wifi: ath11k: fix NULL pointer dereference in ath11k_hal_srng_access_begin

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-68362
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-10 13:20:28 UTC
Updated2026-08-10 13:20:28 UTC
DescriptionIn 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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 6fe62a8cec51c756159c71be35a16b2cc8cbd4c0 e517e207300edcf7f3a8f6c45f9155c0e419ffb9 git Not specified
CNA Linux Linux affected 6fe62a8cec51c756159c71be35a16b2cc8cbd4c0 d6bba659ac30d862ee7bab92862cd6e514f07521 git Not specified
CNA Linux Linux affected 6fe62a8cec51c756159c71be35a16b2cc8cbd4c0 e5394605f9a985cc3a8263e610ba84b33cbe7b0c git Not specified
CNA Linux Linux affected 6fe62a8cec51c756159c71be35a16b2cc8cbd4c0 4abb4e284d8897176e91d7a3168ee29ed876bb41 git Not specified
CNA Linux Linux affected 6fe62a8cec51c756159c71be35a16b2cc8cbd4c0 e8d85672dd7e2523f774caafba8f858384e18df7 git Not specified
CNA Linux Linux affected 6.1 Not specified
CNA Linux Linux unaffected 6.1 semver Not specified
CNA Linux Linux unaffected 6.6.148 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.101 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.42 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.6 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc5 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/e517e207300edcf7f3a8f6c45f9155c0e419ffb9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e8d85672dd7e2523f774caafba8f858384e18df7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e5394605f9a985cc3a8263e610ba84b33cbe7b0c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d6bba659ac30d862ee7bab92862cd6e514f07521 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4abb4e284d8897176e91d7a3168ee29ed876bb41 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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