Race Condition Affecting perf package, versions <0:4.18.0-553.5.1.el8_10
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Test your applications- Snyk ID SNYK-RHEL8-PERF-6661080
- published 27 Apr 2024
- disclosed 17 Apr 2024
Introduced: 17 Apr 2024
CVE-2024-26897 Open this link in a new tabHow to fix?
Upgrade RHEL:8 perf to version 0:4.18.0-553.5.1.el8_10 or higher.
This issue was patched in RHSA-2024:3618.
NVD Description
Note: Versions mentioned in the description apply only to the upstream perf package and not the perf package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
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()).
References
- https://access.redhat.com/security/cve/CVE-2024-26897
- 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://lists.debian.org/debian-lts-announce/2024/06/msg00017.html