{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-90017", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.781Z", "datePublished": "2026-09-16T10:33:22.827Z", "dateUpdated": "2026-10-19T08:56:30.908Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:56:30.908Z" }, "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 >= 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": { "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" }, "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 → on_action_public → 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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/staging/rtl8723bs/core/rtw_ieee80211.c" ], "versions": [ { "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "15081ff835b29e456da29303b32efc436df04695", "status": "affected", "versionType": "git" }, { "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "310aaa8058d19cc431aedac0f5bb814e84479393", "status": "affected", "versionType": "git" }, { "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "1410bce22351ba15d8e58287cbf09d55d7f21fc9", "status": "affected", "versionType": "git" }, { "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "0b7f64c7bb9664777168768c6b44affb07dcbf24", "status": "affected", "versionType": "git" }, { "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "136f9a3ab87ded8aaf081425cfb2059659dd9023", "status": "affected", "versionType": "git" }, { "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "b041e3f35e0d262d42a711094ab594634d72744a", "status": "affected", "versionType": "git" }, { "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "a54fd1a44862d263df9f8bc17fca3620be31addb", "status": "affected", "versionType": "git" }, { "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "ff917923f4fb9c83717ba135ee47d7e4c1567bb7", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/staging/rtl8723bs/core/rtw_ieee80211.c" ], "versions": [ { "version": "4.12", "status": "affected" }, { "version": "0", "lessThan": "4.12", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.51", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.5", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.10.270" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.15.221" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.1.188" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.6.157" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.12.110" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.18.51" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.2.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/15081ff835b29e456da29303b32efc436df04695" }, { "url": "https://git.kernel.org/stable/c/310aaa8058d19cc431aedac0f5bb814e84479393" }, { "url": "https://git.kernel.org/stable/c/1410bce22351ba15d8e58287cbf09d55d7f21fc9" }, { "url": "https://git.kernel.org/stable/c/0b7f64c7bb9664777168768c6b44affb07dcbf24" }, { "url": "https://git.kernel.org/stable/c/136f9a3ab87ded8aaf081425cfb2059659dd9023" }, { "url": "https://git.kernel.org/stable/c/b041e3f35e0d262d42a711094ab594634d72744a" }, { "url": "https://git.kernel.org/stable/c/a54fd1a44862d263df9f8bc17fca3620be31addb" }, { "url": "https://git.kernel.org/stable/c/ff917923f4fb9c83717ba135ee47d7e4c1567bb7" } ], "title": "staging: rtl8723bs: fix OOB read in rtw_action_frame_parse()", "x_generator": { "engine": "bippy-1.2.0" } } } }