Vulnerability-Lookup

FKIE_CVE-2026-64446

Vulnerability from fkie_nvd - Published: 2026-07-25 10:17 - Updated: 2026-09-03 15:38

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix heap buffer overflow in rtw_cfg80211_set_wpa_ie() supplicant_ie is a 256-byte array in struct security_priv. The WPA and WPA2 IE copy paths use: memcpy(padapter->securitypriv.supplicant_ie, &pwpa[0], wpa_ielen + 2); where wpa_ielen is the raw IE length field (u8, 0-255). When a local user supplies a connect request via nl80211 with a crafted WPA IE of length 255, wpa_ielen + 2 equals 257, overflowing the 256-byte buffer by one byte into the adjacent last_mic_err_time field. rtw_parse_wpa_ie() does not prevent this: its length consistency check compares *(wpa_ie+1) against (u8)(wpa_ie_len-2), which is (u8)(255) == 255 when wpa_ie_len = 257, so the check passes silently. Add explicit bounds checks for both the WPA and WPA2 paths before the memcpy, rejecting any IE whose total size (wpa_ielen + 2) exceeds the supplicant_ie buffer.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/138cd190efd56ab36c9fdd8fef8749d06937f24b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2131621986c62c86109ce4d84cf73a73757eb8a6	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/46f66c16a95191d9aca07a72ae6b1252a244e26c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5a752a616e756844388a1a45404db9fc29fec655	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5d7812360abf3143afcbf5efe4ef242448fa1f28	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6f20d7b0ee47c470734a69379b0fc6647c519603	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a94a643a80a84ceb8139061c3d6bf988d75e45a5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b9c4bf133c3c47e23baf4f5403b98a953bf58606	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	7.2
linux	linux_kernel	7.2

JSON

To clipboard

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            "drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c"
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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix heap buffer overflow in rtw_cfg80211_set_wpa_ie()\n\nsupplicant_ie is a 256-byte array in struct security_priv. The WPA and\nWPA2 IE copy paths use:\n\n    memcpy(padapter-\u003esecuritypriv.supplicant_ie, \u0026pwpa[0], wpa_ielen + 2);\n\nwhere wpa_ielen is the raw IE length field (u8, 0-255). When a local user\nsupplies a connect request via nl80211 with a crafted WPA IE of length 255,\nwpa_ielen + 2 equals 257, overflowing the 256-byte buffer by one byte into\nthe adjacent last_mic_err_time field.\n\nrtw_parse_wpa_ie() does not prevent this: its length consistency check\ncompares *(wpa_ie+1) against (u8)(wpa_ie_len-2), which is (u8)(255) == 255\nwhen wpa_ie_len = 257, so the check passes silently.\n\nAdd explicit bounds checks for both the WPA and WPA2 paths before the\nmemcpy, rejecting any IE whose total size (wpa_ielen + 2) exceeds the\nsupplicant_ie buffer."
    }
  ],
  "id": "CVE-2026-64446",
  "lastModified": "2026-09-03T15:38:01.857",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "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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        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2026-07-25T10:17:29.310",
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      "source": "nvd@nist.gov",
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}

CVE-2026-64446 (GCVE-0-2026-64446)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55

Title

staging: rtl8723bs: fix heap buffer overflow in rtw_cfg80211_set_wpa_ie()

Summary

Severity

No CVSS data available.

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/a94a643a80a84ceb8…
https://git.kernel.org/stable/c/2131621986c62c861…
https://git.kernel.org/stable/c/6f20d7b0ee47c4707…
https://git.kernel.org/stable/c/5d7812360abf3143a…
https://git.kernel.org/stable/c/46f66c16a95191d9a…
https://git.kernel.org/stable/c/b9c4bf133c3c47e23…
https://git.kernel.org/stable/c/138cd190efd56ab36…
https://git.kernel.org/stable/c/5a752a616e7568443…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < a94a643a80a84ceb8139061c3d6bf988d75e45a5 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 2131621986c62c86109ce4d84cf73a73757eb8a6 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 6f20d7b0ee47c470734a69379b0fc6647c519603 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 5d7812360abf3143afcbf5efe4ef242448fa1f28 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 46f66c16a95191d9aca07a72ae6b1252a244e26c (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < b9c4bf133c3c47e23baf4f5403b98a953bf58606 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 138cd190efd56ab36c9fdd8fef8749d06937f24b (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 5a752a616e756844388a1a45404db9fc29fec655 (git)
Linux	Linux	Affected: 4.12 Unaffected: 0 , < 4.12 (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: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.96",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.39",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.4",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix heap buffer overflow in rtw_cfg80211_set_wpa_ie()\n\nsupplicant_ie is a 256-byte array in struct security_priv. The WPA and\nWPA2 IE copy paths use:\n\n    memcpy(padapter-\u003esecuritypriv.supplicant_ie, \u0026pwpa[0], wpa_ielen + 2);\n\nwhere wpa_ielen is the raw IE length field (u8, 0-255). When a local user\nsupplies a connect request via nl80211 with a crafted WPA IE of length 255,\nwpa_ielen + 2 equals 257, overflowing the 256-byte buffer by one byte into\nthe adjacent last_mic_err_time field.\n\nrtw_parse_wpa_ie() does not prevent this: its length consistency check\ncompares *(wpa_ie+1) against (u8)(wpa_ie_len-2), which is (u8)(255) == 255\nwhen wpa_ie_len = 257, so the check passes silently.\n\nAdd explicit bounds checks for both the WPA and WPA2 paths before the\nmemcpy, rejecting any IE whose total size (wpa_ielen + 2) exceeds the\nsupplicant_ie buffer."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T04:55:48.878Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a94a643a80a84ceb8139061c3d6bf988d75e45a5"
        },
        {
          "url": "https://git.kernel.org/stable/c/2131621986c62c86109ce4d84cf73a73757eb8a6"
        },
        {
          "url": "https://git.kernel.org/stable/c/6f20d7b0ee47c470734a69379b0fc6647c519603"
        },
        {
          "url": "https://git.kernel.org/stable/c/5d7812360abf3143afcbf5efe4ef242448fa1f28"
        },
        {
          "url": "https://git.kernel.org/stable/c/46f66c16a95191d9aca07a72ae6b1252a244e26c"
        },
        {
          "url": "https://git.kernel.org/stable/c/b9c4bf133c3c47e23baf4f5403b98a953bf58606"
        },
        {
          "url": "https://git.kernel.org/stable/c/138cd190efd56ab36c9fdd8fef8749d06937f24b"
        },
        {
          "url": "https://git.kernel.org/stable/c/5a752a616e756844388a1a45404db9fc29fec655"
        }
      ],
      "title": "staging: rtl8723bs: fix heap buffer overflow in rtw_cfg80211_set_wpa_ie()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64446",
    "datePublished": "2026-07-25T08:51:17.402Z",
    "dateReserved": "2026-07-19T15:36:31.788Z",
    "dateUpdated": "2026-08-17T04:55:48.878Z",
    "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

FKIE_CVE-2026-64446

CVE-2026-64446 (GCVE-0-2026-64446)

Tags

Sightings

Nomenclature