Vulnerability-Lookup

GHSA-R3Q8-XM3R-6V78

Vulnerability from github – Published: 2026-05-08 15:31 – Updated: 2026-05-11 09:30

Details

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

net: nfc: nci: Fix parameter validation for packet data

Since commit 9c328f54741b ("net: nfc: nci: Add parameter validation for packet data") communication with nci nfc chips is not working any more.

The mentioned commit tries to fix access of uninitialized data, but failed to understand that in some cases the data packet is of variable length and can therefore not be compared to the maximum packet length given by the sizeof(struct).

Severity

8.3 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-43291"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-908"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-08T14:16:36Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: nfc: nci: Fix parameter validation for packet data\n\nSince commit 9c328f54741b (\"net: nfc: nci: Add parameter validation for\npacket data\") communication with nci nfc chips is not working any more.\n\nThe mentioned commit tries to fix access of uninitialized data, but\nfailed to understand that in some cases the data packet is of variable\nlength and can therefore not be compared to the maximum packet length\ngiven by the sizeof(struct).",
  "id": "GHSA-r3q8-xm3r-6v78",
  "modified": "2026-05-11T09:30:29Z",
  "published": "2026-05-08T15:31:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43291"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3b91160e9a91b5a2662875417dc42dc5b0bf03ea"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/498fc5d0d650c77e87fcc73808d4f43240c21805"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/571dcbeb8e635182bb825ae758399831805693c2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a24a8a582da4426b2042e510a1080df84083b51d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ad058a4317db7fdb3f09caa6ed536d24a62ce6a0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c692db813a7e3b7c3c17d6e9a3ad2a018bf1142b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f5218426f765eee22e178df9c126d974792fb6a5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-43291 (GCVE-0-2026-43291)

Vulnerability from cvelistv5 – Published: 2026-05-08 13:11 – Updated: 2026-08-05 12:27

Title

net: nfc: nci: Fix parameter validation for packet data

Summary

In the Linux kernel, the following vulnerability has been resolved: net: nfc: nci: Fix parameter validation for packet data Since commit 9c328f54741b ("net: nfc: nci: Add parameter validation for packet data") communication with nci nfc chips is not working any more. The mentioned commit tries to fix access of uninitialized data, but failed to understand that in some cases the data packet is of variable length and can therefore not be compared to the maximum packet length given by the sizeof(struct).

Severity

8.3 (High)


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

Assigner

Linux CNA under the mitre root

CNA scorecard D 54/100 over 6618 records in the last 180 days details

References

7 references

URL	Tags
https://git.kernel.org/stable/c/a24a8a582da4426b2…
https://git.kernel.org/stable/c/f5218426f765eee22…
https://git.kernel.org/stable/c/ad058a4317db7fdb3…
https://git.kernel.org/stable/c/3b91160e9a91b5a26…
https://git.kernel.org/stable/c/c692db813a7e3b7c3…
https://git.kernel.org/stable/c/498fc5d0d650c77e8…
https://git.kernel.org/stable/c/571dcbeb8e635182b…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 8fcc7315a10a84264e55bb65ede10f0af20a983f , < a24a8a582da4426b2042e510a1080df84083b51d (git) Affected: bfdda0123dde406dbff62e7e9136037e97998a15 , < f5218426f765eee22e178df9c126d974792fb6a5 (git) Affected: 0ba68bea1e356f466ad29449938bea12f5f3711f , < ad058a4317db7fdb3f09caa6ed536d24a62ce6a0 (git) Affected: 74837bca0748763a77f77db47a0bdbe63b347628 , < 3b91160e9a91b5a2662875417dc42dc5b0bf03ea (git) Affected: 9c328f54741bd5465ca1dc717c84c04242fac2e1 , < c692db813a7e3b7c3c17d6e9a3ad2a018bf1142b (git) Affected: 9c328f54741bd5465ca1dc717c84c04242fac2e1 , < 498fc5d0d650c77e87fcc73808d4f43240c21805 (git) Affected: 9c328f54741bd5465ca1dc717c84c04242fac2e1 , < 571dcbeb8e635182bb825ae758399831805693c2 (git) Affected: c395d1e548cc68e84584ffa2e3ca9796a78bf7b9 (git) Affected: 5.15.195 , < 5.15.202 (semver) Affected: 6.1.156 , < 6.1.165 (semver) Affected: 6.6.112 , < 6.6.128 (semver) Affected: 6.12.53 , < 6.12.75 (semver) Affected: 6.17.3 , < 6.18 (semver)
Linux	Linux	Affected: 6.18 Unaffected: 0 , < 6.18 (semver) Unaffected: 5.15.202 , ≤ 5.15.* (semver) Unaffected: 6.1.165 , ≤ 6.1.* (semver) Unaffected: 6.6.128 , ≤ 6.6.* (semver) Unaffected: 6.12.75 , ≤ 6.12.* (semver) Unaffected: 6.18.16 , ≤ 6.18.* (semver) Unaffected: 6.19.6 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/nfc/nci/ntf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a24a8a582da4426b2042e510a1080df84083b51d",
              "status": "affected",
              "version": "8fcc7315a10a84264e55bb65ede10f0af20a983f",
              "versionType": "git"
            },
            {
              "lessThan": "f5218426f765eee22e178df9c126d974792fb6a5",
              "status": "affected",
              "version": "bfdda0123dde406dbff62e7e9136037e97998a15",
              "versionType": "git"
            },
            {
              "lessThan": "ad058a4317db7fdb3f09caa6ed536d24a62ce6a0",
              "status": "affected",
              "version": "0ba68bea1e356f466ad29449938bea12f5f3711f",
              "versionType": "git"
            },
            {
              "lessThan": "3b91160e9a91b5a2662875417dc42dc5b0bf03ea",
              "status": "affected",
              "version": "74837bca0748763a77f77db47a0bdbe63b347628",
              "versionType": "git"
            },
            {
              "lessThan": "c692db813a7e3b7c3c17d6e9a3ad2a018bf1142b",
              "status": "affected",
              "version": "9c328f54741bd5465ca1dc717c84c04242fac2e1",
              "versionType": "git"
            },
            {
              "lessThan": "498fc5d0d650c77e87fcc73808d4f43240c21805",
              "status": "affected",
              "version": "9c328f54741bd5465ca1dc717c84c04242fac2e1",
              "versionType": "git"
            },
            {
              "lessThan": "571dcbeb8e635182bb825ae758399831805693c2",
              "status": "affected",
              "version": "9c328f54741bd5465ca1dc717c84c04242fac2e1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c395d1e548cc68e84584ffa2e3ca9796a78bf7b9",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "5.15.195",
              "versionType": "semver"
            },
            {
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              "status": "affected",
              "version": "6.1.156",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.128",
              "status": "affected",
              "version": "6.6.112",
              "versionType": "semver"
            },
            {
              "lessThan": "6.12.75",
              "status": "affected",
              "version": "6.12.53",
              "versionType": "semver"
            },
            {
              "lessThan": "6.18",
              "status": "affected",
              "version": "6.17.3",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/nfc/nci/ntf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.18"
            },
            {
              "lessThan": "6.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.202",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.165",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.128",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.202",
                  "versionStartIncluding": "5.15.195",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.165",
                  "versionStartIncluding": "6.1.156",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.128",
                  "versionStartIncluding": "6.6.112",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.75",
                  "versionStartIncluding": "6.12.53",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.16",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.6",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.17.3",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: nfc: nci: Fix parameter validation for packet data\n\nSince commit 9c328f54741b (\"net: nfc: nci: Add parameter validation for\npacket data\") communication with nci nfc chips is not working any more.\n\nThe mentioned commit tries to fix access of uninitialized data, but\nfailed to understand that in some cases the data packet is of variable\nlength and can therefore not be compared to the maximum packet length\ngiven by the sizeof(struct)."
        }
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H",
            "version": "3.1"
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              "value": "AV:A - An attacker in NFC proximity can plausibly trigger RF discovery or activation notifications through crafted NFC tag/peer responses that are converted by the NFCC into NCI notification payloads parsed by this code. This is not internet-routable, but it is reachable over short-range adjacent NFC communication.\nAC:L - The vulnerable parsing is deterministic once a malformed or truncated NCI notification is delivered, and there is no race or hard-to-control timing dependency. The attacker-controlled packet lengths and fields drive the out-of-bounds/uninitialized reads directly.\nPR:N - The adjacent NFC attacker needs no privileges on the victim system to present a crafted NFC peer/tag to an active reader/listener. Local administrative controls are needed to configure NFC polling, but they are not privileges required by the RF-side attacker.\nUI:N - In a reasonable high-impact deployment such as a kiosk, phone, or controller with NFC polling/listen mode active, the attacker only needs to bring the crafted NFC device into range. No victim user action is required at exploitation time.\nS:U - The impact remains within the same kernel/host security authority. There is no VM escape, IOMMU bypass, or cross-authority boundary change.\nC:H - The bug is an out-of-bounds/uninitialized read from skb-backed packet data, confirmed by the syzbot KMSAN report and addressed by added per-field bounds checks. Under the kernel scoring guidance, out-of-bounds reads are High confidentiality impact unless strictly bounded to a few bytes.\nI:L - The investigation did not show an out-of-bounds write or direct control-flow corruption primitive. However, malformed parsed data can still corrupt NFC subsystem state such as targets, activation data, and connection credits, so limited integrity impact is defensible.\nA:H - Malformed notifications can trigger kernel sanitizer reports, warnings, or crashes from invalid/uninitialized packet accesses. The packet path can be exercised repeatedly, making denial of service high impact."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:27:06.691Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/571dcbeb8e635182bb825ae758399831805693c2"
        }
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      "title": "net: nfc: nci: Fix parameter validation for packet data",
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        "engine": "bippy-1.2.0"
      }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43291",
    "datePublished": "2026-05-08T13:11:15.312Z",
    "dateReserved": "2026-05-01T14:12:55.999Z",
    "dateUpdated": "2026-08-05T12:27:06.691Z",
    "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.

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-R3Q8-XM3R-6V78

CVE-2026-43291 (GCVE-0-2026-43291)

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