CVE-2024-26897

MEDIUM
Published Apr 17, 2024 Modified May 12, 2026 CWE-362

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: ath9k: delay all of ath9k_wmi_event_tasklet() until init is complete The ath9k_wmi_event_tasklet() used in ath9k_htc assumes that all the data structures have been fully initialised by the time it runs. However, because of the order in which things are initialised, this is not guaranteed to be the case, because the device is exposed to the USB subsystem before the ath9k driver initialisation is completed. We already committed a partial fix for this in commit: 8b3046abc99e ("ath9k_htc: fix NULL pointer dereference at ath9k_htc_tx_get_packet()") However, that commit only aborted the WMI_TXSTATUS_EVENTID command in the event tasklet, pairing it with an "initialisation complete" bit in the TX struct. It seems syzbot managed to trigger the race for one of the other commands as well, so let's just move the existing synchronisation bit to cover the whole tasklet (setting it at the end of ath9k_htc_probe_device() instead of inside ath9k_tx_init()).

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CVSS v3.1 Score

4.7
MEDIUM
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-362 CWE-362

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
debian debian_linux

References

Advisories & Patches

https://git.kernel.org/stable/c/1bc5461a21c56a36e2a7d81e152b90ce019a3905 https://git.kernel.org/stable/c/24355fcb0d4cbcb6ddda262596558e8cfba70f11 https://git.kernel.org/stable/c/4afa0246656d5680c8a4c3fb37ba6570c4ab819b https://git.kernel.org/stable/c/74d0639261dd795dce958d1b14815bdcbb48a715 https://git.kernel.org/stable/c/a015fbf698c8957aa5fbeefc5c59dd2cf3107298 https://git.kernel.org/stable/c/ac90e22e735bac44f74b5161fb096fbeb0ff8bc2 https://git.kernel.org/stable/c/f8ff4b4df71e87f609be0cc37d92e918107f9b90 https://git.kernel.org/stable/c/1bc5461a21c56a36e2a7d81e152b90ce019a3905 https://git.kernel.org/stable/c/24355fcb0d4cbcb6ddda262596558e8cfba70f11 https://git.kernel.org/stable/c/4afa0246656d5680c8a4c3fb37ba6570c4ab819b https://git.kernel.org/stable/c/74d0639261dd795dce958d1b14815bdcbb48a715 https://git.kernel.org/stable/c/a015fbf698c8957aa5fbeefc5c59dd2cf3107298 https://git.kernel.org/stable/c/ac90e22e735bac44f74b5161fb096fbeb0ff8bc2 https://git.kernel.org/stable/c/f8ff4b4df71e87f609be0cc37d92e918107f9b90

Frequently Asked Questions

What is CVE-2024-26897? +
In the Linux kernel, the following vulnerability has been resolved: wifi: ath9k: delay all of ath9k_wmi_event_tasklet() until init is complete The ath9k_wmi_event_tasklet() used in ath9k_htc assumes that all the data structures have been fully initialised by the time it runs. However, because of the order in which things are initialised, this is not guaranteed to be the case, because the device is exposed to the USB subsystem before the ath9k driver initialisation is completed. We already committed a partial fix for this in commit: 8b3046abc99e ("ath9k_htc: fix NULL pointer dereference at ath9k_htc_tx_get_packet()") However, that commit only aborted the WMI_TXSTATUS_EVENTID command in the event tasklet, pairing it with an "initialisation complete" bit in the TX struct. It seems syzbot managed to trigger the race for one of the other commands as well, so let's just move the existing synchronisation bit to cover the whole tasklet (setting it at the end of ath9k_htc_probe_device() instead of inside ath9k_tx_init()). It has a CVSS v3.1 base score of 4.7 (MEDIUM).
How severe is CVE-2024-26897? +
CVE-2024-26897 has a CVSS v3.1 score of 4.7 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2024-26897? +
CVE-2024-26897 affects products from debian, linux, specifically: debian_linux, linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-26897? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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