CVE-2025-38386 (GCVE-0-2025-38386)

Vulnerability from cvelistv5 – Published: 2025-07-25 12:53 – Updated: 2026-08-05 12:01
VLAI
Title
ACPICA: Refuse to evaluate a method if arguments are missing
Summary
In the Linux kernel, the following vulnerability has been resolved: ACPICA: Refuse to evaluate a method if arguments are missing As reported in [1], a platform firmware update that increased the number of method parameters and forgot to update a least one of its callers, caused ACPICA to crash due to use-after-free. Since this a result of a clear AML issue that arguably cannot be fixed up by the interpreter (it cannot produce missing data out of thin air), address it by making ACPICA refuse to evaluate a method if the caller attempts to pass fewer arguments than expected to it.
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 CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < b49d224d1830c46e20adce2a239c454cdab426f1 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 2219e49857ffd6aea1b1ca5214d3270f84623a16 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ab1e8491c19eb2ea0fda81ef28e841c7cb6399f5 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4305d936abde795c2ef6ba916de8f00a50f64d2d (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d547779e72cea9865b732cd45393c4cd02b3598e (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 18ff4ed6a33a7e3f2097710eacc96bea7696e803 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c9e4da550ae196132b990bd77ed3d8f2d9747f87 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6fcab2791543924d438e7fa49276d0998b0a069f (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.4.296 , ≤ 5.4.* (semver)
Unaffected: 5.10.240 , ≤ 5.10.* (semver)
Unaffected: 5.15.187 , ≤ 5.15.* (semver)
Unaffected: 6.1.144 , ≤ 6.1.* (semver)
Unaffected: 6.6.97 , ≤ 6.6.* (semver)
Unaffected: 6.12.37 , ≤ 6.12.* (semver)
Unaffected: 6.15.6 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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              "value": "AV:L - The vulnerable code is the ACPICA AML interpreter, reachable only through control-method evaluation on the local machine (sysfs/procfs ACPI attributes, thermal/battery/EC paths, device init, suspend/resume); there is no network or adjacent-network path to AML execution.\nAC:L - On an affected system the defect triggers deterministically whenever the mismatched method invocation is evaluated \u2014 no race to win, no memory-layout condition to guess, and the stale operand slots are populated by the same walk state\u0027s normal expression evaluation.\nPR:L - Many ACPI control methods are evaluated in response to reads of world-accessible sysfs attributes (thermal zone temperature, power-supply uevent, backlight), so an unprivileged local user can repeatedly drive the vulnerable nested-method path without any capability.\nUI:N - Triggering requires only the attacker\u0027s own read of an ACPI-backed sysfs attribute or normal runtime ACPI activity; no action by another user or administrator is needed.\nS:U - The use-after-free corrupts kernel heap objects in the ACPICA operand cache, staying entirely within the kernel\u0027s own security authority with no crossing into a hypervisor, IOMMU, or other security scope.\nC:H - This is a use-after-free: acpi_ut_update_object_reference() reads the type, package count, and element pointers out of freed, potentially reallocated slab memory, and the resulting premature frees leave live AML-visible buffer/string objects dangling, giving a path to disclose arbitrary kernel memory contents.\nI:H - Decrementing reference counts through stale pointers yields refcount underflow, double-free, and an arbitrary-decrement primitive against reclaimed slab memory \u2014 a classic heap-corruption route to control-flow hijack and arbitrary write.\nA:H - The reported real-world symptom was a kernel crash from the use-after-free, and refcount corruption of ACPICA operand objects reliably produces oops/panic, which an unprivileged user can trigger repeatedly."
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Como se inform\u00f3 en [1], una actualizaci\u00f3n de firmware de la plataforma que aument\u00f3 el n\u00famero de par\u00e1metros del m\u00e9todo y olvid\u00f3 actualizar al menos uno de sus llamadores provoc\u00f3 el bloqueo de ACPICA debido al use-after-free. Dado que esto se debe a un claro problema de AML que posiblemente no pueda ser solucionado por el int\u00e9rprete (no puede generar datos faltantes de la nada), se debe solucionar haciendo que ACPICA se niegue a evaluar un m\u00e9todo si el llamante intenta pasarle menos argumentos de los esperados.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/acpi/acpica/dsmethod.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"b49d224d1830c46e20adce2a239c454cdab426f1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"2219e49857ffd6aea1b1ca5214d3270f84623a16\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"ab1e8491c19eb2ea0fda81ef28e841c7cb6399f5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"4305d936abde795c2ef6ba916de8f00a50f64d2d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"d547779e72cea9865b732cd45393c4cd02b3598e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"18ff4ed6a33a7e3f2097710eacc96bea7696e803\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"c9e4da550ae196132b990bd77ed3d8f2d9747f87\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"6fcab2791543924d438e7fa49276d0998b0a069f\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/acpi/acpica/dsmethod.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.12\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.12\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.296\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.240\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.187\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.144\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.97\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.37\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.15.6\",\"lessThanOrEqual\":\"6.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.16\",\"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},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"5.4.296\",\"matchCriteriaId\":\"ACB9E771-D704-41E0-AD16-5F4BB6B3EA4A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.240\",\"matchCriteriaId\":\"0E73A49A-F9B2-470F-91B2-6FAB6239BDB6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.187\",\"matchCriteriaId\":\"4BD28D29-423C-4173-9DB8-3BA14E9F665D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.144\",\"matchCriteriaId\":\"81CF08DB-B7A2-4556-8AE3-ED9144F50E31\"},{\"vulnerable\":true,\"criteria\":\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Party Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-30T09:09:19+00:00",
      "cve": "CVE-2025-38386",
      "id": "CVE-2025-38386",
      "initial_release_date": "2025-07-25T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Denial of Service in ACPICA due to missing method arguments",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38386.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-28T17:01:23Z",
      "cve": "CVE-2025-38386",
      "id": "CVE-2025-38386",
      "initial_release_date": "2025-07-28T23:23:58Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "737",
      "product_status:known_not_affected": "46",
      "product_status:recommended": "509",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-38386",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-38386.json",
      "version": "45"
    }
  }
}



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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

Author Source Type Date Other

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.