CVE-2026-64221 (GCVE-0-2026-64221)

Vulnerability from cvelistv5 – Published: 2026-07-24 15:23 – Updated: 2026-08-05 12:40
VLAI
Title
spi: ti-qspi: fix use-after-free after DMA setup failure
Summary
In the Linux kernel, the following vulnerability has been resolved: spi: ti-qspi: fix use-after-free after DMA setup failure The driver falls back to PIO mode if DMA setup fails during probe. Make sure to clear the DMA channel pointer also if buffer allocation fails to avoid passing a pointer to the released channel to the DMA engine (or trying to free the channel a second time on late probe errors or driver unbind). This issue was flagged by Sashiko when reviewing a devres allocation conversion patch.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83 , < 9c6f306a8140962c7284197db54b96fdb5f468d6 (git)
Affected: c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83 , < 3bbbe7ae3fdada0df4157c1ffe989f92dfa8dcd6 (git)
Affected: c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83 , < d6f422b122922d1abee907d673bcc990e5f3672d (git)
Affected: c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83 , < f2dc841d7dc9063fe9b47ced869b1271e55052ae (git)
Affected: c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83 , < 1cd927002120678bd5d23c760246639caa53040e (git)
Affected: c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83 , < d7a076fb596c7b408ed6df74793a597990a6d860 (git)
Affected: c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83 , < 178b9b570c0f75fa7e691490520328b20d19138e (git)
Affected: c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83 , < ea6ec3343e05f7937a53eb6d7617b3abdb4abc19 (git)
Create a notification for this product.
Linux Linux Affected: 4.12
Unaffected: 0 , < 4.12 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.142 , ≤ 6.6.* (semver)
Unaffected: 6.12.92 , ≤ 6.12.* (semver)
Unaffected: 6.18.34 , ≤ 6.18.* (semver)
Unaffected: 7.0.11 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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{
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          "programFiles": [
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              "status": "unaffected",
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              "versionType": "original_commit_for_fix"
            }
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      ],
      "cpeApplicability": [
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          "nodes": [
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                  "versionEndExcluding": "5.10.258",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
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                {
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                  "versionEndExcluding": "5.15.209",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.175",
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                  "vulnerable": true
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              "negate": false,
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: ti-qspi: fix use-after-free after DMA setup failure\n\nThe driver falls back to PIO mode if DMA setup fails during probe.\n\nMake sure to clear the DMA channel pointer also if buffer allocation\nfails to avoid passing a pointer to the released channel to the DMA\nengine (or trying to free the channel a second time on late probe errors\nor driver unbind).\n\nThis issue was flagged by Sashiko when reviewing a devres allocation\nconversion patch."
        }
      ],
      "metrics": [
        {
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
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              "lang": "en",
              "value": "AV:L - The vulnerable path is reachable through local SPI-memory reads, including read(2) on an accessible file in a TI QSPI-backed JFFS2 or UBIFS filesystem.\nAC:L - Once memory pressure causes the coherent-buffer allocation failure, ordinary flash reads deterministically reuse the released channel without requiring a race or uncontrollable heap layout.\nPR:L - An ordinary unprivileged user can trigger flash I/O by reading a permitted file on a mounted QSPI-backed filesystem, with no capability check in the read path.\nUI:N - The attacker directly initiates the read and requires no action from another user.\nS:U - The resulting kernel and DMA corruption remains within the host kernel\u0027s security authority and does not inherently cross a VM or IOMMU boundary.\nC:H - Reuse of the released DMA channel can transfer data from unintended physical addresses into kernel buffers, enabling serious kernel-memory disclosure.\nI:H - Stale DMA submissions or a second channel release can corrupt DMA state, interfere with a reassigned client, and plausibly provide memory-corruption or code-execution primitives.\nA:H - Reusing or releasing the stale channel can cause an oops, panic, DMA timeout, or loss of access to a critical flash-backed filesystem."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:40:08.448Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        },
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        },
        {
          "url": "https://git.kernel.org/stable/c/ea6ec3343e05f7937a53eb6d7617b3abdb4abc19"
        }
      ],
      "title": "spi: ti-qspi: fix use-after-free after DMA setup failure",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  },
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64221",
    "datePublished": "2026-07-24T15:23:07.502Z",
    "dateReserved": "2026-07-19T15:36:31.770Z",
    "dateUpdated": "2026-08-05T12:40:08.448Z",
    "state": "PUBLISHED"
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patch.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/spi/spi-ti-qspi.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83\",\"lessThan\":\"9c6f306a8140962c7284197db54b96fdb5f468d6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83\",\"lessThan\":\"3bbbe7ae3fdada0df4157c1ffe989f92dfa8dcd6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83\",\"lessThan\":\"d6f422b122922d1abee907d673bcc990e5f3672d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83\",\"lessThan\":\"f2dc841d7dc9063fe9b47ced869b1271e55052ae\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83\",\"lessThan\":\"1cd927002120678bd5d23c760246639caa53040e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83\",\"lessThan\":\"d7a076fb596c7b408ed6df74793a597990a6d860\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83\",\"lessThan\":\"178b9b570c0f75fa7e691490520328b20d19138e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83\",\"lessThan\":\"ea6ec3343e05f7937a53eb6d7617b3abdb4abc19\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/spi/spi-ti-qspi.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.12\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.12\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.258\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.209\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.175\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.142\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.92\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.34\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.11\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/178b9b570c0f75fa7e691490520328b20d19138e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1cd927002120678bd5d23c760246639caa53040e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3bbbe7ae3fdada0df4157c1ffe989f92dfa8dcd6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9c6f306a8140962c7284197db54b96fdb5f468d6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d6f422b122922d1abee907d673bcc990e5f3672d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d7a076fb596c7b408ed6df74793a597990a6d860\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ea6ec3343e05f7937a53eb6d7617b3abdb4abc19\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f2dc841d7dc9063fe9b47ced869b1271e55052ae\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-08-05T12:42:23+00:00",
      "cve": "CVE-2026-64221",
      "id": "CVE-2026-64221",
      "initial_release_date": "2026-07-24T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: spi: ti-qspi: fix use-after-free after DMA setup failure",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64221.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.