CVE-2026-64117 (GCVE-0-2026-64117)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:40 – Updated: 2026-07-20 13:43
VLAI
Title
wifi: mac80211: capture fast-RX rate before mesh reuses skb->cb
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: capture fast-RX rate before mesh reuses skb->cb ieee80211_invoke_fast_rx() reads RX status through IEEE80211_SKB_RXCB(skb), which aliases the same skb->cb storage that ieee80211_rx_mesh_data() reuses as IEEE80211_TX_INFO. In the unicast forward path, mesh_data does: info = IEEE80211_SKB_CB(fwd_skb); memset(info, 0, sizeof(*info)); on the same skb the caller still names via rx->skb, then either queues the skb for TX (success) or kfree_skb()'s it (no-route) before returning RX_QUEUED. The caller's RX_QUEUED arm then calls sta_stats_encode_rate(status) on memory that is either zeroed (success path) or freed (no-route path). The latter is KASAN slab-use-after-free in ieee80211_prepare_and_rx_handle. Fix by encoding the rate from status before invoking ieee80211_rx_mesh_data(), so the RX_QUEUED arm consumes a value captured while status was still backed by valid memory.
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
Linux Linux Affected: 3468e1e0c639032a603450f0830ccabfa76f5806 , < 2fb64f94f9afb774f2fa0c7835727d7a67f89f07 (git)
Affected: 3468e1e0c639032a603450f0830ccabfa76f5806 , < d71c841be5d9e586ee7f36c0dc8ed4db0d9a1349 (git)
Create a notification for this product.
Linux Linux Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 7.0.11 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/rx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2fb64f94f9afb774f2fa0c7835727d7a67f89f07",
              "status": "affected",
              "version": "3468e1e0c639032a603450f0830ccabfa76f5806",
              "versionType": "git"
            },
            {
              "lessThan": "d71c841be5d9e586ee7f36c0dc8ed4db0d9a1349",
              "status": "affected",
              "version": "3468e1e0c639032a603450f0830ccabfa76f5806",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/rx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
              "lessThan": "6.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.11",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: capture fast-RX rate before mesh reuses skb-\u003ecb\n\nieee80211_invoke_fast_rx() reads RX status through\nIEEE80211_SKB_RXCB(skb), which aliases the same skb-\u003ecb storage\nthat ieee80211_rx_mesh_data() reuses as IEEE80211_TX_INFO.  In the\nunicast forward path, mesh_data does:\n\n\tinfo = IEEE80211_SKB_CB(fwd_skb);\n\tmemset(info, 0, sizeof(*info));\n\non the same skb the caller still names via rx-\u003eskb, then either\nqueues the skb for TX (success) or kfree_skb()\u0027s it (no-route)\nbefore returning RX_QUEUED.  The caller\u0027s RX_QUEUED arm then\ncalls sta_stats_encode_rate(status) on memory that is either\nzeroed (success path) or freed (no-route path).  The latter is\nKASAN slab-use-after-free in ieee80211_prepare_and_rx_handle.\n\nFix by encoding the rate from status before invoking\nieee80211_rx_mesh_data(), so the RX_QUEUED arm consumes a value\ncaptured while status was still backed by valid memory."
        }
      ],
      "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"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-20T13:43:31.348Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2fb64f94f9afb774f2fa0c7835727d7a67f89f07"
        },
        {
          "url": "https://git.kernel.org/stable/c/d71c841be5d9e586ee7f36c0dc8ed4db0d9a1349"
        }
      ],
      "title": "wifi: mac80211: capture fast-RX rate before mesh reuses skb-\u003ecb",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64117",
    "datePublished": "2026-07-19T15:40:16.941Z",
    "dateReserved": "2026-07-19T07:54:57.035Z",
    "dateUpdated": "2026-07-20T13:43:31.348Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-64117",
      "date": "2026-07-21",
      "epss": "0.00234",
      "percentile": "0.14358"
    },
    "microsoft_vex": {
      "current_release_date": "2026-07-21T01:02:37.000Z",
      "cve": "CVE-2026-64117",
      "id": "msrc_CVE-2026-64117",
      "initial_release_date": "2026-07-21T01:02:37.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "wifi: mac80211: capture fast-RX rate before mesh reuses skb-\u003ecb",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-64117.json",
      "version": "1"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-64117\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-19T16:17:53.217\",\"lastModified\":\"2026-07-20T15:17:10.553\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nwifi: mac80211: capture fast-RX rate before mesh reuses skb-\u003ecb\\n\\nieee80211_invoke_fast_rx() reads RX status through\\nIEEE80211_SKB_RXCB(skb), which aliases the same skb-\u003ecb storage\\nthat ieee80211_rx_mesh_data() reuses as IEEE80211_TX_INFO.  In the\\nunicast forward path, mesh_data does:\\n\\n\\tinfo = IEEE80211_SKB_CB(fwd_skb);\\n\\tmemset(info, 0, sizeof(*info));\\n\\non the same skb the caller still names via rx-\u003eskb, then either\\nqueues the skb for TX (success) or kfree_skb()\u0027s it (no-route)\\nbefore returning RX_QUEUED.  The caller\u0027s RX_QUEUED arm then\\ncalls sta_stats_encode_rate(status) on memory that is either\\nzeroed (success path) or freed (no-route path).  The latter is\\nKASAN slab-use-after-free in ieee80211_prepare_and_rx_handle.\\n\\nFix by encoding the rate from status before invoking\\nieee80211_rx_mesh_data(), so the RX_QUEUED arm consumes a value\\ncaptured while status was still backed by valid memory.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/mac80211/rx.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3468e1e0c639032a603450f0830ccabfa76f5806\",\"lessThan\":\"2fb64f94f9afb774f2fa0c7835727d7a67f89f07\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3468e1e0c639032a603450f0830ccabfa76f5806\",\"lessThan\":\"d71c841be5d9e586ee7f36c0dc8ed4db0d9a1349\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/mac80211/rx.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.4\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.4\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.11\",\"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: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/2fb64f94f9afb774f2fa0c7835727d7a67f89f07\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d71c841be5d9e586ee7f36c0dc8ed4db0d9a1349\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-21T07:20:53+00:00",
      "cve": "CVE-2026-64117",
      "id": "CVE-2026-64117",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:known_affected": "246",
      "product_status:known_not_affected": "29",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: mac80211: capture fast-RX rate before mesh reuses skb-\u003ecb",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64117.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-07-21T12:59:23Z",
      "cve": "CVE-2026-64117",
      "id": "CVE-2026-64117",
      "initial_release_date": "2026-07-21T12:59:23Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64117",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64117.json",
      "version": "2"
    }
  }
}



Log in or create an account to share your comment.




Tags
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.


Detection rules are retrieved from Rulezet.