",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/ufs/core/ufs-txeq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "7.1",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "7.1",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.6",
              "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/760fc6f0e25a72832c2fcf37ecf5f1b770ec8374",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a28a7d9b3bb116da788ae492c90465ec1a7fa6e8",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}