CVE-2026-68466 (GCVE-0-2026-68466)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:51 – Updated: 2026-08-17 05:39
VLAI
Title
mtd: rawnand: lpc32xx_slc: fail DMA transfer on completion timeout
Summary
In the Linux kernel, the following vulnerability has been resolved: mtd: rawnand: lpc32xx_slc: fail DMA transfer on completion timeout lpc32xx_xmit_dma() waits for the DMA completion callback but ignores wait_for_completion_timeout(). A timed out DMA transfer is therefore unmapped and reported as successful to the NAND read/write path. Return -ETIMEDOUT when the completion wait expires. Terminate the DMA channel before unmapping the scatterlist so the timed out transfer cannot continue to access the buffer after the error is returned.
Severity
8.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 2944a44da09e46b6db2fd2c3334f242b09e05c43 , < 307e4f4c1d4e1575b3495ecc6e41aa2adc40f491 (git)
Affected: 2944a44da09e46b6db2fd2c3334f242b09e05c43 , < c367af37ce7238c96c6071337149099467160746 (git)
Affected: 2944a44da09e46b6db2fd2c3334f242b09e05c43 , < 623c4d8e740debb4af28981e3d4e209f9d0260a4 (git)
Affected: 2944a44da09e46b6db2fd2c3334f242b09e05c43 , < bd4a622786f92e1f183f7557ab89dd32891cef60 (git)
Affected: 2944a44da09e46b6db2fd2c3334f242b09e05c43 , < 8f5c3ee53a5dc1a0f7cfd780485f2c8b5d17f91d (git)
Affected: 2944a44da09e46b6db2fd2c3334f242b09e05c43 , < cf7258f57d18026b8f77c0e80ff1805e9caf7250 (git)
Affected: 2944a44da09e46b6db2fd2c3334f242b09e05c43 , < cb2031f8b226efbd13735c07b075e5f14ec11f6d (git)
Affected: 2944a44da09e46b6db2fd2c3334f242b09e05c43 , < 17a8ce84964f243c8f89dc7353ac7e8d3137bc74 (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.7
Unaffected: 0 , < 3.7 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: rawnand: lpc32xx_slc: fail DMA transfer on completion timeout\n\nlpc32xx_xmit_dma() waits for the DMA completion callback but ignores\nwait_for_completion_timeout(). A timed out DMA transfer is therefore\nunmapped and reported as successful to the NAND read/write path.\n\nReturn -ETIMEDOUT when the completion wait expires. Terminate the DMA\nchannel before unmapping the scatterlist so the timed out transfer cannot\ncontinue to access the buffer after the error is returned."
        }
      ],
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
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              "value": "AV:L - The lpc32xx SLC NAND driver is only exercised through local kernel storage entry points\u2014read/write/ioctl on /dev/mtd* or mtdblock, VFS access to flash-backed mounts (UBIFS/JFFS2/squashfs), or in-kernel mtd_read/mtd_write callers\u2014not via any network packet or remote protocol handler.\nAC:L - An attacker with flash access can repeatedly issue MTD or filesystem read/write operations to stress the NAND controller and DMA engine, hunting for completion timeouts; they control I/O timing and can retry without depending on rare victim-only state beyond issuing local storage traffic.\nPR:L - Unprivileged local users on typical LPC32xx embedded systems can reach the vulnerable DMA path by reading executables or files from flash-backed root filesystems or world-readable mtdblock nodes; root-only /dev/mtd access is not required for the read path through lpc32xx_nand_read_page_syndrome.\nUI:N - Exploitation requires only attacker-initiated storage I/O against the NAND-backed device or mounted filesystem; no victim interaction such as plugging media, approving dialogs, or opening attacker-supplied content is needed.\nS:C - On DMA timeout the driver unmaps the scatterlist while in-flight DMA may continue, allowing the NAND DMA engine to access physical pages reused for unrelated kernel objects\u2014crossing the intended DMA buffer security boundary of the driver.\nC:H - Continued DEV_TO_MEM DMA after dma_unmap_sg can write into repurposed physical pages and leak their prior contents upward; falsely reporting success also returns incomplete or attacker-influenced NAND page data, and post-unmap DMA enables arbitrary kernel memory disclosure via controlled page reuse.\nI:H - In-flight DMA after dma_unmap_sg provides a DMA-after-free style write primitive that can corrupt adjacent kernel heap or stack objects, enabling control-flow hijacking and privilege escalation beyond the intended NAND transfer buffer.\nA:H - DMA-after-unmap corruption commonly provokes kernel oops, panic, or hang; falsely successful timed-out writes can also corrupt flash contents or filesystem metadata on industrial LPC32xx appliances, causing sustained denial of service or device bricking."
            }
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        "dateUpdated": "2026-08-17T05:39:10.682Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/307e4f4c1d4e1575b3495ecc6e41aa2adc40f491"
        },
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          "url": "https://git.kernel.org/stable/c/bd4a622786f92e1f183f7557ab89dd32891cef60"
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    "datePublished": "2026-08-15T05:51:25.212Z",
    "dateReserved": "2026-07-30T09:28:09.396Z",
    "dateUpdated": "2026-08-17T05:39:10.682Z",
    "state": "PUBLISHED"
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      "date": "2026-08-24",
      "epss": "0.00129",
      "percentile": "0.02791"
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Terminate the DMA\\nchannel before unmapping the scatterlist so the timed out transfer cannot\\ncontinue to access the buffer after the error is returned.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/mtd/nand/raw/lpc32xx_slc.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2944a44da09e46b6db2fd2c3334f242b09e05c43\",\"lessThan\":\"307e4f4c1d4e1575b3495ecc6e41aa2adc40f491\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2944a44da09e46b6db2fd2c3334f242b09e05c43\",\"lessThan\":\"c367af37ce7238c96c6071337149099467160746\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2944a44da09e46b6db2fd2c3334f242b09e05c43\",\"lessThan\":\"623c4d8e740debb4af28981e3d4e209f9d0260a4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2944a44da09e46b6db2fd2c3334f242b09e05c43\",\"lessThan\":\"bd4a622786f92e1f183f7557ab89dd32891cef60\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2944a44da09e46b6db2fd2c3334f242b09e05c43\",\"lessThan\":\"8f5c3ee53a5dc1a0f7cfd780485f2c8b5d17f91d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2944a44da09e46b6db2fd2c3334f242b09e05c43\",\"lessThan\":\"cf7258f57d18026b8f77c0e80ff1805e9caf7250\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2944a44da09e46b6db2fd2c3334f242b09e05c43\",\"lessThan\":\"cb2031f8b226efbd13735c07b075e5f14ec11f6d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2944a44da09e46b6db2fd2c3334f242b09e05c43\",\"lessThan\":\"17a8ce84964f243c8f89dc7353ac7e8d3137bc74\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/mtd/nand/raw/lpc32xx_slc.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.7\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.7\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.97\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.40\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.5\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"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:C/C:H/I:H/A:H\",\"baseScore\":8.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.0,\"impactScore\":6.0}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/17a8ce84964f243c8f89dc7353ac7e8d3137bc74\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/307e4f4c1d4e1575b3495ecc6e41aa2adc40f491\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/623c4d8e740debb4af28981e3d4e209f9d0260a4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8f5c3ee53a5dc1a0f7cfd780485f2c8b5d17f91d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bd4a622786f92e1f183f7557ab89dd32891cef60\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c367af37ce7238c96c6071337149099467160746\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cb2031f8b226efbd13735c07b075e5f14ec11f6d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cf7258f57d18026b8f77c0e80ff1805e9caf7250\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-17T14:55:10+00:00",
      "cve": "CVE-2026-68466",
      "id": "CVE-2026-68466",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mtd: rawnand: lpc32xx_slc: fail DMA transfer on completion timeout",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68466.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.
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  • 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.