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

Vulnerability from cvelistv5 – Published: 2026-04-24 14:42 – Updated: 2026-08-05 12:23
VLAI
Title
staging: rtl8723bs: initialize le_tmp64 in rtw_BIP_verify()
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.
Severity
7.1 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Assigner
References
Impacted 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)
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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)
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{
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              "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."
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    "dateReserved": "2026-03-09T15:48:24.124Z",
    "dateUpdated": "2026-08-05T12:23:53.335Z",
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      "source": "Microsoft CSAF VEX",
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      "title": "staging: rtl8723bs: initialize le_tmp64 in rtw_BIP_verify()",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-31626.json",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-31626\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-04-24T15:16:41.907\",\"lastModified\":\"2026-06-17T10:34:07.060\",\"vulnStatus\":\"Modified\",\"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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/staging/rtl8723bs/core/rtw_security.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"6792624d933146e2757b07092e93ad915cb58930\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"51532c7c1d357145f4ac561648499f7a6847f739\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"9e911eead187240193516edf55a0e1ab3425aa5b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"c65ee4d3be5df395e48afbcd0946dd5fce4338a9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"d5b8f5f8d6fc09a8af5ed139c688660f578ed732\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"b487a7754d874230299d5a9c2710ec4df8b2ed8a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"c2026c6b603ebec52f55015496703fe79077accf\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"ef74ce5f0bc0e53ce702d8a794f3957884a26efc\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"8c964b82a4e97ec7f25e17b803ee196009b38a57\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/staging/rtl8723bs/core/rtw_security.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.12\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.12\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.258\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.209\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.175\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.136\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.83\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.24\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19.14\",\"lessThanOrEqual\":\"6.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.1\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":4.2}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-908\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.12\",\"versionEndExcluding\":\"6.6.136\",\"matchCriteriaId\":\"022BB187-782F-49F9-A3AE-9DCC0B6012CE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.83\",\"matchCriteriaId\":\"7F0AE5B5-23AC-4DCC-B37A-51CA1DAE7BA8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.24\",\"matchCriteriaId\":\"8126B8B8-6D0B-4443-86C1-672AEE893555\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.19\",\"versionEndExcluding\":\"6.19.14\",\"matchCriteriaId\":\"D6A8A074-BBF4-4803-ABED-519A839435BB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"7.0\",\"versionEndExcluding\":\"7.0.1\",\"matchCriteriaId\":\"9B5888AB-7403-4335-89E4-21CC0B48366A\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/51532c7c1d357145f4ac561648499f7a6847f739\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6792624d933146e2757b07092e93ad915cb58930\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8c964b82a4e97ec7f25e17b803ee196009b38a57\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9e911eead187240193516edf55a0e1ab3425aa5b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b487a7754d874230299d5a9c2710ec4df8b2ed8a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c2026c6b603ebec52f55015496703fe79077accf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c65ee4d3be5df395e48afbcd0946dd5fce4338a9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d5b8f5f8d6fc09a8af5ed139c688660f578ed732\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ef74ce5f0bc0e53ce702d8a794f3957884a26efc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-28T07:26:49+00:00",
      "cve": "CVE-2026-31626",
      "id": "CVE-2026-31626",
      "initial_release_date": "2026-04-24T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: staging: rtl8723bs: initialize le_tmp64 in rtw_BIP_verify()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31626.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-22T00:06:33Z",
      "cve": "CVE-2026-31626",
      "id": "CVE-2026-31626",
      "initial_release_date": "2026-04-25T01:37:40Z",
      "product_status:known_affected": "208",
      "product_status:known_not_affected": "35",
      "product_status:recommended": "102",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-31626",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-31626.json",
      "version": "8"
    }
  }
}



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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.


Detection rules are retrieved from Rulezet.