CVE-2026-64443 (GCVE-0-2026-64443)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:55
VLAI
Title
staging: rtl8723bs: fix OOB read in update_beacon_info() IE loop
Summary
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB read in update_beacon_info() IE loop The IE parsing loop in update_beacon_info() advances by (pIE->length + 2) each iteration but only guards on i < len. When a malicious AP sends a Beacon whose last IE has only one byte remaining in the frame (the element_id byte lands at len-1), the loop reads pIE->length from one byte past the allocated receive buffer. Additionally, even when the header bytes are in bounds, pIE->length itself can extend the data window beyond len, passing a truncated IE to the handler functions. Add two guards at the top of the loop body: 1. Break if fewer than sizeof(*pIE) bytes remain (can't read header). 2. Break if the IE's declared data extends past len. Also replace i += (pIE->length + 2) with i += sizeof(*pIE) + pIE->length for consistency with the sizeof(*pIE) guards added above.
Severity
8.1 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 5e8db4cff5b45c7c4edc8ae3f302027c3bb32b25 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 6dd5e8c3011ebabf417257d7f07901a7c4311539 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 9193c34f75fd9e1ea8a590d7cced464c3380dc29 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < bd953d52d587d42365e399b96c52dbdb13032070 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 69f174a0673b6b7a29b851adb60bc450cdc0ecc4 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < b5cc2f999927f69723ca53f1f2a3aa37dbeda907 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < ed51de4a86e173c3b0ef78e039c2e49e08b11f16 (git)
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Linux Linux Affected: 4.12
Unaffected: 0 , < 4.12 (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)
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          },
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/6dd5e8c3011ebabf417257d7f07901a7c4311539"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/9193c34f75fd9e1ea8a590d7cced464c3380dc29"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/b5cc2f999927f69723ca53f1f2a3aa37dbeda907"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/bd953d52d587d42365e399b96c52dbdb13032070"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/ed51de4a86e173c3b0ef78e039c2e49e08b11f16"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-125"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-07-30T09:52:12+00:00",
      "cve": "CVE-2026-64443",
      "id": "CVE-2026-64443",
      "initial_release_date": "2026-07-25T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: staging: rtl8723bs: fix OOB read in update_beacon_info() IE loop",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64443.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-03T00:44:15Z",
      "cve": "CVE-2026-64443",
      "id": "CVE-2026-64443",
      "initial_release_date": "2026-07-25T15:59:15Z",
      "product_status:known_affected": "671",
      "product_status:known_not_affected": "64",
      "product_status:recommended": "256",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64443",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64443.json",
      "version": "14"
    }
  }
}



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Taxonomy of the tags.





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

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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.