CVE-2026-68362

wifi: ath11k: fix NULL pointer dereference in ath11k_hal_srng_access_begin

State: Published
Severity: Not scored
Published: Aug 10, 2026
Updated: Aug 19, 2026
Reserved: Jul 30, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

wifi: ath11k: fix NULL pointer dereference in ath11k_hal_srng_access_begin

In ATH11K_QMI_EVENT_FW_READY, ATH11K_FLAG_REGISTERED is set unconditionally even when ath11k_core_qmi_firmware_ready() fails. This leaves the driver in an inconsistent state where initialization is considered complete although the firmware ready handling did not finish successfully. During the subsequent SSR, the driver enters the restart path based on this incorrect state and dereferences uninitialized srng members, resulting in a NULL pointer dereference.

Call trace: ath11k_hal_srng_access_begin+0xc/0x60 [ath11k] (P) ath11k_ce_cleanup_pipes+0x17c/0x180 [ath11k] ath11k_core_restart+0x40/0x168 [ath11k]

Fix this by: - skipping firmware_ready if ATH11K_FLAG_REGISTERED is already set - setting ATH11K_FLAG_REGISTERED only when firmware_ready succeeds - setting ATH11K_FLAG_QMI_FAIL and aborting the FW_READY handling on error

Tested-on: WCN6750 hw1.0 AHB WLAN.MSL.2.0.c2-00204-QCAMSLSWPLZ-1

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	6fe62a8cec51c756159c71be35a16b2cc8cbd4c0 to before 66bf998b18334ca97321433e4ab783b6ff267e9dAffected 6fe62a8cec51c756159c71be35a16b2cc8cbd4c0 to before e517e207300edcf7f3a8f6c45f9155c0e419ffb9Affected 6fe62a8cec51c756159c71be35a16b2cc8cbd4c0 to before d6bba659ac30d862ee7bab92862cd6e514f07521Affected 6fe62a8cec51c756159c71be35a16b2cc8cbd4c0 to before e5394605f9a985cc3a8263e610ba84b33cbe7b0cAffected 6fe62a8cec51c756159c71be35a16b2cc8cbd4c0 to before 4abb4e284d8897176e91d7a3168ee29ed876bb41Affected 6fe62a8cec51c756159c71be35a16b2cc8cbd4c0 to before e8d85672dd7e2523f774caafba8f858384e18df7Affected
LinuxLinux	6.1Affected before 6.1Not affected 6.1.183 through 6.1.Not affected 6.6.148 through 6.6.Not affected 6.12.101 through 6.12.Not affected 6.18.42 through 6.18.Not affected 7.1.6 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

6fe62a8cec51c756159c71be35a16b2cc8cbd4c0 to before 66bf998b18334ca97321433e4ab783b6ff267e9dAffected
6fe62a8cec51c756159c71be35a16b2cc8cbd4c0 to before e517e207300edcf7f3a8f6c45f9155c0e419ffb9Affected
6fe62a8cec51c756159c71be35a16b2cc8cbd4c0 to before d6bba659ac30d862ee7bab92862cd6e514f07521Affected
6fe62a8cec51c756159c71be35a16b2cc8cbd4c0 to before e5394605f9a985cc3a8263e610ba84b33cbe7b0cAffected
6fe62a8cec51c756159c71be35a16b2cc8cbd4c0 to before 4abb4e284d8897176e91d7a3168ee29ed876bb41Affected
6fe62a8cec51c756159c71be35a16b2cc8cbd4c0 to before e8d85672dd7e2523f774caafba8f858384e18df7Affected

LinuxLinux

6.1Affected
before 6.1Not affected
6.1.183 through 6.1.*Not affected
6.6.148 through 6.6.*Not affected
6.12.101 through 6.12.*Not affected
6.18.42 through 6.18.*Not affected
7.1.6 through 7.1.*Not affected
7.2 and laterNot affected

References

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