CVE-2025-38080 (GCVE-0-2025-38080)

Vulnerability from cvelistv5 – Published: 2025-06-18 09:33 – Updated: 2026-08-05 11:59
VLAI
Title
drm/amd/display: Increase block_sequence array size
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Increase block_sequence array size [Why] It's possible to generate more than 50 steps in hwss_build_fast_sequence, for example with a 6-pipe asic where all pipes are in one MPC chain. This overflows the block_sequence buffer and corrupts block_sequence_steps, causing a crash. [How] Expand block_sequence to 100 items. A naive upper bound on the possible number of steps for a 6-pipe asic, ignoring the potential for steps to be mutually exclusive, is 91 with current code, therefore 100 is sufficient.
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: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c , < de67e80ab48f1f23663831007a2fa3c1471a7757 (git)
Affected: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c , < e55c5704b12eeea27e212bfab8f7e51ad3e8ac1f (git)
Affected: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c , < bf1666072e7482317cf2302621766482a21a62c7 (git)
Affected: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c , < 3a7810c212bcf2f722671dadf4b23ff70a7d23ee (git)
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Linux Linux Affected: 4.15
Unaffected: 0 , < 4.15 (semver)
Unaffected: 6.6.93 , ≤ 6.6.* (semver)
Unaffected: 6.12.31 , ≤ 6.12.* (semver)
Unaffected: 6.14.9 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
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          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/display/dc/inc/core_types.h"
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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\ndrm/amd/display: Increase block_sequence array size\n\n[Why]\nIt\u0027s possible to generate more than 50 steps in hwss_build_fast_sequence,\nfor example with a 6-pipe asic where all pipes are in one MPC chain. This\noverflows the block_sequence buffer and corrupts block_sequence_steps,\ncausing a crash.\n\n[How]\nExpand block_sequence to 100 items. A naive upper bound on the possible\nnumber of steps for a 6-pipe asic, ignoring the potential for steps to be\nmutually exclusive, is 91 with current code, therefore 100 is sufficient."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "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"
          },
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            {
              "lang": "en",
              "value": "AV:L - The overflow is reached only through the local DRM atomic-commit/page-flip ioctl path on /dev/dri/cardN (amdgpu_dm_atomic_commit_tail \u2192 dc_update_planes_and_stream \u2192 commit_planes_for_stream_fast \u2192 hwss_build_fast_sequence). There is no network or adjacent-network exposure.\nAC:L - There is no bounds check whatsoever in hwss_build_fast_sequence, so an attacker who submits an atomic commit with many planes in one MPC chain and multiple simultaneous update flags (address, gamma, CTM/out_csc, gamut remap, bias/scale) deterministically drives the step count past 50 on the widely-deployed 6-pipe DCN2.0/DCN3.0 ASICs. No race, timing window, or attacker-uncontrollable state is involved.\nPR:L - Only an ordinary local user session is needed \u2014 logind grants the seat user rw access to /dev/dri/cardN and DRM master can be acquired on a free VT or by being the compositor, which is all the DRM_MASTER-gated atomic ioctl requires. No root or CAP_SYS_ADMIN is necessary.\nUI:N - The attacker issues the atomic commit itself; no action by another user or victim is required at any point in the path.\nS:U - The corruption is confined to kernel memory belonging to the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The first overflowing write clobbers block_sequence_steps with a kernel pointer, after which hwss_execute_sequence iterates an enormous count, reading out-of-bounds kernel memory as block_sequence entries and dereferencing OOB-derived pointers (mpc, pipe_ctx, csc regval) into display hardware programming \u2014 an out-of-bounds read/disclosure primitive, and the in-struct spill over kref refcount enables a dc_state use-after-free that can be leveraged for arbitrary read.\nI:H - This is an unbounded out-of-bounds write: entries 50+ overwrite block_sequence_steps, dc_dmub_cmd[], dmub_cmd_count and the kref refcount, and once the counter holds pointer-derived garbage every further write lands far outside the kvzalloc\u0027d dc_state, giving a wild kernel-heap write usable for control-flow hijacking.\nA:H - The commit message states outright that the overflow corrupts block_sequence_steps and causes a crash; the resulting wild writes and OOB function-pointer dispatch reliably produce a kernel oops/panic."
            }
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
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      "title": "drm/amd/display: Increase block_sequence array size",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38080",
    "datePublished": "2025-06-18T09:33:53.920Z",
    "dateReserved": "2025-04-16T04:51:23.980Z",
    "dateUpdated": "2026-08-05T11:59:19.178Z",
    "state": "PUBLISHED"
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  "vulnerability-lookup:meta": {
    "epss": {
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      "date": "2026-08-17",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38080\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-06-18T10:15:41.647\",\"lastModified\":\"2026-07-30T06:22:48.950\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/amd/display: Increase block_sequence array size\\n\\n[Why]\\nIt\u0027s possible to generate more than 50 steps in hwss_build_fast_sequence,\\nfor example with a 6-pipe asic where all pipes are in one MPC chain. This\\noverflows the block_sequence buffer and corrupts block_sequence_steps,\\ncausing a crash.\\n\\n[How]\\nExpand block_sequence to 100 items. A naive upper bound on the possible\\nnumber of steps for a 6-pipe asic, ignoring the potential for steps to be\\nmutually exclusive, is 91 with current code, therefore 100 is sufficient.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/amd/display: Aumentar el tama\u00f1o de la matriz block_sequence [Por qu\u00e9] Es posible generar m\u00e1s de 50 pasos en hwss_build_fast_sequence, por ejemplo, con un ASIC de 6 tuber\u00edas donde todas las tuber\u00edas est\u00e1n en una cadena MPC. Esto desborda el b\u00fafer block_sequence y corrompe block_sequence_steps, lo que provoca un fallo. [C\u00f3mo] Ampliar block_sequence a 100 elementos. Un l\u00edmite superior simple para el n\u00famero posible de pasos para un ASIC de 6 tuber\u00edas, ignorando la posibilidad de que los pasos sean mutuamente excluyentes, es 91 con el c\u00f3digo actual; por lo tanto, 100 es suficiente.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/gpu/drm/amd/display/dc/inc/core_types.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c\",\"lessThan\":\"de67e80ab48f1f23663831007a2fa3c1471a7757\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c\",\"lessThan\":\"e55c5704b12eeea27e212bfab8f7e51ad3e8ac1f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c\",\"lessThan\":\"bf1666072e7482317cf2302621766482a21a62c7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c\",\"lessThan\":\"3a7810c212bcf2f722671dadf4b23ff70a7d23ee\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/gpu/drm/amd/display/dc/inc/core_types.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.15\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.15\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.93\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.31\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.14.9\",\"lessThanOrEqual\":\"6.14.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.15\",\"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\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.15\",\"versionEndExcluding\":\"6.6.93\",\"matchCriteriaId\":\"CE0D2A5C-54AB-4F39-8991-7AC94FB5B780\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.31\",\"matchCriteriaId\":\"1AE98841-5774-4B45-A81C-2D188DB7E5C3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.14.9\",\"matchCriteriaId\":\"A9B72DD1-715C-4101-A720-1C8D70044C06\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3a7810c212bcf2f722671dadf4b23ff70a7d23ee\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/bf1666072e7482317cf2302621766482a21a62c7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/de67e80ab48f1f23663831007a2fa3c1471a7757\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e55c5704b12eeea27e212bfab8f7e51ad3e8ac1f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:32:08+00:00",
      "cve": "CVE-2025-38080",
      "id": "CVE-2025-38080",
      "initial_release_date": "2025-06-18T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/amd/display: Increase block_sequence array size",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38080.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-25T00:51:54Z",
      "cve": "CVE-2025-38080",
      "id": "CVE-2025-38080",
      "initial_release_date": "2025-06-19T03:13:59Z",
      "product_status:known_affected": "394",
      "product_status:known_not_affected": "308",
      "product_status:recommended": "407",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-38080",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-38080.json",
      "version": "36"
    }
  }
}



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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.