{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64445", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.788Z", "datePublished": "2026-07-25T08:51:16.670Z", "dateUpdated": "2026-08-05T12:42:09.684Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:42:09.684Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix WEP length underflow and OOB read in OnAuth()\n\nOnAuth() has two bugs in the shared-key authentication path.\n\nWhen the Privacy bit is set, rtw_wep_decrypt() is called without\nverifying that the frame is long enough to contain a valid WEP IV and\nICV. Inside rtw_wep_decrypt(), length is computed as:\n\n length = len - WLAN_HDR_A3_LEN - iv_len\n\nand then passed as (length - 4) to crc32_le(). If len is less than\nWLAN_HDR_A3_LEN + iv_len + icv_len (32 bytes), length - 4 is negative\nand, after the implicit cast to size_t, causes crc32_le() to read far\nbeyond the frame buffer. Add a minimum length check before accessing\nthe IV field and calling the decryption path.\n\nWhen processing a seq=3 response, rtw_get_ie() stores the Challenge\nText IE length in ie_len, but the subsequent memcmp() always reads 128\nbytes regardless of ie_len. IEEE 802.11 mandates a challenge text of\nexactly 128 bytes; reject any IE whose length field differs, matching\nthe check already applied to OnAuthClient()."}], "metrics": [{"cvssV3_1": {"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"}, "scenarios": [{"lang": "en", "value": "AV:A - A nearby attacker can inject crafted 802.11 authentication management frames over the wireless channel to an RTL8723BS interface operating in AP mode.\nAC:L - A single attacker-controlled protected authentication frame can trigger the underflow without knowing a WEP key, winning a race, or satisfying conditions outside the attacker's control.\nPR:N - The vulnerable decryption executes before authentication, association, MAC ACL enforcement, and authentication-algorithm validation, so no credentials or privileges are required.\nUI:N - Once the affected interface is operating normally in AP mode, exploitation requires no action by a victim user.\nS:U - The vulnerable driver and the affected kernel resources belong to the same operating-system security authority; this is not a guest-host or other scope-boundary escape.\nC:H - The CRC underflow supplies a near-SIZE_MAX length to crc32_le(), producing a massive kernel out-of-bounds read, while the short-IE comparison can read up to 127 bytes beyond the Challenge Text IE.\nI:H - For protected frames shorter than 28 bytes, the negative signed length is converted to an approximately 4-GiB unsigned length for the in-place arc4_crypt(), causing extensive out-of-bounds writes capable of corrupting adjacent kernel heap state.\nA:H - The enormous ARC4 operation or CRC read will cross the receive-buffer allocation and can cause an oops, panic, hang, or severe heap corruption; unauthenticated attackers can trigger this repeatedly."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": 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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/staging/rtl8723bs/core/rtw_mlme_ext.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "665e1ecb68b4e8419604e70a33f02d1c8b0222c6", "status": "affected", "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "versionType": "git"}, {"lessThan": "87cccc2a767f17dcab71e3b9fe5ae29b5516c5ce", "status": "affected", "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "versionType": "git"}, {"lessThan": "c9000c93078e5c0a5a651b077c0ec92a4bc7d580", "status": "affected", "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "versionType": "git"}, {"lessThan": "1f6c9d255bdda41216b6e34c96aa2b1abee0bb84", "status": "affected", "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "versionType": "git"}, {"lessThan": "3e44a7665f3abd320a80d9c64ee4a93317041b8b", "status": "affected", "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "versionType": "git"}, {"lessThan": "64ec4192d9c10e96922245d4a6747304cc76b19d", "status": "affected", "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "versionType": "git"}, {"lessThan": "d90b9f39f375c9826ef145605dfe97765d0ecb91", "status": "affected", "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "versionType": "git"}, {"lessThan": "a1fc19d61f661d47204f095b593de507884849f7", "status": "affected", "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/staging/rtl8723bs/core/rtw_mlme_ext.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.12"}, {"lessThan": "4.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.261", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.212", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.178", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.96", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.39", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2-rc3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix WEP length underflow and OOB read in OnAuth()\n\nOnAuth() has two bugs in the shared-key authentication path.\n\nWhen the Privacy bit is set, rtw_wep_decrypt() is called without\nverifying that the frame is long enough to contain a valid WEP IV and\nICV. Inside rtw_wep_decrypt(), length is computed as:\n\n length = len - WLAN_HDR_A3_LEN - iv_len\n\nand then passed as (length - 4) to crc32_le(). If len is less than\nWLAN_HDR_A3_LEN + iv_len + icv_len (32 bytes), length - 4 is negative\nand, after the implicit cast to size_t, causes crc32_le() to read far\nbeyond the frame buffer. Add a minimum length check before accessing\nthe IV field and calling the decryption path.\n\nWhen processing a seq=3 response, rtw_get_ie() stores the Challenge\nText IE length in ie_len, but the subsequent memcmp() always reads 128\nbytes regardless of ie_len. IEEE 802.11 mandates a challenge text of\nexactly 128 bytes; reject any IE whose length field differs, matching\nthe check already applied to OnAuthClient()."}], "id": "CVE-2026-64445", "lastModified": "2026-08-11T15:01:50.637", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-07-25T10:17:29.177", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1f6c9d255bdda41216b6e34c96aa2b1abee0bb84"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3e44a7665f3abd320a80d9c64ee4a93317041b8b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/64ec4192d9c10e96922245d4a6747304cc76b19d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/665e1ecb68b4e8419604e70a33f02d1c8b0222c6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/87cccc2a767f17dcab71e3b9fe5ae29b5516c5ce"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a1fc19d61f661d47204f095b593de507884849f7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c9000c93078e5c0a5a651b077c0ec92a4bc7d580"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d90b9f39f375c9826ef145605dfe97765d0ecb91"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: staging: rtl8723bs: fix WEP length underflow and OOB read in OnAuth()", "id": "2507168", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507168"}, "csaw": false, "cwe": "CWE-125", "details": ["A flaw was found in the `rtl8723bs` Wi-Fi driver within the Linux kernel. During shared-key authentication, an attacker on an adjacent network could send a specially crafted frame. This could lead to an out-of-bounds read, potentially allowing for the disclosure of sensitive information or causing a denial of service (DoS)."], "name": "CVE-2026-64445", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "impact": "important", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "impact": "important", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "impact": "important", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "impact": "important", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "impact": "important", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "impact": "important", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "impact": "important", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "impact": "important", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "impact": "important", "package_name": "erlang27", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-07-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64445\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64445\nhttps://lore.kernel.org/linux-cve-announce/2026072539-CVE-2026-64445-2324@gregkh/T"]}

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