{"id":"CVE-2025-71100","state":"PUBLISHED","title":"wifi: rtlwifi: 8192cu: fix tid out of range in rtl92cu_tx_fill_desc()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtlwifi: 8192cu: fix tid out of range in rtl92cu_tx_fill_desc()\n\nTID getting from ieee80211_get_tid() might be out of range of array size\nof sta_entry->tids[], so check TID is less than MAX_TID_COUNT. Othwerwise,\nUBSAN warn:\n\n UBSAN: array-index-out-of-bounds in drivers/net/wireless/realtek/rtlwifi/rtl8192cu/trx.c:514:30\n index 10 is out of range for type 'rtl_tid_data [9]'","publishedAt":"2026-01-13T15:34:59.039Z","updatedAt":"2026-10-19T18:15:13.194Z","severity":{"score":7.6,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8ca4cdef93297c9b9bf08da39bc940bd20acbb94","status":"affected","lessThan":"9765d6eb8298b07d499cdf9ef7c237d3540102d6","versionType":"git"},{"version":"8ca4cdef93297c9b9bf08da39bc940bd20acbb94","status":"affected","lessThan":"90a15ff324645aa806d81fa349497cd964861b66","versionType":"git"},{"version":"8ca4cdef93297c9b9bf08da39bc940bd20acbb94","status":"affected","lessThan":"dd39edb445f07400e748da967a07d5dca5c5f96e","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/realtek/rtlwifi/rtl8192cu/trx.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.9","versionType":"semver"},{"version":"6.12.64","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.4","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/realtek/rtlwifi/rtl8192cu/trx.c"]}],"references":["https://git.kernel.org/stable/c/9765d6eb8298b07d499cdf9ef7c237d3540102d6","https://git.kernel.org/stable/c/90a15ff324645aa806d81fa349497cd964861b66","https://git.kernel.org/stable/c/dd39edb445f07400e748da967a07d5dca5c5f96e"],"weaknesses":["CWE-125"],"ingestedAt":"2026-10-29T20:10:04.440Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/71xxx/CVE-2025-71100.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-71100","state":"PUBLISHED","datePublished":"2026-01-13T15:34:59.039Z","dateUpdated":"2026-10-19T18:15:13.194Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-01-13T15:30:19.651Z"},"containers":{"cna":{"title":"wifi: rtlwifi: 8192cu: fix tid out of range in rtl92cu_tx_fill_desc()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtlwifi: 8192cu: fix tid out of range in rtl92cu_tx_fill_desc()\n\nTID getting from ieee80211_get_tid() might be out of range of array size\nof sta_entry->tids[], so check TID is less than MAX_TID_COUNT. Othwerwise,\nUBSAN warn:\n\n UBSAN: array-index-out-of-bounds in drivers/net/wireless/realtek/rtlwifi/rtl8192cu/trx.c:514:30\n index 10 is out of range for type 'rtl_tid_data [9]'"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8ca4cdef93297c9b9bf08da39bc940bd20acbb94","status":"affected","lessThan":"9765d6eb8298b07d499cdf9ef7c237d3540102d6","versionType":"git"},{"version":"8ca4cdef93297c9b9bf08da39bc940bd20acbb94","status":"affected","lessThan":"90a15ff324645aa806d81fa349497cd964861b66","versionType":"git"},{"version":"8ca4cdef93297c9b9bf08da39bc940bd20acbb94","status":"affected","lessThan":"dd39edb445f07400e748da967a07d5dca5c5f96e","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/realtek/rtlwifi/rtl8192cu/trx.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.9","versionType":"semver"},{"version":"6.12.64","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.4","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/realtek/rtlwifi/rtl8192cu/trx.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/9765d6eb8298b07d499cdf9ef7c237d3540102d6"},{"url":"https://git.kernel.org/stable/c/90a15ff324645aa806d81fa349497cd964861b66"},{"url":"https://git.kernel.org/stable/c/dd39edb445f07400e748da967a07d5dca5c5f96e"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H","baseScore":7.6,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:A - An adjacent Wi-Fi peer can trigger automatic open-mesh peering responses whose category 15 is misinterpreted as a TID, reaching rtl92cu_tx_fill_desc() over the wireless link.\nAC:L - A valid peering-open frame deterministically triggers the vulnerable transmit path; no race or condition outside the attacker's control is required.\nPR:N - The open-mesh path accepts self-protected peering frames from unknown peers and automatically creates an authorized station entry, requiring no credentials or local capabilities.\nUI:N - Once the affected wireless interface is operating, mac80211 processes the attacker's frame and transmits the vulnerable response automatically.\nS:U - The access and resulting effects remain within the host kernel and wireless device security authority, without crossing a virtualization or isolation boundary.\nC:L - The access reads one byte at one of a small number of TID-selected offsets, with TIDs 10 through 15 reaching beyond the tail-allocated driver data; conservatively, this permits only a tightly bounded heap-state oracle rather than arbitrary memory disclosure.\nI:L - The operation cannot overwrite kernel memory or provide an arbitrary-write primitive, but the fetched byte can influence aggregation and RTS descriptor state, supporting limited transmission integrity impact.\nA:H - UBSAN trap or panic-on-warning kernels can oops or panic on the deterministic bounds violation, and an adjacent peer can retrigger it after recovery."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T12:12:05.756Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.12.64"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.18.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.19"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2025-71100","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-10-16T15:05:46.666699Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","lang":"en","type":"CWE","description":"CWE-125 Out-of-bounds Read"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T18:15:13.194Z"}}]}}}