CVE-2025-71100: wifi: rtlwifi: 8192cu: fix tid out of range in rtl92cu_tx_fill_desc()
Vulnerability summary
CVE-2025-71100 is a high (CVSS 7.8) Improper Validation of Array Index vulnerability in linux. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 9.1% of scored vulnerabilities.
Not severe (CVSS 7.6, adjacent network); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 18 · Related 18Timeline
- 13-01-2026PublishedVulnerability first disclosed.
- 19-10-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: wifi: rtlwifi: 8192cu: fix tid out of range in rtl92cu_tx_fill_desc() TID getting from ieee80211_get_tid() might be out of range of array size of sta_entry->tids[], so check TID is less than MAX_TID_COUNT. Othwerwise, UBSAN warn: UBSAN: array-index-out-of-bounds in drivers/net/wireless/realtek/rtlwifi/rtl8192cu/trx.c:514:30 index 10 is out of range for type 'rtl_tid_data [9]'
CVSS metrics
4 scores · 4 sources · 1 version- CVE.orgCNA7.6HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:HDiffers
- OSV · UbuntuEcosystem advisory · calculated7.6HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:HDiffers
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.19%
Chance of exploitation in the next 30 days
Percentile
9%
Versus all other CVEs
30-day change
Increase +0.01 pp
From 0.19% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-129Improper Validation of Array IndexThe product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.
- CWE-125Out-of-bounds ReadThe product reads data past the end, or before the beginning, of the intended buffer.
Affected systems
Known conditions: adjacent network, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu107 products
- linux< 6.17.0-22.22
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 6.17.0-1012.12
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 8ca4cdef93297c9b9bf08da39bc940bd20acbb94, < 9765d6eb8298b07d499cdf9ef7c237d3540102d6 | ≥ 8ca4cdef93297c9b9bf08da39bc940bd20acbb94, < 90a15ff324645aa806d81fa349497cd964861b66 | ≥ 8ca4cdef93297c9b9bf08da39bc940bd20acbb94, < dd39edb445f07400e748da967a07d5dca5c5f96e | 6.9
- linux_kernelEOL≥ 6.9.1, < 6.12.64 | ≥ 6.13, < 6.18.4 | 6.9 | 6.19:rc1 | 6.19:rc2 | 6.19:rc3 | 6.19:rc4 | 6.19:rc5 | 6.19:rc6 | 6.19:rc7 | 6.19:rc8
Debian1 product
- linux< 6.12.69-1 | < 6.18.5-1
3 vendors · 110 products
