CVE-2026-93271: linux

CVSS: UnknownReceived
AliasesUBUNTU-CVE-2026-93271DEBIAN-CVE-2026-93271
Published 24-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-93271 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 8.8% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.20%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 1
MGASA-2026-0506OPENSUSE-SU-2026:12074-1

Timeline

  1. 24-09-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

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

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

25-09-202621-10-2026
EPSS score
0.20%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu157 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linuxAll versions (No fix recorded) | < 6.1.190-1 | < 6.12.111-1 | < 7.2.6-1
  • linux-6.12< 6.12.111-1~deb12u1
Linux1 product
  • linux≥ d5c65159f2895379e11ca13f62feabe93278985d, < 6ad04c3e2ec54bf5ec72c81afdd66318a116c539 | ≥ d5c65159f2895379e11ca13f62feabe93278985d, < a6b951f79e66fc8bd93a537ff1040fbfb567c8bf | ≥ d5c65159f2895379e11ca13f62feabe93278985d, < b77bfe6e59b98dff3ccfcf9b45fc27e3db498626 | ≥ d5c65159f2895379e11ca13f62feabe93278985d, < fb7b9a7209f839c17c66484dfdc84c9a23c6fd2f | ≥ d5c65159f2895379e11ca13f62feabe93278985d, < a0b3e6f9645d88f387c4fea546048a91952cd4cd | ≥ d5c65159f2895379e11ca13f62feabe93278985d, < 2bb2a778a487305bd378db5fd5014fbdce4ada2c | ≥ d5c65159f2895379e11ca13f62feabe93278985d, < ccbd20f2168f581d90265da1a925b9b6472a0b05 | ≥ d5c65159f2895379e11ca13f62feabe93278985d, < 12b09e478aa7459b7893a695ef77682202f2da83 | 5.6

3 vendors · 160 products

References

11 links
Show all 11 references