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CVE-2026-90017 (GCVE-0-2026-90017)

Vulnerability from cvelistv5 – Published: 2026-09-16 10:33 – Updated: 2026-09-16 14:41
VLAI
Title
staging: rtl8723bs: fix OOB read in rtw_action_frame_parse()
Summary
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB read in rtw_action_frame_parse() rtw_action_frame_parse() takes a frame_len parameter but never actually checks it before indexing into the frame body: const u8 *frame_body = frame + sizeof(struct ieee80211_hdr_3addr); ... c = frame_body[0]; ... a = frame_body[1]; frame_body already points 24 bytes (sizeof(struct ieee80211_hdr_3addr)) into frame, so reading frame_body[0] and frame_body[1] requires frame_len >= 26. A management action frame shorter than that (e.g. exactly 24 bytes, the minimum a malicious peer can send) causes a 1-2 byte out-of-bounds read. This is reachable from rtw_cfg80211_monitor_if_xmit_entry() and cfg80211_rtw_mgmt_tx() in ioctl_cfg80211.c, both of which pass attacker/user-influenced frame buffers and lengths straight through. Add the missing length check before frame_body is dereferenced.
Severity
7.1 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 15081ff835b29e456da29303b32efc436df04695 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 310aaa8058d19cc431aedac0f5bb814e84479393 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 1410bce22351ba15d8e58287cbf09d55d7f21fc9 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 0b7f64c7bb9664777168768c6b44affb07dcbf24 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 136f9a3ab87ded8aaf081425cfb2059659dd9023 (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < b041e3f35e0d262d42a711094ab594634d72744a (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < a54fd1a44862d263df9f8bc17fca3620be31addb (git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < ff917923f4fb9c83717ba135ee47d7e4c1567bb7 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.12
Unaffected: 0 , < 4.12 (semver)
Unaffected: 5.10.270 , ≤ 5.10.* (semver)
Unaffected: 5.15.221 , ≤ 5.15.* (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.51 , ≤ 6.18.* (semver)
Unaffected: 7.2.5 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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      "cpeApplicability": [
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                  "versionStartIncluding": "4.12",
                  "vulnerable": true
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                  "vulnerable": true
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                  "vulnerable": true
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                  "versionEndExcluding": "7.2.5",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc2",
                  "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: fix OOB read in rtw_action_frame_parse()\n\nrtw_action_frame_parse() takes a frame_len parameter but never\nactually checks it before indexing into the frame body:\n\n\tconst u8 *frame_body = frame + sizeof(struct ieee80211_hdr_3addr);\n\t...\n\tc = frame_body[0];\n\t...\n\ta = frame_body[1];\n\nframe_body already points 24 bytes (sizeof(struct\nieee80211_hdr_3addr)) into frame, so reading frame_body[0] and\nframe_body[1] requires frame_len \u003e= 26. A management action frame\nshorter than that (e.g. exactly 24 bytes, the minimum a malicious\npeer can send) causes a 1-2 byte out-of-bounds read.\n\nThis is reachable from rtw_cfg80211_monitor_if_xmit_entry() and\ncfg80211_rtw_mgmt_tx() in ioctl_cfg80211.c, both of which pass\nattacker/user-influenced frame buffers and lengths straight through.\n\nAdd the missing length check before frame_body is dereferenced."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - rtw_action_frame_parse() is reached from rtw_cfg80211_rx_action() on received 802.11 public action frames (OnAction \u2192 on_action_public \u2192 on_action_public_default). A nearby attacker can inject a truncated management action frame over Wi-Fi; kernel CNA guidance maps Wi-Fi frame injection to Adjacent.\nAC:L - An adjacent attacker fully controls the action-frame length and 802.11 header. A 24- or 25-byte management action frame (header only, or header plus category) reliably hits the missing length check with no race or attacker-uncontrollable layout.\nPR:N - Public action frames are dispatched by mgt_dispatcher()/OnAction() with only a local-MAC match and no association or 802.11 authentication against the sender, so no local account or capability is required.\nUI:N - The rtl8723bs driver processes received management action frames automatically while the interface is up; no extra victim click, mount, or connect action is required at exploit time.\nS:U - The out-of-bounds read occurs in the host rtl8723bs driver and does not cross a VM, IOMMU, or other security-authority boundary.\nC:L - The flaw reads only one or two bytes past a truncated 24- or 25-byte action frame. Per kernel CNA guidance this is a strictly bounded out-of-bounds read, not an arbitrary read primitive.\nI:N - The bug is a read-only out-of-bounds access of the category/action bytes; those values are not used to write kernel memory or hijack control flow.\nA:H - A 1-2 byte kernel out-of-bounds read can oops or panic on KASAN, redzone, or hardened kernels, and an adjacent peer can repeat truncated action frames to deny availability."
            }
          ]
        }
      ],
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        "dateUpdated": "2026-09-16T14:41:35.855Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/15081ff835b29e456da29303b32efc436df04695"
        },
        {
          "url": "https://git.kernel.org/stable/c/310aaa8058d19cc431aedac0f5bb814e84479393"
        },
        {
          "url": "https://git.kernel.org/stable/c/1410bce22351ba15d8e58287cbf09d55d7f21fc9"
        },
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      "title": "staging: rtl8723bs: fix OOB read in rtw_action_frame_parse()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90017",
    "datePublished": "2026-09-16T10:33:22.827Z",
    "dateReserved": "2026-09-11T19:38:34.781Z",
    "dateUpdated": "2026-09-16T14:41:35.855Z",
    "state": "PUBLISHED"
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "current_release_date": "2026-09-17T01:12:54.000Z",
      "cve": "CVE-2026-90017",
      "id": "msrc_CVE-2026-90017",
      "initial_release_date": "2026-09-17T01:12:54.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "staging: rtl8723bs: fix OOB read in rtw_action_frame_parse()",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-90017.json",
      "version": "1"
    },
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A management action frame\\nshorter than that (e.g. exactly 24 bytes, the minimum a malicious\\npeer can send) causes a 1-2 byte out-of-bounds read.\\n\\nThis is reachable from rtw_cfg80211_monitor_if_xmit_entry() and\\ncfg80211_rtw_mgmt_tx() in ioctl_cfg80211.c, both of which pass\\nattacker/user-influenced frame buffers and lengths straight through.\\n\\nAdd the missing length check before frame_body is dereferenced.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/staging/rtl8723bs/core/rtw_ieee80211.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"15081ff835b29e456da29303b32efc436df04695\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"310aaa8058d19cc431aedac0f5bb814e84479393\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"1410bce22351ba15d8e58287cbf09d55d7f21fc9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"0b7f64c7bb9664777168768c6b44affb07dcbf24\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"136f9a3ab87ded8aaf081425cfb2059659dd9023\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"b041e3f35e0d262d42a711094ab594634d72744a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"a54fd1a44862d263df9f8bc17fca3620be31addb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"554c0a3abf216c991c5ebddcdb2c08689ecd290b\",\"lessThan\":\"ff917923f4fb9c83717ba135ee47d7e4c1567bb7\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/staging/rtl8723bs/core/rtw_ieee80211.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\":\"5.10.270\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.221\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.188\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.157\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.110\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.51\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.5\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc2\",\"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:L/I:N/A:H\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":4.2}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0b7f64c7bb9664777168768c6b44affb07dcbf24\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/136f9a3ab87ded8aaf081425cfb2059659dd9023\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1410bce22351ba15d8e58287cbf09d55d7f21fc9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/15081ff835b29e456da29303b32efc436df04695\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/310aaa8058d19cc431aedac0f5bb814e84479393\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a54fd1a44862d263df9f8bc17fca3620be31addb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b041e3f35e0d262d42a711094ab594634d72744a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ff917923f4fb9c83717ba135ee47d7e4c1567bb7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}



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