Vulnerability-Lookup

GHSA-F4RX-VF72-PG97

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-17 06:33

Details

In the Linux kernel, the following vulnerability has been resolved:

accel/ivpu: Reject firmware log with size smaller than header

fw_log_from_bo() validates the tracing buffer header_size and that the log fits within the BO, but never checks that log->size is at least log->header_size. fw_log_print_buffer() then computes:

u32 data_size = log->size - log->header_size;

which underflows to a near-U32_MAX value when firmware reports a log whose size is smaller than its header. That huge data_size defeats the log_start/log_end bounds clamps added by commit dd1311bcf0e6 ("accel/ivpu: Add bounds checks for firmware log indices"), so fw_log_print_lines() reads far past the small real data region of the BO. A size of 0 also makes fw_log_from_bo() advance the offset by 0, causing the callers to loop forever on the same header.

Reject logs whose size is smaller than the header (which also rejects size == 0).

Severity

7.1 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72089"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:21:22Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/ivpu: Reject firmware log with size smaller than header\n\nfw_log_from_bo() validates the tracing buffer header_size and that the\nlog fits within the BO, but never checks that log-\u003esize is at least\nlog-\u003eheader_size. fw_log_print_buffer() then computes:\n\n  u32 data_size = log-\u003esize - log-\u003eheader_size;\n\nwhich underflows to a near-U32_MAX value when firmware reports a log whose\nsize is smaller than its header. That huge data_size defeats the\nlog_start/log_end bounds clamps added by commit dd1311bcf0e6 (\"accel/ivpu:\nAdd bounds checks for firmware log indices\"), so fw_log_print_lines() reads\nfar past the small real data region of the BO. A size of 0 also makes\nfw_log_from_bo() advance the offset by 0, causing the callers to loop\nforever on the same header.\n\nReject logs whose size is smaller than the header (which also rejects\nsize == 0).",
  "id": "GHSA-f4rx-vf72-pg97",
  "modified": "2026-08-17T06:33:09Z",
  "published": "2026-08-15T06:32:11Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72089"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/257321a1c036da417f5d9c47b95c7e58f62bf263"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5592a207e158b738d9c1d27f208dbbea13ae7606"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6920e62be4c969a68ce4ebc59da68c6cbc9512e5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dc9a1cda2e46d0254730a6f93cfe48532895f33c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ddb44baed257560f192b145ed36cf8c0a412de47"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-72089 (GCVE-0-2026-72089)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:52 – Updated: 2026-08-17 05:40

Title

accel/ivpu: Reject firmware log with size smaller than header

Summary

In the Linux kernel, the following vulnerability has been resolved: accel/ivpu: Reject firmware log with size smaller than header fw_log_from_bo() validates the tracing buffer header_size and that the log fits within the BO, but never checks that log->size is at least log->header_size. fw_log_print_buffer() then computes: u32 data_size = log->size - log->header_size; which underflows to a near-U32_MAX value when firmware reports a log whose size is smaller than its header. That huge data_size defeats the log_start/log_end bounds clamps added by commit dd1311bcf0e6 ("accel/ivpu: Add bounds checks for firmware log indices"), so fw_log_print_lines() reads far past the small real data region of the BO. A size of 0 also makes fw_log_from_bo() advance the offset by 0, causing the callers to loop forever on the same header. Reject logs whose size is smaller than the header (which also rejects size == 0).

Severity

7.1 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Assigner

Linux mitre root

References

5 references

URL	Tags
https://git.kernel.org/stable/c/5592a207e158b738d…
https://git.kernel.org/stable/c/dc9a1cda2e46d0254…
https://git.kernel.org/stable/c/257321a1c036da417…
https://git.kernel.org/stable/c/6920e62be4c969a68…
https://git.kernel.org/stable/c/ddb44baed257560f1…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: d4e4257afa6ed5205eda993180401fc2c20e4b60 , < 5592a207e158b738d9c1d27f208dbbea13ae7606 (git) Affected: d4e4257afa6ed5205eda993180401fc2c20e4b60 , < dc9a1cda2e46d0254730a6f93cfe48532895f33c (git) Affected: d4e4257afa6ed5205eda993180401fc2c20e4b60 , < 257321a1c036da417f5d9c47b95c7e58f62bf263 (git) Affected: d4e4257afa6ed5205eda993180401fc2c20e4b60 , < 6920e62be4c969a68ce4ebc59da68c6cbc9512e5 (git) Affected: d4e4257afa6ed5205eda993180401fc2c20e4b60 , < ddb44baed257560f192b145ed36cf8c0a412de47 (git)
Linux	Linux	Affected: 6.6 Unaffected: 0 , < 6.6 (semver) Unaffected: 6.6.148 , ≤ 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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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/accel/ivpu/ivpu_fw_log.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5592a207e158b738d9c1d27f208dbbea13ae7606",
              "status": "affected",
              "version": "d4e4257afa6ed5205eda993180401fc2c20e4b60",
              "versionType": "git"
            },
            {
              "lessThan": "dc9a1cda2e46d0254730a6f93cfe48532895f33c",
              "status": "affected",
              "version": "d4e4257afa6ed5205eda993180401fc2c20e4b60",
              "versionType": "git"
            },
            {
              "lessThan": "257321a1c036da417f5d9c47b95c7e58f62bf263",
              "status": "affected",
              "version": "d4e4257afa6ed5205eda993180401fc2c20e4b60",
              "versionType": "git"
            },
            {
              "lessThan": "6920e62be4c969a68ce4ebc59da68c6cbc9512e5",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "ddb44baed257560f192b145ed36cf8c0a412de47",
              "status": "affected",
              "version": "d4e4257afa6ed5205eda993180401fc2c20e4b60",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/accel/ivpu/ivpu_fw_log.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "version": "6.6"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "versionType": "semver"
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              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.148",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.40",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/ivpu: Reject firmware log with size smaller than header\n\nfw_log_from_bo() validates the tracing buffer header_size and that the\nlog fits within the BO, but never checks that log-\u003esize is at least\nlog-\u003eheader_size. fw_log_print_buffer() then computes:\n\n  u32 data_size = log-\u003esize - log-\u003eheader_size;\n\nwhich underflows to a near-U32_MAX value when firmware reports a log whose\nsize is smaller than its header. That huge data_size defeats the\nlog_start/log_end bounds clamps added by commit dd1311bcf0e6 (\"accel/ivpu:\nAdd bounds checks for firmware log indices\"), so fw_log_print_lines() reads\nfar past the small real data region of the BO. A size of 0 also makes\nfw_log_from_bo() advance the offset by 0, causing the callers to loop\nforever on the same header.\n\nReject logs whose size is smaller than the header (which also rejects\nsize == 0)."
        }
      ],
      "metrics": [
        {
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            "baseScore": 7.1,
            "baseSeverity": "HIGH",
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            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is in Intel NPU (ivpu) firmware log parsing reached only via local debugfs reads/writes or automatic driver recovery/coredump paths after submitting work through the DRM render node; there is no network-facing entry point.\nAC:L - An unprivileged local user can repeatedly submit NPU jobs to provoke firmware faults/timeouts that leave malformed tracing headers and then reliably trigger kernel log parsing during recovery, coredump, or fw_log access without depending on uncontrollable timing or layout.\nPR:L - Exploitation requires only standard local access to the Intel NPU DRM render node to submit inference jobs and provoke recovery; it does not require root/CAP_SYS_ADMIN, and the device is not reachable from unprivileged user namespaces.\nUI:N - No victim interaction is required; the attacker triggers malformed firmware log processing themselves via job submission and the resulting automatic recovery/coredump path or by reading debugfs fw_log.\nS:U - Impact is confined to kernel memory and availability on the same host running the ivpu driver; it does not cross VM, container, or IOMMU security boundaries.\nC:H - Integer underflow makes data_size wrap to ~U32_MAX, bypassing index clamps so fw_log_print_lines performs a massive out-of-bounds read past the tracing BO and can disclose adjacent kernel memory via drm_printf/coredump output.\nI:N - The flaw is an out-of-bounds read and possible infinite loop during parsing; it does not provide an arbitrary kernel write, code execution, or other integrity-modifying primitive.\nA:H - A near-U32_MAX read can oops/panic the kernel when accessing unmapped memory, and log size 0 prevents offset advancement causing an infinite loop in fw_log_print_all_in_bo during coredump, reset, or debugfs access, hanging the system."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:40:09.108Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        },
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        },
        {
          "url": "https://git.kernel.org/stable/c/ddb44baed257560f192b145ed36cf8c0a412de47"
        }
      ],
      "title": "accel/ivpu: Reject firmware log with size smaller than header",
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        "engine": "bippy-1.2.0"
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72089",
    "datePublished": "2026-08-15T05:52:36.800Z",
    "dateReserved": "2026-08-09T03:40:39.905Z",
    "dateUpdated": "2026-08-17T05:40:09.108Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

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GHSA-F4RX-VF72-PG97

CVE-2026-72089 (GCVE-0-2026-72089)

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Sightings

Nomenclature