CVE-2026-74650 (GCVE-0-2026-74650)

Vulnerability from cvelistv5 – Published: 2026-08-22 15:32 – Updated: 2026-08-27 12:39
VLAI
Title
staging: rtl8723bs: fix OOB read in WMM_param_handler()
Summary
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB read in WMM_param_handler() WMM_param_handler() copies a fixed-size WMM parameter element out of a received information element without checking that the element is long enough, causing an out-of-bounds read for a short WMM IE. The handler reads sizeof(struct WMM_para_element) (18) bytes at pIE->data + 6, so it requires pIE->length to be at least 24 (WLAN_WMM_LEN), but it never validates the length. Two of its three callers reach it after matching only the WMM OUI: OnAssocRsp() in rtw_mlme_ext.c matches a 6-byte OUI, and join_cmd_hdl() matches a 4-byte OUI, before calling the handler. A vendor-specific IE carrying the WMM OUI but a length between 6 and 23, placed in an association response or in the IE blob handed to join_cmd_hdl(), passes the OUI check and then makes the memcmp() and memcpy() at pIE->data + 6 read past the end of the element. OnAssocRsp() parses a frame received from the AP, so this is reachable from a remote peer. The remaining caller in rtw_wlan_util.c already guards the handler with "pIE->length == WLAN_WMM_LEN". Move the equivalent check into the handler itself so every caller is covered; the sibling IE handlers in the same parsing loop (HT_caps_handler(), HT_info_handler(), ERP_IE_handler()) likewise bound their accesses by pIE->length.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 5df2fd06567df5f178c8faae0bdaefd203618d21 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 6cdca4c8b64c15a3ab9ad7a85f482e9519eadf93 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 2bee6f7a0f0125238951e31da2e96d06fe359043 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 1158b9931207392d6dd136aa0c4be18893b50fa1 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < ce2399717de242344880044b91a20a712644fdfb (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < e5b7610008f4e6a80c8b071aa77ddbd5e17ea472 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < e429c6dfd5d2324cd866daaf4c29d5cfe4dea0e4 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < ae21407350151bddfd4fea7aa39bd0643c0ca9d3 (git)
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Linux Linux Affected: 4.12
Unaffected: 0 , < 4.12 (semver)
Unaffected: 5.10.267 , ≤ 5.10.* (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.152 , ≤ 6.6.* (semver)
Unaffected: 6.12.104 , ≤ 6.12.* (semver)
Unaffected: 6.18.45 , ≤ 6.18.* (semver)
Unaffected: 7.1.9 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix OOB read in WMM_param_handler()\n\nWMM_param_handler() copies a fixed-size WMM parameter element out of a\nreceived information element without checking that the element is long\nenough, causing an out-of-bounds read for a short WMM IE.\n\nThe handler reads sizeof(struct WMM_para_element) (18) bytes at\npIE-\u003edata + 6, so it requires pIE-\u003elength to be at least 24\n(WLAN_WMM_LEN), but it never validates the length. Two of its three\ncallers reach it after matching only the WMM OUI: OnAssocRsp() in\nrtw_mlme_ext.c matches a 6-byte OUI, and join_cmd_hdl() matches a\n4-byte OUI, before calling the handler. A vendor-specific IE carrying\nthe WMM OUI but a length between 6 and 23, placed in an association\nresponse or in the IE blob handed to join_cmd_hdl(), passes the OUI\ncheck and then makes the memcmp() and memcpy() at pIE-\u003edata + 6 read\npast the end of the element. OnAssocRsp() parses a frame received from\nthe AP, so this is reachable from a remote peer.\n\nThe remaining caller in rtw_wlan_util.c already guards the handler with\n\"pIE-\u003elength == WLAN_WMM_LEN\". Move the equivalent check into the\nhandler itself so every caller is covered; the sibling IE handlers in\nthe same parsing loop (HT_caps_handler(), HT_info_handler(),\nERP_IE_handler()) likewise bound their accesses by pIE-\u003elength."
        }
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        {
          "url": "https://git.kernel.org/stable/c/ae21407350151bddfd4fea7aa39bd0643c0ca9d3"
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    "cveId": "CVE-2026-74650",
    "datePublished": "2026-08-22T15:32:26.333Z",
    "dateReserved": "2026-08-15T05:44:03.923Z",
    "dateUpdated": "2026-08-27T12:39:54.006Z",
    "state": "PUBLISHED"
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Two of its three\\ncallers reach it after matching only the WMM OUI: OnAssocRsp() in\\nrtw_mlme_ext.c matches a 6-byte OUI, and join_cmd_hdl() matches a\\n4-byte OUI, before calling the handler. A vendor-specific IE carrying\\nthe WMM OUI but a length between 6 and 23, placed in an association\\nresponse or in the IE blob handed to join_cmd_hdl(), passes the OUI\\ncheck and then makes the memcmp() and memcpy() at pIE-\u003edata + 6 read\\npast the end of the element. OnAssocRsp() parses a frame received from\\nthe AP, so this is reachable from a remote peer.\\n\\nThe remaining caller in rtw_wlan_util.c already guards the handler with\\n\\\"pIE-\u003elength == WLAN_WMM_LEN\\\". Move the equivalent check into the\\nhandler itself so every caller is covered; the sibling IE handlers in\\nthe same parsing loop (HT_caps_handler(), HT_info_handler(),\\nERP_IE_handler()) likewise bound their accesses by pIE-\u003elength.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/staging/rtl8723bs/core/rtw_wlan_util.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"5df2fd06567df5f178c8faae0bdaefd203618d21\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"6cdca4c8b64c15a3ab9ad7a85f482e9519eadf93\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"2bee6f7a0f0125238951e31da2e96d06fe359043\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"1158b9931207392d6dd136aa0c4be18893b50fa1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"ce2399717de242344880044b91a20a712644fdfb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"e5b7610008f4e6a80c8b071aa77ddbd5e17ea472\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"e429c6dfd5d2324cd866daaf4c29d5cfe4dea0e4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"ae21407350151bddfd4fea7aa39bd0643c0ca9d3\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/staging/rtl8723bs/core/rtw_wlan_util.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\":\"5.10.267\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.216\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.183\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.152\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.104\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.45\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.9\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1158b9931207392d6dd136aa0c4be18893b50fa1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2bee6f7a0f0125238951e31da2e96d06fe359043\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5df2fd06567df5f178c8faae0bdaefd203618d21\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6cdca4c8b64c15a3ab9ad7a85f482e9519eadf93\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ae21407350151bddfd4fea7aa39bd0643c0ca9d3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ce2399717de242344880044b91a20a712644fdfb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e429c6dfd5d2324cd866daaf4c29d5cfe4dea0e4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e5b7610008f4e6a80c8b071aa77ddbd5e17ea472\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "current_release_date": "2026-08-24T11:23:24+00:00",
      "cve": "CVE-2026-74650",
      "id": "CVE-2026-74650",
      "initial_release_date": "2026-08-22T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: staging: rtl8723bs: fix OOB read in WMM_param_handler()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74650.json",
      "version": "3"
    }
  }
}



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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

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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.