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CVE Record

CVE-2022-49022: wifi: mac8021: fix possible oob access in ieee80211_get_rate_duration

In the Linux kernel, the following vulnerability has been resolved: wifi: mac8021: fix possible oob access in ieee80211_get_rate_duration Fix possible out-of-bound access in ieee80211_get_rate_duration routine as reported by the following UBSAN report: UBSAN: array-index-out-of-bounds in net/mac80211/airtime.c:455:47 index 15 is out of range for type 'u16 [12]' CPU: 2 PID: 217 Comm: kworker/u32:10 Not tainted 6.1.0-060100rc3-generic Hardware name: Acer Aspire TC-281/Aspire TC-281, BIOS R01-A2 07/18/2017 Workqueue: mt76 mt76u_tx_status_data [mt76_usb] Call Trace: <TASK> show_stack+0x4e/0x61 dump_stack_lvl+0x4a/0x6f dump_stack+0x10/0x18 ubsan_epilogue+0x9/0x43 __ubsan_handle_out_of_bounds.cold+0x42/0x47 ieee80211_get_rate_duration.constprop.0+0x22f/0x2a0 [mac80211] ? ieee80211_tx_status_ext+0x32e/0x640 [mac80211] ieee80211_calc_rx_airtime+0xda/0x120 [mac80211] ieee80211_calc_tx_airtime+0xb4/0x100 [mac80211] mt76x02_send_tx_status+0x266/0x480 [mt76x02_lib] mt76x02_tx_status_data+0x52/0x80 [mt76x02_lib] mt76u_tx_status_data+0x67/0xd0 [mt76_usb] process_one_work+0x225/0x400 worker_thread+0x50/0x3e0 ? process_one_work+0x400/0x400 kthread+0xe9/0x110 ? kthread_complete_and_exit+0x20/0x20 ret_from_fork+0x22/0x30

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2022-49022 is a Linux kernel Wi-Fi bug in mac80211 that can read outside an expected array while calculating airtime. The public record shows a kernel UBSAN crash report and stable fixes, but does not describe proven real-world exploitation or business impact.

Executive priority

Treat this as a kernel maintenance priority for Wi-Fi-enabled Linux assets, not an emergency based on the supplied evidence. Patch through normal security update channels and verify vendor backport status before assuming exposure.

Technical view

The flaw is an out-of-bounds array index in ieee80211_get_rate_duration in net/mac80211/airtime.c. The report shows index 15 outside a u16[12] array during mac80211 airtime calculation, with a call path involving mt76 USB transmit status handling.

Likely exposure

Exposure is most relevant to Linux systems running affected kernel versions with Wi-Fi functionality using mac80211. The bundle lists Linux kernel versions including 5.5 through fixed stable lines around 5.10.158, 5.15.82, 6.0.12, and 6.1, but distribution backports must be verified.

Exploitation context

The source bundle does not show active exploitation, public exploit availability, or KEV listing. Evidence is limited to a resolved Linux kernel defect and a UBSAN out-of-bounds report observed in a worker thread handling Wi-Fi driver status processing.

Researcher notes

The public record lacks CVSS, CWE, exploitability detail, and a clear attacker model. Analysis should stay close to the kernel fix and affected-version mapping. Do not infer remote code execution or active attacks from the supplied UBSAN report alone.

Mitigation direction

  • Install a vendor kernel update containing the referenced stable mac80211 fixes.
  • Verify whether your distribution backported the fix into its kernel package.
  • Prioritize Linux systems that use Wi-Fi, mac80211, or mt76 USB drivers.
  • Follow Linux distribution guidance if no fixed package mapping is available.

Validation and detection

  • Inventory Linux kernel versions on Wi-Fi-enabled systems.
  • Check whether installed kernels include the referenced stable commits or vendor backports.
  • Review kernel logs for UBSAN out-of-bounds reports in mac80211 airtime code.
  • Confirm regression coverage for Wi-Fi operation after kernel update.
Prepared
Confidence
medium
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2022-49022 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
1ADP providers
5Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxdb3e1c40cf2f973fbdd52ae0b59a9472b1c04f4a, db3e1c40cf2f973fbdd52ae0b59a9472b1c04f4a, db3e1c40cf2f973fbdd52ae0b59a9472b1c04f4a, db3e1c40cf2f973fbdd52ae0b59a9472b1c04f4aunaffected
LinuxLinux5.5, 0, 5.10.158, 5.15.82, 6.0.12, 6.1affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.