Vulnerability-Lookup

GHSA-2V2R-3JF8-MFGG

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:

staging: nvec: fix use-after-free in nvec_rx_completed()

In nvec_rx_completed(), when an incomplete RX transfer is detected, nvec_msg_free() is called to return the message back to the pool by clearing its 'used' atomic flag. Immediately after this, the code accesses nvec->rx->data[0] to check the message type.

Since nvec_msg_free() marks the pool slot as available via atomic_set(), any concurrent or subsequent call to nvec_msg_alloc() could claim that same slot and overwrite its data[] array. Reading nvec->rx->data[0] after freeing the message is therefore a use-after-free.

Fix this by saving the message type byte before calling nvec_msg_free(), then using the saved value for the battery quirk check.

Severity

8.4 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72489"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:22:23Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: nvec: fix use-after-free in nvec_rx_completed()\n\nIn nvec_rx_completed(), when an incomplete RX transfer is detected,\nnvec_msg_free() is called to return the message back to the pool by\nclearing its \u0027used\u0027 atomic flag. Immediately after this, the code\naccesses nvec-\u003erx-\u003edata[0] to check the message type.\n\nSince nvec_msg_free() marks the pool slot as available via atomic_set(),\nany concurrent or subsequent call to nvec_msg_alloc() could claim that\nsame slot and overwrite its data[] array. Reading nvec-\u003erx-\u003edata[0] after\nfreeing the message is therefore a use-after-free.\n\nFix this by saving the message type byte before calling nvec_msg_free(),\nthen using the saved value for the battery quirk check.",
  "id": "GHSA-2v2r-3jf8-mfgg",
  "modified": "2026-08-17T06:33:33Z",
  "published": "2026-08-15T06:32:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72489"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/08626fcfe12308ca3f8b22c538ba7dee0b2dce7a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/26813881181deb3a32fbb59eadb2599cbe8423f6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5de04caa46b635e180cecbd164e333eca535db94"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6b2ea886ebdae44a2394029844a4e78f58e1587d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9f7fe4165a1f1014bdadc8e744c0fd3c2d8c0b89"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a37625c7b688fcf68a54263528eccbabfd7fa17a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bb3d592c7d6c4ec8ac6640c690ca13298e7e8e90"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f19a5bc059051143c489dd6f79a0f9c3bfd13aea"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-72489 (GCVE-0-2026-72489)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:57 – Updated: 2026-08-17 05:44

Title

staging: nvec: fix use-after-free in nvec_rx_completed()

Summary

In the Linux kernel, the following vulnerability has been resolved: staging: nvec: fix use-after-free in nvec_rx_completed() In nvec_rx_completed(), when an incomplete RX transfer is detected, nvec_msg_free() is called to return the message back to the pool by clearing its 'used' atomic flag. Immediately after this, the code accesses nvec->rx->data[0] to check the message type. Since nvec_msg_free() marks the pool slot as available via atomic_set(), any concurrent or subsequent call to nvec_msg_alloc() could claim that same slot and overwrite its data[] array. Reading nvec->rx->data[0] after freeing the message is therefore a use-after-free. Fix this by saving the message type byte before calling nvec_msg_free(), then using the saved value for the battery quirk check.

Severity

8.4 (High)


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

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/6b2ea886ebdae44a2…
https://git.kernel.org/stable/c/a37625c7b688fcf68…
https://git.kernel.org/stable/c/9f7fe4165a1f1014b…
https://git.kernel.org/stable/c/08626fcfe12308ca3…
https://git.kernel.org/stable/c/f19a5bc059051143c…
https://git.kernel.org/stable/c/bb3d592c7d6c4ec8a…
https://git.kernel.org/stable/c/5de04caa46b635e18…
https://git.kernel.org/stable/c/26813881181deb3a3…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: d6bdcf2e1019351cbc176e963b7756766bdd8721 , < 6b2ea886ebdae44a2394029844a4e78f58e1587d (git) Affected: d6bdcf2e1019351cbc176e963b7756766bdd8721 , < a37625c7b688fcf68a54263528eccbabfd7fa17a (git) Affected: d6bdcf2e1019351cbc176e963b7756766bdd8721 , < 9f7fe4165a1f1014bdadc8e744c0fd3c2d8c0b89 (git) Affected: d6bdcf2e1019351cbc176e963b7756766bdd8721 , < 08626fcfe12308ca3f8b22c538ba7dee0b2dce7a (git) Affected: d6bdcf2e1019351cbc176e963b7756766bdd8721 , < f19a5bc059051143c489dd6f79a0f9c3bfd13aea (git) Affected: d6bdcf2e1019351cbc176e963b7756766bdd8721 , < bb3d592c7d6c4ec8ac6640c690ca13298e7e8e90 (git) Affected: d6bdcf2e1019351cbc176e963b7756766bdd8721 , < 5de04caa46b635e180cecbd164e333eca535db94 (git) Affected: d6bdcf2e1019351cbc176e963b7756766bdd8721 , < 26813881181deb3a32fbb59eadb2599cbe8423f6 (git)
Linux	Linux	Affected: 3.2 Unaffected: 0 , < 3.2 (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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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/staging/nvec/nvec.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6b2ea886ebdae44a2394029844a4e78f58e1587d",
              "status": "affected",
              "version": "d6bdcf2e1019351cbc176e963b7756766bdd8721",
              "versionType": "git"
            },
            {
              "lessThan": "a37625c7b688fcf68a54263528eccbabfd7fa17a",
              "status": "affected",
              "version": "d6bdcf2e1019351cbc176e963b7756766bdd8721",
              "versionType": "git"
            },
            {
              "lessThan": "9f7fe4165a1f1014bdadc8e744c0fd3c2d8c0b89",
              "status": "affected",
              "version": "d6bdcf2e1019351cbc176e963b7756766bdd8721",
              "versionType": "git"
            },
            {
              "lessThan": "08626fcfe12308ca3f8b22c538ba7dee0b2dce7a",
              "status": "affected",
              "version": "d6bdcf2e1019351cbc176e963b7756766bdd8721",
              "versionType": "git"
            },
            {
              "lessThan": "f19a5bc059051143c489dd6f79a0f9c3bfd13aea",
              "status": "affected",
              "version": "d6bdcf2e1019351cbc176e963b7756766bdd8721",
              "versionType": "git"
            },
            {
              "lessThan": "bb3d592c7d6c4ec8ac6640c690ca13298e7e8e90",
              "status": "affected",
              "version": "d6bdcf2e1019351cbc176e963b7756766bdd8721",
              "versionType": "git"
            },
            {
              "lessThan": "5de04caa46b635e180cecbd164e333eca535db94",
              "status": "affected",
              "version": "d6bdcf2e1019351cbc176e963b7756766bdd8721",
              "versionType": "git"
            },
            {
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              "version": "d6bdcf2e1019351cbc176e963b7756766bdd8721",
              "versionType": "git"
            }
          ]
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          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/staging/nvec/nvec.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.2"
            },
            {
              "lessThan": "3.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "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": "5.10.261",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.212",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.178",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.145",
                  "versionStartIncluding": "3.2",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "3.2",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.40",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: nvec: fix use-after-free in nvec_rx_completed()\n\nIn nvec_rx_completed(), when an incomplete RX transfer is detected,\nnvec_msg_free() is called to return the message back to the pool by\nclearing its \u0027used\u0027 atomic flag. Immediately after this, the code\naccesses nvec-\u003erx-\u003edata[0] to check the message type.\n\nSince nvec_msg_free() marks the pool slot as available via atomic_set(),\nany concurrent or subsequent call to nvec_msg_alloc() could claim that\nsame slot and overwrite its data[] array. Reading nvec-\u003erx-\u003edata[0] after\nfreeing the message is therefore a use-after-free.\n\nFix this by saving the message type byte before calling nvec_msg_free(),\nthen using the saved value for the battery quirk check."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.4,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The flaw is hit in the I2C slave IRQ handler when the embedded controller ends an RX transfer early; on affected Tegra20 PAZ00 netbooks a local actor can reach it by stressing EC traffic via kernel battery polling and userspace sysfs/input subdrivers (LED, keyboard) that call nvec_write_async().\nAC:L - This is a use-after-free where nvec_msg_free() returns the RX pool slot and the handler immediately re-reads nvec-\u003erx-\u003edata[0]; on SMP an attacker can provoke incomplete NVEC_BAT responses while concurrent I2C IRQs call nvec_msg_alloc(), controlling both sides of the slot-reuse race.\nPR:N - No elevated privileges are needed because the nvec-power delayed worker automatically issues NVEC_BAT requests every five seconds at boot, and documented incomplete EC battery responses can reach the vulnerable IRQ path before any user authentication or special capabilities.\nUI:N - Exploitation does not require victim interaction; kernel background battery and AC polling plus EC-initiated incomplete transfers can invoke nvec_rx_completed() without the user mounting filesystems, opening files, or performing other deliberate actions.\nS:U - Impact is confined to kernel memory and privileges on the same Tegra SoC running the driver; this is not a VM escape, hypervisor breakout, or other cross-security-authority boundary violation.\nC:H - Reading nvec-\u003erx-\u003edata[0] after nvec_msg_free() is a use-after-free on a msg_pool slot where concurrent nvec_msg_alloc() can overwrite data[], yielding attacker-influenced kernel memory reads and potential disclosure of pointers or adjacent structure contents.\nI:H - Use-after-free on reusable nvec_msg pool entries can be leveraged for controlled reuse of freed message buffers, enabling heap-style corruption primitives that may lead to arbitrary kernel memory writes and privilege escalation or code execution.\nA:H - The post-free read can mis-handle ec_transfer completion and corrupt IRQ-time state; use-after-free in hardirq context can kernel oops or panic the system, consistent with the original battery-quirk crash this code path was introduced to mitigate."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:44:51.131Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6b2ea886ebdae44a2394029844a4e78f58e1587d"
        },
        {
          "url": "https://git.kernel.org/stable/c/a37625c7b688fcf68a54263528eccbabfd7fa17a"
        },
        {
          "url": "https://git.kernel.org/stable/c/9f7fe4165a1f1014bdadc8e744c0fd3c2d8c0b89"
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        {
          "url": "https://git.kernel.org/stable/c/08626fcfe12308ca3f8b22c538ba7dee0b2dce7a"
        },
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          "url": "https://git.kernel.org/stable/c/f19a5bc059051143c489dd6f79a0f9c3bfd13aea"
        },
        {
          "url": "https://git.kernel.org/stable/c/bb3d592c7d6c4ec8ac6640c690ca13298e7e8e90"
        },
        {
          "url": "https://git.kernel.org/stable/c/5de04caa46b635e180cecbd164e333eca535db94"
        },
        {
          "url": "https://git.kernel.org/stable/c/26813881181deb3a32fbb59eadb2599cbe8423f6"
        }
      ],
      "title": "staging: nvec: fix use-after-free in nvec_rx_completed()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72489",
    "datePublished": "2026-08-15T05:57:24.948Z",
    "dateReserved": "2026-08-09T03:40:39.936Z",
    "dateUpdated": "2026-08-17T05:44:51.131Z",
    "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.

Action not permitted

GHSA-2V2R-3JF8-MFGG

CVE-2026-72489 (GCVE-0-2026-72489)

Tags

Sightings

Nomenclature