{"api_version":"1","generated_at":"2026-08-22T21:53:00+00:00","cve":"CVE-2026-74649","urls":{"html":"https://cve.report/CVE-2026-74649","api":"https://cve.report/api/cve/CVE-2026-74649.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74649","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74649"},"summary":{"title":"staging: rtl8723bs: fix missing shared-key auth challenge length check","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix missing shared-key auth challenge length check\n\nThe WEP shared-key authentication handler uses the challenge-text\nelement's attacker-controlled length without checking it against the\nfixed 128-byte chg_txt buffer.\n\nIn OnAuthClient() the length from rtw_get_ie() - up to 255 - is used\nto perform memcpy() into the 128-byte pmlmeinfo->chg_txt, so a\nmalicious AP sending a malformed WLAN_EID_CHALLENGE element can\noverflow/underfill chg_txt by up to 127 bytes. It is reachable over the\nair, before association, during shared-key authentication. In the case\nof an overflow, the driver can write out of bounds. In the case of an\nunderfill, the driver can echo stale buffer memory.\n\nThe challenge text is defined to be exactly 128 octets, which is\nalready provided as the WLAN_AUTH_CHALLENGE_LEN define; require the\nelement to be exactly that length before use.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-22 16:16:38","updated_at":"2026-08-22 16:16:38"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/87c2f073d2aaea041d531b8e579c47570b54b3b7","name":"https://git.kernel.org/stable/c/87c2f073d2aaea041d531b8e579c47570b54b3b7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a28a4b0592e4a37ea471bc0d308513a93133ce7e","name":"https://git.kernel.org/stable/c/a28a4b0592e4a37ea471bc0d308513a93133ce7e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6235b5156b48ed5d1ce3410d8f0b2fd67d30d944","name":"https://git.kernel.org/stable/c/6235b5156b48ed5d1ce3410d8f0b2fd67d30d944","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/39ae1033071001af9bb4573ebdbb43bbbe88f749","name":"https://git.kernel.org/stable/c/39ae1033071001af9bb4573ebdbb43bbbe88f749","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4d018e7d7d908bdfcb5ecfa922b1d5cb9ddb3722","name":"https://git.kernel.org/stable/c/4d018e7d7d908bdfcb5ecfa922b1d5cb9ddb3722","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4ba402fd47009d20e51dbfc934abb562098ea35b","name":"https://git.kernel.org/stable/c/4ba402fd47009d20e51dbfc934abb562098ea35b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2c56ef658ac8c6bca36bc5574715e8f717207c6c","name":"https://git.kernel.org/stable/c/2c56ef658ac8c6bca36bc5574715e8f717207c6c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74649","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74649","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b 39ae1033071001af9bb4573ebdbb43bbbe88f749 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b 4d018e7d7d908bdfcb5ecfa922b1d5cb9ddb3722 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b 4ba402fd47009d20e51dbfc934abb562098ea35b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b 87c2f073d2aaea041d531b8e579c47570b54b3b7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b a28a4b0592e4a37ea471bc0d308513a93133ce7e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b 6235b5156b48ed5d1ce3410d8f0b2fd67d30d944 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b 2c56ef658ac8c6bca36bc5574715e8f717207c6c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.12","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.12 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.216 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.183 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.152 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.104 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.45 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.9 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"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":"39ae1033071001af9bb4573ebdbb43bbbe88f749","status":"affected","version":"554c0a3abf216c991c5ebddcdb2c08689ecd290b","versionType":"git"},{"lessThan":"4d018e7d7d908bdfcb5ecfa922b1d5cb9ddb3722","status":"affected","version":"554c0a3abf216c991c5ebddcdb2c08689ecd290b","versionType":"git"},{"lessThan":"4ba402fd47009d20e51dbfc934abb562098ea35b","status":"affected","version":"554c0a3abf216c991c5ebddcdb2c08689ecd290b","versionType":"git"},{"lessThan":"87c2f073d2aaea041d531b8e579c47570b54b3b7","status":"affected","version":"554c0a3abf216c991c5ebddcdb2c08689ecd290b","versionType":"git"},{"lessThan":"a28a4b0592e4a37ea471bc0d308513a93133ce7e","status":"affected","version":"554c0a3abf216c991c5ebddcdb2c08689ecd290b","versionType":"git"},{"lessThan":"6235b5156b48ed5d1ce3410d8f0b2fd67d30d944","status":"affected","version":"554c0a3abf216c991c5ebddcdb2c08689ecd290b","versionType":"git"},{"lessThan":"2c56ef658ac8c6bca36bc5574715e8f717207c6c","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":"5.15.*","status":"unaffected","version":"5.15.216","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.183","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.152","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.104","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.45","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.216","versionStartIncluding":"4.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.183","versionStartIncluding":"4.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.152","versionStartIncluding":"4.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.104","versionStartIncluding":"4.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.45","versionStartIncluding":"4.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.9","versionStartIncluding":"4.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","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 missing shared-key auth challenge length check\n\nThe WEP shared-key authentication handler uses the challenge-text\nelement's attacker-controlled length without checking it against the\nfixed 128-byte chg_txt buffer.\n\nIn OnAuthClient() the length from rtw_get_ie() - up to 255 - is used\nto perform memcpy() into the 128-byte pmlmeinfo->chg_txt, so a\nmalicious AP sending a malformed WLAN_EID_CHALLENGE element can\noverflow/underfill chg_txt by up to 127 bytes. It is reachable over the\nair, before association, during shared-key authentication. In the case\nof an overflow, the driver can write out of bounds. In the case of an\nunderfill, the driver can echo stale buffer memory.\n\nThe challenge text is defined to be exactly 128 octets, which is\nalready provided as the WLAN_AUTH_CHALLENGE_LEN define; require the\nelement to be exactly that length before use."}],"providerMetadata":{"dateUpdated":"2026-08-22T15:32:25.601Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/39ae1033071001af9bb4573ebdbb43bbbe88f749"},{"url":"https://git.kernel.org/stable/c/4d018e7d7d908bdfcb5ecfa922b1d5cb9ddb3722"},{"url":"https://git.kernel.org/stable/c/4ba402fd47009d20e51dbfc934abb562098ea35b"},{"url":"https://git.kernel.org/stable/c/87c2f073d2aaea041d531b8e579c47570b54b3b7"},{"url":"https://git.kernel.org/stable/c/a28a4b0592e4a37ea471bc0d308513a93133ce7e"},{"url":"https://git.kernel.org/stable/c/6235b5156b48ed5d1ce3410d8f0b2fd67d30d944"},{"url":"https://git.kernel.org/stable/c/2c56ef658ac8c6bca36bc5574715e8f717207c6c"}],"title":"staging: rtl8723bs: fix missing shared-key auth challenge length check","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74649","datePublished":"2026-08-22T15:32:25.601Z","dateReserved":"2026-08-15T05:44:03.923Z","dateUpdated":"2026-08-22T15:32:25.601Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-22 16:16:38","lastModifiedDate":"2026-08-22 16:16:38","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74649","Ordinal":"1","Title":"staging: rtl8723bs: fix missing shared-key auth challenge length","CVE":"CVE-2026-74649","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74649","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix missing shared-key auth challenge length check\n\nThe WEP shared-key authentication handler uses the challenge-text\nelement's attacker-controlled length without checking it against the\nfixed 128-byte chg_txt buffer.\n\nIn OnAuthClient() the length from rtw_get_ie() - up to 255 - is used\nto perform memcpy() into the 128-byte pmlmeinfo->chg_txt, so a\nmalicious AP sending a malformed WLAN_EID_CHALLENGE element can\noverflow/underfill chg_txt by up to 127 bytes. It is reachable over the\nair, before association, during shared-key authentication. In the case\nof an overflow, the driver can write out of bounds. In the case of an\nunderfill, the driver can echo stale buffer memory.\n\nThe challenge text is defined to be exactly 128 octets, which is\nalready provided as the WLAN_AUTH_CHALLENGE_LEN define; require the\nelement to be exactly that length before use.","Type":"Description","Title":"staging: rtl8723bs: fix missing shared-key auth challenge length"}]}}}