CVE-2026-93271wifi: ath11k: cap out-of-range rx MCS instead of leaving bogus rate
- —Not scoredno CVSS score yet
- 0.20%Exploitation in 30 daysEPSS · top 90% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: cap out-of-range rx MCS instead of leaving bogus rate ath11k can receive HT/VHT/HE frames whose reported MCS is above the maximum that can be expressed in the corresponding mac80211 rate space (e.g. an HE frame reported with MCS 12, while HE tops out at MCS 11). The frame itself is valid and decodes correctly, but for such a frame ath11k_dp_rx_h_rate() leaves rx_status->rate_idx set to the out-of-range value and never assigns rx_status->encoding, so it stays RX_ENC_LEGACY from the ath11k_dp_rx_h_ppdu() initialization. Once that frame reaches mac80211 it trips the rate sanity check and the frame is dropped with a splat: ath11k_pci 0000:03:00.0: Received with invalid mcs in HE mode 12 WARNING: CPU: 0 PID: 0 at net/mac80211/rx.c:5433 ieee80211_rx_list+0xb0a/0xe90 [mac80211] Dropping the frame would discard otherwise valid data, so instead cap the reported MCS to the maximum the rate space can express and deliver the frame. Set rx_status->encoding before the range check and assign rate_idx from the capped value, so a frame with an out-of-range MCS no longer leaves partial or bogus rate metadata behind. Also downgrade the logging level since they are not treated as invalid frames now. The only loss is that such a frame is reported as the capped MCS in the rx rate statistics. Tested-on: WCN6855 hw2.1 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.41
Timeline
ID reserved
By Linux
- 7 days later
· 7 days later
Published
- 25 days later
· 25 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.20% · top 90% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected d5c65159f2895379e11ca13f62feabe93278985d – < 6ad04c3e2ec54bf5ec72c81afdd66318a116c539
- affected d5c65159f2895379e11ca13f62feabe93278985d – < a6b951f79e66fc8bd93a537ff1040fbfb567c8bf
- affected d5c65159f2895379e11ca13f62feabe93278985d – < b77bfe6e59b98dff3ccfcf9b45fc27e3db498626
- affected d5c65159f2895379e11ca13f62feabe93278985d – < fb7b9a7209f839c17c66484dfdc84c9a23c6fd2f
- affected d5c65159f2895379e11ca13f62feabe93278985d – < a0b3e6f9645d88f387c4fea546048a91952cd4cd
- affected d5c65159f2895379e11ca13f62feabe93278985d – < 2bb2a778a487305bd378db5fd5014fbdce4ada2c
- affected d5c65159f2895379e11ca13f62feabe93278985d – < ccbd20f2168f581d90265da1a925b9b6472a0b05
- affected d5c65159f2895379e11ca13f62feabe93278985d – < 12b09e478aa7459b7893a695ef77682202f2da83
- affected 5.6
- unaffected < 5.6
- unaffected 5.10.270 – ≤ 5.10.*
- unaffected 5.15.221 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.110 – ≤ 6.12.*
- unaffected 6.18.52 – ≤ 6.18.*
- unaffected 7.2.6 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/6ad04c3e2ec54bf5ec72c81afdd66318a116c539 (opens in a new tab)
- https://git.kernel.org/stable/c/a6b951f79e66fc8bd93a537ff1040fbfb567c8bf (opens in a new tab)
- https://git.kernel.org/stable/c/b77bfe6e59b98dff3ccfcf9b45fc27e3db498626 (opens in a new tab)
- https://git.kernel.org/stable/c/fb7b9a7209f839c17c66484dfdc84c9a23c6fd2f (opens in a new tab)
- https://git.kernel.org/stable/c/a0b3e6f9645d88f387c4fea546048a91952cd4cd (opens in a new tab)
- https://git.kernel.org/stable/c/2bb2a778a487305bd378db5fd5014fbdce4ada2c (opens in a new tab)
- https://git.kernel.org/stable/c/ccbd20f2168f581d90265da1a925b9b6472a0b05 (opens in a new tab)
- https://git.kernel.org/stable/c/12b09e478aa7459b7893a695ef77682202f2da83 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-86143 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2026-93271)Record last updated .