{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-71234","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-02-18T14:25:13.845Z","datePublished":"2026-02-18T14:53:18.893Z","dateUpdated":"2026-08-05T12:12:34.848Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T12:12:34.848Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtl8xxxu: fix slab-out-of-bounds in rtl8xxxu_sta_add\n\nThe driver does not set hw->sta_data_size, which causes mac80211 to\nallocate insufficient space for driver private station data in\n__sta_info_alloc(). When rtl8xxxu_sta_add() accesses members of\nstruct rtl8xxxu_sta_info through sta->drv_priv, this results in a\nslab-out-of-bounds write.\n\nKASAN report on RISC-V (VisionFive 2) with RTL8192EU adapter:\n\n  BUG: KASAN: slab-out-of-bounds in rtl8xxxu_sta_add+0x31c/0x346\n  Write of size 8 at addr ffffffd6d3e9ae88 by task kworker/u16:0/12\n\nSet hw->sta_data_size to sizeof(struct rtl8xxxu_sta_info) during\nprobe, similar to how hw->vif_data_size is configured. This ensures\nmac80211 allocates sufficient space for the driver's per-station\nprivate data.\n\nTested on StarFive VisionFive 2 v1.2A board."}],"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 radio peer can trigger the vulnerable station transition through ordinary Wi-Fi authentication and association management frames sent to an rtl8xxxu-backed AP. Radio proximity makes this Adjacent rather than Network.\nAC:L - The out-of-bounds writes occur deterministically whenever a station transitions from authenticated to associated; no race or condition outside the attacker’s control is required. Associations can be repeated using attacker-controlled MAC addresses.\nPR:N - The AP transitions a peer to associated before controlled-port authorization and WPA credential verification ([hostapd source](https://android.googlesource.com/platform/external/wpa_suppl icant_8/%2B/2907c8a9c2e7485086db5b9dc02fe96c5c76ffa8/src/ap/ieee802_ 11.c)). A nearby unauthenticated peer therefore needs no privileges.\nUI:N - An already-running AP processes authentication and association attempts automatically. No victim user must approve or open anything.\nS:U - Exploitation compromises the kernel and resources governed by that same host security authority. It does not inherently cross a VM, IOMMU, or comparable security boundary.\nC:H - The repeated heap out-of-bounds corruption can potentially be developed into kernel code execution and arbitrary memory disclosure. Applying the required higher-severity choice makes confidentiality High.\nI:H - The driver performs a confirmed eight-byte slab out-of-bounds write plus additional out-of-bounds byte writes, with subsequent RSSI-driven updates. This memory corruption can potentially corrupt heap state and hijack kernel control flow.\nA:H - The confirmed slab violation can produce an oops or panic, particularly with memory-safety instrumentation, and association attempts can be repeated remotely. Kernel memory corruption therefore has High availability impact."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/realtek/rtl8xxxu/core.c"],"versions":[{"version":"eef55f1545c92c7181d5083453dee1296298ad3e","lessThan":"5d810ba377eddee95d30766d360a14efbb3d1872","status":"affected","versionType":"git"},{"version":"eef55f1545c92c7181d5083453dee1296298ad3e","lessThan":"116f7bd8160c6b37d1c6939385abf90f6f6ed2f5","status":"affected","versionType":"git"},{"version":"eef55f1545c92c7181d5083453dee1296298ad3e","lessThan":"9a0f3fa6ecd0c9c32dbc367a57482bbf7c7d25bf","status":"affected","versionType":"git"},{"version":"eef55f1545c92c7181d5083453dee1296298ad3e","lessThan":"86c946bcc00f6390ef65e9614ae60a9377e454f8","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/net/wireless/realtek/rtl8xxxu/core.c"],"versions":[{"version":"6.9","status":"affected"},{"version":"0","lessThan":"6.9","status":"unaffected","versionType":"semver"},{"version":"6.12.72","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.11","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.1","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","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":"6.9","versionEndExcluding":"6.12.72"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.18.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.19.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"7.0"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/5d810ba377eddee95d30766d360a14efbb3d1872"},{"url":"https://git.kernel.org/stable/c/116f7bd8160c6b37d1c6939385abf90f6f6ed2f5"},{"url":"https://git.kernel.org/stable/c/9a0f3fa6ecd0c9c32dbc367a57482bbf7c7d25bf"},{"url":"https://git.kernel.org/stable/c/86c946bcc00f6390ef65e9614ae60a9377e454f8"}],"title":"wifi: rtl8xxxu: fix slab-out-of-bounds in rtl8xxxu_sta_add","x_generator":{"engine":"bippy-1.2.0"}}}}