{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-74488", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-74488", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-08-15T12:27:18.867Z", "updatedAt": "2026-10-16T19:05:49.470Z", "importedAt": "2026-10-24T01:58:30.346Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "wifi: mwifiex: use the subframe length when parsing A-MSDU TDLS frames", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mwifiex: use the subframe length when parsing A-MSDU TDLS frames\n\nmwifiex_11n_dispatch_amsdu_pkt() splits an A-MSDU with\nieee80211_amsdu_to_8023s() and walks the resulting subframes. For each\nsubframe it passes the subframe data pointer to\nmwifiex_process_tdls_action_frame(), but pairs it with skb->len, the\nlength of the A-MSDU parent, instead of rx_skb->len:\n\n\trx_skb = __skb_dequeue(&list);\n\trx_hdr = (struct rx_packet_hdr *)rx_skb->data;\n\tif (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&\n\t ntohs(rx_hdr->eth803_hdr.h_proto) == ETH_P_TDLS) {\n\t\tmwifiex_process_tdls_action_frame(priv, (u8 *)rx_hdr,\n\t\t\t\t\t\t skb->len);\n\t}\n\nThe parent is not a valid description of that buffer, and may not be\nvalid memory at all. ieee80211_amsdu_to_8023s() ends with\n\n\tif (!reuse_skb)\n\t\tdev_kfree_skb(skb);\n\nand it only sets reuse_skb when the parent is linear, is not a\nhead_frag, and is being consumed as the *last* subframe. So when the\nparent does not qualify for reuse it has already been freed, and the\nread of skb->len is a use-after-free. When it is reused, skb->len is\nthe length of the last subframe, applied to every earlier subframe,\nwhich over-states the buffer whenever an earlier subframe is shorter.\n\nThe callee cannot absorb a wrong length, because it derives its own\nceiling from the value it is given. Each frame type computes\n\n\ties_len = len - sizeof(struct ethhdr) - TDLS_*_FIX_LEN;\n\nand the element walk is then bounded entirely against that ceiling,\n\n\tfor (end = pos + ies_len; pos + 1 < end; pos += 2 + pos[1]) {\n\t\tu8 ie_len = pos[1];\n\n\t\tif (pos + 2 + ie_len > end)\n\t\t\tbreak;\n\nso a too-large len moves end past the end of the subframe and the walk\nreads and copies beyond it. The A-MSDU layout is chosen by the sender,\nwhich makes the difference between the last subframe and a shorter\nearlier one remotely selectable. Reaching this requires TDLS support in\nfirmware and the TDLS ethertype on the subframe.\n\nThe other caller, mwifiex_process_rx_packet(), is correct: it passes a\npointer and a length that describe the same region of the RX buffer.\n\nPass rx_skb->len, the length of the subframe actually being parsed.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "776f742040ca5eb6242c60f29ac73d5752a5b621", "status": "affected", "versionType": "git", "lessThan": "707664027bb9307f7268eda403af7c4ccd9b8644" }, { "version": "776f742040ca5eb6242c60f29ac73d5752a5b621", "status": "affected", "versionType": "git", "lessThan": "3b02275833a0d3e6583627995d614fa99bdf364f" }, { "version": "776f742040ca5eb6242c60f29ac73d5752a5b621", "status": "affected", "versionType": "git", "lessThan": "a1f0f7dc7eb15754e6931b433edb7beb754c996a" }, { "version": "776f742040ca5eb6242c60f29ac73d5752a5b621", "status": "affected", "versionType": "git", "lessThan": "25e5a3fe4f15e30f74eca42cbf3bcc3a3fbeda79" }, { "version": "776f742040ca5eb6242c60f29ac73d5752a5b621", "status": "affected", "versionType": "git", "lessThan": "ece2ebb34247d573142617dfc534a9dc11ba59be" }, { "version": "776f742040ca5eb6242c60f29ac73d5752a5b621", "status": "affected", "versionType": "git", "lessThan": "c9dcfe6b8b71369e1d732e2ff622c3696a2f032c" }, { "version": "776f742040ca5eb6242c60f29ac73d5752a5b621", "status": "affected", "versionType": "git", "lessThan": "5a21ab03829cb6d2682c127f22e2b9cd63b4393f" }, { "version": "776f742040ca5eb6242c60f29ac73d5752a5b621", "status": "affected", "versionType": "git", "lessThan": "99a948382af8a225e2d5e54a7052158cd6281cc6" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "4.5", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "4.5" }, { "version": "5.10.265", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.216", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.183", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.151", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.103", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.44", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.1.8", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.1.*" }, { "version": "7.2", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }