Vulnerability-Lookup

FKIE_CVE-2026-31626

Vulnerability from fkie_nvd - Published: 2026-04-24 15:16 - Updated: 2026-06-17 10:34

Severity

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

Summary

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: initialize le_tmp64 in rtw_BIP_verify() Initialize le_tmp64 to zero in rtw_BIP_verify() to prevent using uninitialized data. Smatch warns that only 6 bytes are copied to this 8-byte (u64) variable, leaving the last two bytes uninitialized: drivers/staging/rtl8723bs/core/rtw_security.c:1308 rtw_BIP_verify() warn: not copying enough bytes for '&le_tmp64' (8 vs 6 bytes) Initializing the variable at the start of the function fixes this warning and ensures predictable behavior.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/51532c7c1d357145f4ac561648499f7a6847f739
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6792624d933146e2757b07092e93ad915cb58930
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8c964b82a4e97ec7f25e17b803ee196009b38a57	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9e911eead187240193516edf55a0e1ab3425aa5b
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b487a7754d874230299d5a9c2710ec4df8b2ed8a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c2026c6b603ebec52f55015496703fe79077accf	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c65ee4d3be5df395e48afbcd0946dd5fce4338a9	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d5b8f5f8d6fc09a8af5ed139c688660f578ed732	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ef74ce5f0bc0e53ce702d8a794f3957884a26efc	Patch

Impacted products

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

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/staging/rtl8723bs/core/rtw_security.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b",
              "versionType": "git"
            },
            {
              "lessThan": "51532c7c1d357145f4ac561648499f7a6847f739",
              "status": "affected",
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              "versionType": "git"
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            {
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              "versionType": "git"
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "4.12"
            },
            {
              "lessThan": "4.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "5.10.258",
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              "status": "unaffected",
              "version": "6.1.175",
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            {
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              "status": "unaffected",
              "version": "6.6.136",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "6.12.83",
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            },
            {
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              "status": "unaffected",
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              "status": "unaffected",
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            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
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              "versionEndExcluding": "6.6.136",
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            {
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              "vulnerable": true
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          "negate": false,
          "operator": "OR"
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      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: initialize le_tmp64 in rtw_BIP_verify()\n\nInitialize le_tmp64 to zero in rtw_BIP_verify() to prevent using\nuninitialized data.\n\nSmatch warns that only 6 bytes are copied to this 8-byte (u64)\nvariable, leaving the last two bytes uninitialized:\n\ndrivers/staging/rtl8723bs/core/rtw_security.c:1308 rtw_BIP_verify()\nwarn: not copying enough bytes for \u0027\u0026le_tmp64\u0027 (8 vs 6 bytes)\n\nInitializing the variable at the start of the function fixes this\nwarning and ensures predictable behavior."
    }
  ],
  "id": "CVE-2026-31626",
  "lastModified": "2026-06-17T10:34:07.060",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 4.2,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-04-24T15:16:41.907",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/51532c7c1d357145f4ac561648499f7a6847f739"
    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    },
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    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    },
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    },
    {
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    },
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    }
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-908"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-31626 (GCVE-0-2026-31626)

Vulnerability from cvelistv5 – Published: 2026-04-24 14:42 – Updated: 2026-08-05 12:23

Title

staging: rtl8723bs: initialize le_tmp64 in rtw_BIP_verify()

Summary

Severity

7.1 (High)


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

Assigner

Linux mitre root

References

9 references

URL	Tags
https://git.kernel.org/stable/c/6792624d933146e27…
https://git.kernel.org/stable/c/51532c7c1d357145f…
https://git.kernel.org/stable/c/9e911eead18724019…
https://git.kernel.org/stable/c/c65ee4d3be5df395e…
https://git.kernel.org/stable/c/d5b8f5f8d6fc09a8a…
https://git.kernel.org/stable/c/b487a7754d8742302…
https://git.kernel.org/stable/c/c2026c6b603ebec52…
https://git.kernel.org/stable/c/ef74ce5f0bc0e53ce…
https://git.kernel.org/stable/c/8c964b82a4e97ec7f…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 6792624d933146e2757b07092e93ad915cb58930 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 51532c7c1d357145f4ac561648499f7a6847f739 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 9e911eead187240193516edf55a0e1ab3425aa5b (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < c65ee4d3be5df395e48afbcd0946dd5fce4338a9 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < d5b8f5f8d6fc09a8af5ed139c688660f578ed732 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < b487a7754d874230299d5a9c2710ec4df8b2ed8a (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < c2026c6b603ebec52f55015496703fe79077accf (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < ef74ce5f0bc0e53ce702d8a794f3957884a26efc (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 8c964b82a4e97ec7f25e17b803ee196009b38a57 (git)
Linux	Linux	Affected: 4.12 Unaffected: 0 , < 4.12 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.136 , ≤ 6.6.* (semver) Unaffected: 6.12.83 , ≤ 6.12.* (semver) Unaffected: 6.18.24 , ≤ 6.18.* (semver) Unaffected: 6.19.14 , ≤ 6.19.* (semver) Unaffected: 7.0.1 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/staging/rtl8723bs/core/rtw_security.c"
          ],
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              "version": "6.18.24",
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              "version": "6.19.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.14",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.1",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "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: initialize le_tmp64 in rtw_BIP_verify()\n\nInitialize le_tmp64 to zero in rtw_BIP_verify() to prevent using\nuninitialized data.\n\nSmatch warns that only 6 bytes are copied to this 8-byte (u64)\nvariable, leaving the last two bytes uninitialized:\n\ndrivers/staging/rtl8723bs/core/rtw_security.c:1308 rtw_BIP_verify()\nwarn: not copying enough bytes for \u0027\u0026le_tmp64\u0027 (8 vs 6 bytes)\n\nInitializing the variable at the start of the function fixes this\nwarning and ensures predictable behavior."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - The vulnerable code is reached from received 802.11 management frames handled by the rtl8723bs WiFi driver, so the attacker must be within WiFi radio range rather than on an IP network or local shell.\nAC:L - Once the station is linked with 802.11w/BIP enabled, frame injection or replay is attacker-controlled and the vulnerable uninitialized IPN comparison is reached reliably; repeated attempts can exercise the favorable cases.\nPR:N - No local account or kernel privilege is required on the victim. The relevant gate is wireless/BIP frame validity, not an attacker privilege level on the vulnerable system.\nUI:N - After the device is connected to a protected WiFi network, exploitation is driven by received management frames and does not require user action at the time of attack.\nS:U - The impact remains within the same kernel/driver and network-interface security authority. There is no VM, IOMMU, or separate sandbox boundary crossed.\nC:N - The uninitialized stack bytes are consumed internally as high bits of the BIP packet number and are not copied to userspace or transmitted back to the attacker. No practical kernel memory disclosure primitive is exposed.\nI:L - The bug can corrupt the logical BIP replay comparison, potentially allowing acceptance of replayed valid protected deauth/disassoc frames or rejection of legitimate ones. This affects management-frame state but does not provide arbitrary data modification or code execution.\nA:H - Accepted replayed protected deauth/disassoc frames can disconnect the station, and repeated adjacent injection can deny WiFi connectivity for the affected interface. There is no kernel crash, but the vulnerable component\u0027s network availability can be fully disrupted."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:23:53.335Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6792624d933146e2757b07092e93ad915cb58930"
        },
        {
          "url": "https://git.kernel.org/stable/c/51532c7c1d357145f4ac561648499f7a6847f739"
        },
        {
          "url": "https://git.kernel.org/stable/c/9e911eead187240193516edf55a0e1ab3425aa5b"
        },
        {
          "url": "https://git.kernel.org/stable/c/c65ee4d3be5df395e48afbcd0946dd5fce4338a9"
        },
        {
          "url": "https://git.kernel.org/stable/c/d5b8f5f8d6fc09a8af5ed139c688660f578ed732"
        },
        {
          "url": "https://git.kernel.org/stable/c/b487a7754d874230299d5a9c2710ec4df8b2ed8a"
        },
        {
          "url": "https://git.kernel.org/stable/c/c2026c6b603ebec52f55015496703fe79077accf"
        },
        {
          "url": "https://git.kernel.org/stable/c/ef74ce5f0bc0e53ce702d8a794f3957884a26efc"
        },
        {
          "url": "https://git.kernel.org/stable/c/8c964b82a4e97ec7f25e17b803ee196009b38a57"
        }
      ],
      "title": "staging: rtl8723bs: initialize le_tmp64 in rtw_BIP_verify()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31626",
    "datePublished": "2026-04-24T14:42:47.493Z",
    "dateReserved": "2026-03-09T15:48:24.124Z",
    "dateUpdated": "2026-08-05T12:23:53.335Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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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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.

Action not permitted

FKIE_CVE-2026-31626

CVE-2026-31626 (GCVE-0-2026-31626)

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Sightings

Nomenclature

Related by attack behaviour