{"id":"CVE-2026-93094","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath12k: fix dp_link_peer dangling references on AP vdev rollback\n\nath12k_mac_vdev_create() for an AP vdev creates the bss self-peer via\nath12k_peer_create(), whic…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath12k: fix dp_link_peer dangling references on AP vdev rollback\n\nath12k_mac_vdev_create() for an AP vdev creates the bss self-peer via\nath12k_peer_create(), whic…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= 5525f12fa671a007c6c6044c861eee86de71b576 < af405d216316d99f9b48733145fc708110011e0f","Linux >= 5525f12fa671a007c6c6044c861eee86de71b576 < f066e1a93703c5be0fd905109d00587541711c97","Linux 7.0"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:18:03.430","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93094","references":[{"url":"https://git.kernel.org/stable/c/af405d216316d99f9b48733145fc708110011e0f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f066e1a93703c5be0fd905109d00587541711c97","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93094.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-93094"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536486"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93094"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93094"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93094.mbox"},{"url":"https://kernelcve.org/list/?q=CVE-2026-93094"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-09-17T16:21:47.758Z","epss":0.00198,"epssPercentile":0.0943,"cvss":4.7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-416"],"slug":"CVE-2026-93094","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath12k: fix dp_link_peer dangling references on AP vdev rollback\n\nath12k_mac_vdev_create() for an AP vdev creates the bss self-peer via\nath12k_peer_create(), which finishes by calling\nath12k_dp_link_peer_assign() to publish the dp_link_peer in the\ndp_hw->dp_peers[peerid_index] RCU table, in the dp_peer's\nlink_peers[] array, and in the per-addr rhashtable.\n\nIf a step after ath12k_peer_create() fails the function jumps to\nerr_peer_del, which open-codes a WMI peer_delete and waits for the\nunmap / delete_resp events. The wait_for_peer_delete_done() path\nrelies on ath12k_dp_link_peer_unmap_event() freeing the dp_link_peer\nwhen the unmap arrives, but err_peer_del never calls\nath12k_dp_link_peer_unassign() first. The published references in\nthe dp_hw RCU table, dp_peer->link_peers[] and the rhashtable are\nleft pointing at the dp_link_peer that unmap_event then frees,\nproducing dangling pointers and use-after-free on subsequent\nlookups.\n\nReplace the open-coded sequence with a call to ath12k_peer_delete(),\nwhich already does ath12k_dp_link_peer_unassign() before sending the\nWMI command. This drops the published references before the\ndp_link_peer is freed, in the same order as the normal teardown path\nin ath12k_mac_remove_link_interface().\n\nTested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c7-00108-QCAHMTSWPL_V1.0_V2.0_SILICONZ_UPSTREAM-3\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93094.json)","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":25.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228720,"id":"CVE-2026-93094","ts":1792844935948,"field":"cvss","old":null,"new":"4.7"},{"seq":228719,"id":"CVE-2026-93094","ts":1792844935948,"field":"severity","old":"none","new":"medium"}]}