CVE-2026-68326 (GCVE-0-2026-68326)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:03 – Updated: 2026-08-19 16:33
VLAI
Title
wifi: mwifiex: bound uAP association event IEs to the event buffer
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mwifiex: bound uAP association event IEs to the event buffer mwifiex_process_uap_event() handles EVENT_UAP_STA_ASSOC by exposing the (re)association request IEs that the firmware copies into the event: sinfo->assoc_req_ies = &event->data[len]; len = (u8 *)sinfo->assoc_req_ies - (u8 *)&event->frame_control; sinfo->assoc_req_ies_len = le16_to_cpu(event->len) - (u16)len; event->len is supplied by the device firmware and is never validated, and the subtraction is unchecked. assoc_req_ies points into adapter->event_body[MAX_EVENT_SIZE], a fixed-size array embedded in the kmalloc()'d struct mwifiex_adapter. On the ap_11n_enabled path mwifiex_set_sta_ht_cap() walks these IEs with cfg80211_find_ie(), whose for_each_element() loop dereferences each element header. A firmware-reported event->len larger than the bytes actually received makes assoc_req_ies_len describe IEs that extend past event_body, so the walk reads out of the adapter slab object, a slab-out-of-bounds read (KASAN: slab-out-of-bounds in cfg80211_find_ie). An event->len smaller than the header instead makes the int subtraction negative, which wraps to a huge size_t when stored in assoc_req_ies_len. The same length is handed to cfg80211_new_sta(), so a more modest over-claim can also copy stale event_body bytes into the NL80211_CMD_NEW_STATION notification. A malicious or malfunctioning mwifiex device (USB/SDIO/PCIe) can deliver such an event while the interface is in AP/uAP mode. Validate event->len before use: reject a length that underflows the header or that would place the IEs outside the event_body[] buffer the event was copied into. event->len here is struct mwifiex_assoc_event.len, a payload field internal to this event, not the transport frame length, so it is validated in this handler rather than at the generic MWIFIEX_TYPE_EVENT receive path, which only sees the event cause and the transport frame length. The bound is against event_body[MAX_EVENT_SIZE] rather than the actually-received length because the transports store the event differently (USB and SDIO leave the 4-byte event header in event_skb, PCIe strips it via skb_pull), whereas event_body is the single fixed buffer all of them copy the event into. This is the event-path analogue of the receive-path bounds checks added in commit 119585281617 ("wifi: mwifiex: Fix OOB and integer underflow when rx packets").
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e568634ae7ac379661c90731d480e067929420a1 , < a616616b938f7922a93e79bef16b4643c57c0922 (git)
Affected: e568634ae7ac379661c90731d480e067929420a1 , < 1ae00b6d9a6c82eb3de151d9b04ed59e06cc100f (git)
Affected: e568634ae7ac379661c90731d480e067929420a1 , < e7e93d3e8c240bdb70c41e79d169d74dfb442843 (git)
Affected: e568634ae7ac379661c90731d480e067929420a1 , < a3f47d7c75ddad1a14621a309286f9fae3cba191 (git)
Affected: e568634ae7ac379661c90731d480e067929420a1 , < ad26c75ae25749313248f06510ebe43b5bf4adcc (git)
Affected: e568634ae7ac379661c90731d480e067929420a1 , < d21464d93f8ba464dc3d7b4b31c6e0adcd9f659c (git)
Affected: e568634ae7ac379661c90731d480e067929420a1 , < b6766d7ea43edf5de9d5a572bc58b631d09efe4b (git)
Affected: e568634ae7ac379661c90731d480e067929420a1 , < f0858bfc7d3cab411a447b88e3ef970e575032c9 (git)
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Linux Linux Affected: 3.5
Unaffected: 0 , < 3.5 (semver)
Unaffected: 5.10.265 , ≤ 5.10.* (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.148 , ≤ 6.6.* (semver)
Unaffected: 6.12.101 , ≤ 6.12.* (semver)
Unaffected: 6.18.42 , ≤ 6.18.* (semver)
Unaffected: 7.1.6 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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          "product": "Linux",
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            "drivers/net/wireless/marvell/mwifiex/uap_event.c"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mwifiex: bound uAP association event IEs to the event buffer\n\nmwifiex_process_uap_event() handles EVENT_UAP_STA_ASSOC by exposing the\n(re)association request IEs that the firmware copies into the event:\n\n\tsinfo-\u003eassoc_req_ies = \u0026event-\u003edata[len];\n\tlen = (u8 *)sinfo-\u003eassoc_req_ies - (u8 *)\u0026event-\u003eframe_control;\n\tsinfo-\u003eassoc_req_ies_len = le16_to_cpu(event-\u003elen) - (u16)len;\n\nevent-\u003elen is supplied by the device firmware and is never validated,\nand the subtraction is unchecked.  assoc_req_ies points into\nadapter-\u003eevent_body[MAX_EVENT_SIZE], a fixed-size array embedded in the\nkmalloc()\u0027d struct mwifiex_adapter.\n\nOn the ap_11n_enabled path mwifiex_set_sta_ht_cap() walks these IEs with\ncfg80211_find_ie(), whose for_each_element() loop dereferences each\nelement header.  A firmware-reported event-\u003elen larger than the bytes\nactually received makes assoc_req_ies_len describe IEs that extend past\nevent_body, so the walk reads out of the adapter slab object, a\nslab-out-of-bounds read (KASAN: slab-out-of-bounds in cfg80211_find_ie).\nAn event-\u003elen smaller than the header instead makes the int subtraction\nnegative, which wraps to a huge size_t when stored in assoc_req_ies_len.\nThe same length is handed to cfg80211_new_sta(), so a more modest\nover-claim can also copy stale event_body bytes into the\nNL80211_CMD_NEW_STATION notification.\n\nA malicious or malfunctioning mwifiex device (USB/SDIO/PCIe) can deliver\nsuch an event while the interface is in AP/uAP mode.\n\nValidate event-\u003elen before use: reject a length that underflows the\nheader or that would place the IEs outside the event_body[] buffer the\nevent was copied into.  event-\u003elen here is struct mwifiex_assoc_event.len,\na payload field internal to this event, not the transport frame length,\nso it is validated in this handler rather than at the generic\nMWIFIEX_TYPE_EVENT receive path, which only sees the event cause and the\ntransport frame length.  The bound is against event_body[MAX_EVENT_SIZE]\nrather than the actually-received length because the transports store the\nevent differently (USB and SDIO leave the 4-byte event header in\nevent_skb, PCIe strips it via skb_pull), whereas event_body is the single\nfixed buffer all of them copy the event into.  This is the event-path\nanalogue of the receive-path bounds checks added in commit 119585281617\n(\"wifi: mwifiex: Fix OOB and integer underflow when rx packets\")."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - The event payload is the firmware\u0027s rendering of an over-the-air (re)association request received by the mwifiex uAP interface, with event-\u003elen being the TLV length covering that frame, so the triggering input comes from a station within 802.11 radio range. This matches the Adjacent treatment used for other frame/event-driven mwifiex defects (CVE-2024-46755, CVE-2023-53226).\nAC:L - No race or attacker-uncontrollable state is involved: the attacker simply sends a crafted/oversized (re)association request to the AP, and the handler parses the resulting EVENT_UAP_STA_ASSOC unconditionally. The only precondition, an mwifiex interface in AP/uAP mode with ap_11n_enabled, is the normal steady state for tethering, Chromebook SoftAP and embedded AP deployments.\nPR:N - EVENT_UAP_STA_ASSOC is generated at association time, before the WPA/EAPOL handshake, so the attacker needs no credentials on or accepted association with the target host. No host user account or capability is involved anywhere on the path.\nUI:N - The event is consumed autonomously by mwifiex_process_uap_event() in the driver\u0027s main work handler as soon as the firmware delivers it; no local user or administrator action is required beyond the AP already running.\nS:U - The out-of-bounds read, the underflowed length and the resulting corruption are all confined to the host kernel\u0027s own security authority within the mwifiex/cfg80211 code; no hypervisor, IOMMU or sandbox boundary is crossed.\nC:H - An over-claimed event-\u003elen makes assoc_req_ies_len describe memory past adapter-\u003eevent_body[MAX_EVENT_SIZE], producing a slab-out-of-bounds read in cfg80211_find_ie() and, worse, causing nla_put() to copy up to tens of kilobytes of adjacent kernel slab memory into the NL80211_CMD_NEW_STATION notification delivered to userspace \u2014 an unbounded kernel heap disclosure, not a few stray bytes.\nI:H - An event-\u003elen below the header makes the int subtraction negative and wrap in size_t; that value reaches nla_put(), where nla_total_size() of the negative length evaluates to 0 and passes the tailroom check, so __nla_put()\u0027s memcpy() runs with the negative length widened to a huge size_t \u2014 an unbounded out-of-bounds write past the netlink skb. Driver 11n/AMSDU state is also set from out-of-bounds data.\nA:H - The commit documents a reproducible KASAN slab-out-of-bounds in cfg80211_find_ie, and the underflow path drives a memcpy of a near-2^64 length that guarantees an immediate kernel panic. The condition can be re-triggered at will by repeating the association attempt."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:33:21.015Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a616616b938f7922a93e79bef16b4643c57c0922"
        },
        {
          "url": "https://git.kernel.org/stable/c/1ae00b6d9a6c82eb3de151d9b04ed59e06cc100f"
        },
        {
          "url": "https://git.kernel.org/stable/c/e7e93d3e8c240bdb70c41e79d169d74dfb442843"
        },
        {
          "url": "https://git.kernel.org/stable/c/a3f47d7c75ddad1a14621a309286f9fae3cba191"
        },
        {
          "url": "https://git.kernel.org/stable/c/ad26c75ae25749313248f06510ebe43b5bf4adcc"
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        {
          "url": "https://git.kernel.org/stable/c/d21464d93f8ba464dc3d7b4b31c6e0adcd9f659c"
        },
        {
          "url": "https://git.kernel.org/stable/c/b6766d7ea43edf5de9d5a572bc58b631d09efe4b"
        },
        {
          "url": "https://git.kernel.org/stable/c/f0858bfc7d3cab411a447b88e3ef970e575032c9"
        }
      ],
      "title": "wifi: mwifiex: bound uAP association event IEs to the event buffer",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68326",
    "datePublished": "2026-08-10T12:03:02.372Z",
    "dateReserved": "2026-07-30T09:28:09.382Z",
    "dateUpdated": "2026-08-19T16:33:21.015Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-68326",
      "date": "2026-08-20",
      "epss": "0.00266",
      "percentile": "0.18629"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-68326\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-10T13:20:22.783\",\"lastModified\":\"2026-08-19T17:20:42.817\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nwifi: mwifiex: bound uAP association event IEs to the event buffer\\n\\nmwifiex_process_uap_event() handles EVENT_UAP_STA_ASSOC by exposing the\\n(re)association request IEs that the firmware copies into the event:\\n\\n\\tsinfo-\u003eassoc_req_ies = \u0026event-\u003edata[len];\\n\\tlen = (u8 *)sinfo-\u003eassoc_req_ies - (u8 *)\u0026event-\u003eframe_control;\\n\\tsinfo-\u003eassoc_req_ies_len = le16_to_cpu(event-\u003elen) - (u16)len;\\n\\nevent-\u003elen is supplied by the device firmware and is never validated,\\nand the subtraction is unchecked.  assoc_req_ies points into\\nadapter-\u003eevent_body[MAX_EVENT_SIZE], a fixed-size array embedded in the\\nkmalloc()\u0027d struct mwifiex_adapter.\\n\\nOn the ap_11n_enabled path mwifiex_set_sta_ht_cap() walks these IEs with\\ncfg80211_find_ie(), whose for_each_element() loop dereferences each\\nelement header.  A firmware-reported event-\u003elen larger than the bytes\\nactually received makes assoc_req_ies_len describe IEs that extend past\\nevent_body, so the walk reads out of the adapter slab object, a\\nslab-out-of-bounds read (KASAN: slab-out-of-bounds in cfg80211_find_ie).\\nAn event-\u003elen smaller than the header instead makes the int subtraction\\nnegative, which wraps to a huge size_t when stored in assoc_req_ies_len.\\nThe same length is handed to cfg80211_new_sta(), so a more modest\\nover-claim can also copy stale event_body bytes into the\\nNL80211_CMD_NEW_STATION notification.\\n\\nA malicious or malfunctioning mwifiex device (USB/SDIO/PCIe) can deliver\\nsuch an event while the interface is in AP/uAP mode.\\n\\nValidate event-\u003elen before use: reject a length that underflows the\\nheader or that would place the IEs outside the event_body[] buffer the\\nevent was copied into.  event-\u003elen here is struct mwifiex_assoc_event.len,\\na payload field internal to this event, not the transport frame length,\\nso it is validated in this handler rather than at the generic\\nMWIFIEX_TYPE_EVENT receive path, which only sees the event cause and the\\ntransport frame length.  The bound is against event_body[MAX_EVENT_SIZE]\\nrather than the actually-received length because the transports store the\\nevent differently (USB and SDIO leave the 4-byte event header in\\nevent_skb, PCIe strips it via skb_pull), whereas event_body is the single\\nfixed buffer all of them copy the event into.  This is the event-path\\nanalogue of the receive-path bounds checks added in commit 119585281617\\n(\\\"wifi: mwifiex: Fix OOB and integer underflow when rx packets\\\").\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/wireless/marvell/mwifiex/uap_event.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"e568634ae7ac379661c90731d480e067929420a1\",\"lessThan\":\"a616616b938f7922a93e79bef16b4643c57c0922\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e568634ae7ac379661c90731d480e067929420a1\",\"lessThan\":\"1ae00b6d9a6c82eb3de151d9b04ed59e06cc100f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e568634ae7ac379661c90731d480e067929420a1\",\"lessThan\":\"e7e93d3e8c240bdb70c41e79d169d74dfb442843\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e568634ae7ac379661c90731d480e067929420a1\",\"lessThan\":\"a3f47d7c75ddad1a14621a309286f9fae3cba191\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e568634ae7ac379661c90731d480e067929420a1\",\"lessThan\":\"ad26c75ae25749313248f06510ebe43b5bf4adcc\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e568634ae7ac379661c90731d480e067929420a1\",\"lessThan\":\"d21464d93f8ba464dc3d7b4b31c6e0adcd9f659c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e568634ae7ac379661c90731d480e067929420a1\",\"lessThan\":\"b6766d7ea43edf5de9d5a572bc58b631d09efe4b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e568634ae7ac379661c90731d480e067929420a1\",\"lessThan\":\"f0858bfc7d3cab411a447b88e3ef970e575032c9\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/wireless/marvell/mwifiex/uap_event.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.5\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.5\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.265\",\"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\":\"6.6.148\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.101\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.42\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.6\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"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:H/I:H/A:H\",\"baseScore\":8.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1ae00b6d9a6c82eb3de151d9b04ed59e06cc100f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a3f47d7c75ddad1a14621a309286f9fae3cba191\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a616616b938f7922a93e79bef16b4643c57c0922\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ad26c75ae25749313248f06510ebe43b5bf4adcc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b6766d7ea43edf5de9d5a572bc58b631d09efe4b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d21464d93f8ba464dc3d7b4b31c6e0adcd9f659c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e7e93d3e8c240bdb70c41e79d169d74dfb442843\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f0858bfc7d3cab411a447b88e3ef970e575032c9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-13T23:28:25+00:00",
      "cve": "CVE-2026-68326",
      "id": "CVE-2026-68326",
      "initial_release_date": "2026-08-10T00:00:00+00:00",
      "product_status:known_affected": "260",
      "product_status:known_not_affected": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: mwifiex: bound uAP association event IEs to the event buffer",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68326.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-11T23:47:46Z",
      "cve": "CVE-2026-68326",
      "id": "CVE-2026-68326",
      "initial_release_date": "2026-08-11T23:47:46Z",
      "product_status:known_affected": "193",
      "product_status:known_not_affected": "103",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68326",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68326.json",
      "version": "2"
    }
  }
}



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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.