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CVE-2026-72133 (GCVE-0-2026-72133)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:53 – Updated: 2026-08-17 05:40
VLAI
Title
spi: uniphier: Fix completion initialization order before devm_request_irq()
Summary
In the Linux kernel, the following vulnerability has been resolved: spi: uniphier: Fix completion initialization order before devm_request_irq() The driver calls devm_request_irq() before initializing the completion used by the interrupt handler. Because the interrupt may occur immediately after devm_request_irq(), the handler may execute before init_completion(). This may result in calling complete() on an uninitialized completion, causing undefined behavior. This has been observed with KASAN. Fix this by initializing the completion before registering the IRQ.
Severity
8.4 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 5ba155a4d4cc8e4cdd3db6df7d03271a3bd91177 , < b9fcf0db433d79648ace74bc2b8b88f91e306304 (git)
Affected: 5ba155a4d4cc8e4cdd3db6df7d03271a3bd91177 , < 82a5746c4c9e94f6f816ec7edea6ddc24417c6a5 (git)
Affected: 5ba155a4d4cc8e4cdd3db6df7d03271a3bd91177 , < f4bb0a91f7badd6d15ac8d783a1169d9e1e95c17 (git)
Affected: 5ba155a4d4cc8e4cdd3db6df7d03271a3bd91177 , < 49f6705d80b5e6175d8435d9c72b66bd516a8e89 (git)
Affected: 5ba155a4d4cc8e4cdd3db6df7d03271a3bd91177 , < 8b5798ce0007874c14611b8ee4ce6c749855260e (git)
Affected: 5ba155a4d4cc8e4cdd3db6df7d03271a3bd91177 , < d44b828eb551bd59ba9f22457825cc3db3a39fc1 (git)
Affected: 5ba155a4d4cc8e4cdd3db6df7d03271a3bd91177 , < 077a7bc1c32d3da9670c5e282ea3e5ac8a94be59 (git)
Affected: 5ba155a4d4cc8e4cdd3db6df7d03271a3bd91177 , < f3ad1c87d8201e54b66bd6072442f0b5d5a308ee (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.19
Unaffected: 0 , < 4.19 (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)
guessed Create a notification for this product.
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              "versionType": "original_commit_for_fix"
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: uniphier: Fix completion initialization order before devm_request_irq()\n\nThe driver calls devm_request_irq() before initializing the completion\nused by the interrupt handler. Because the interrupt may occur immediately\nafter devm_request_irq(), the handler may execute before init_completion().\n\nThis may result in calling complete() on an uninitialized completion,\ncausing undefined behavior. This has been observed with KASAN.\n\nFix this by initializing the completion before registering the IRQ."
        }
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            "baseSeverity": "HIGH",
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            "version": "3.1"
          },
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              "lang": "en",
              "value": "AV:L - The bug is in uniphier_spi_probe() on Socionext UniPhier embedded SoCs; uniphier_spi_handler() runs during platform driver initialization at boot/module load, not via network protocols, remote packets, or runtime SPI syscalls/ioctls.\nAC:L - Commit and reporter confirm the SPI controller IRQ may assert immediately after devm_request_irq(); stale or pending SSI status on warm reboot can invoke complete() on uninitialized xfer_done without attacker luck.\nPR:N - uniphier_spi_probe() has no credential or capability checks before devm_request_irq(); on affected UniPhier boards the vulnerable probe sequence runs automatically during kernel boot without the attacker holding Linux privileges.\nUI:N - No victim action is required; a pending SPI controller interrupt during driver probe at boot or reboot can trigger the uninitialized complete() path without opening /dev/spidev*, mounting filesystems, or other user operations.\nS:U - Impact is kernel panic from uninitialized completion/spinlock handling within the host kernel; this is not a VM escape, hypervisor bypass, IOMMU violation, or sandbox boundary crossing on embedded UniPhier systems.\nC:H - complete() takes an uninitialized wait.lock and swake_up_locked() walks a zeroed task_list, causing KASAN wild-memory-access and invalid kernel memory reads beyond a strictly bounded NULL fault.\nI:H - Calling complete() on an uninitialized completion corrupts spinlock/wait-queue metadata in uniphier_spi_priv; KASAN-reported undefined behavior in IRQ context can corrupt adjacent kzalloc slab data and enable further kernel control primitives.\nA:H - KASAN wild-memory-access and NULL list dereference in uniphier_spi_handler() during probe cause kernel oops/panic on affected UniPhier embedded devices, denying all system availability until reboot."
            }
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/f3ad1c87d8201e54b66bd6072442f0b5d5a308ee"
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      "title": "spi: uniphier: Fix completion initialization order before devm_request_irq()",
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    "dateReserved": "2026-08-09T03:40:39.907Z",
    "dateUpdated": "2026-08-17T05:40:43.316Z",
    "state": "PUBLISHED"
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-17T23:32:05+00:00",
      "cve": "CVE-2026-72133",
      "id": "CVE-2026-72133",
      "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: spi: uniphier: Fix completion initialization order before devm_request_irq()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72133.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.

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  • 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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  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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