5.5 CVE-2025-38606

Enriched by CISA Patch
 

In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: Avoid accessing uninitialized arvif->ar during beacon miss During beacon miss handling, ath12k driver iterates over active virtual interfaces (vifs) and attempts to access the radio object (ar) via arvif->deflink->ar. However, after commit aa80f12f3bed ("wifi: ath12k: defer vdev creation for MLO"), arvif is linked to a radio only after vdev creation, typically when a channel is assigned or a scan is requested. For P2P capable devices, a default P2P interface is created by wpa_supplicant along with regular station interfaces, these serve as dummy interfaces for P2P-capable stations, lack an associated netdev and initiate frequent scans to discover neighbor p2p devices. When a scan is initiated on such P2P vifs, driver selects destination radio (ar) based on scan frequency, creates a scan vdev, and attaches arvif to the radio. Once the scan completes or is aborted, the scan vdev is deleted, detaching arvif from the radio and leaving arvif->ar uninitialized. While handling beacon miss for station interfaces, P2P interface is also encountered in the vif iteration and ath12k_mac_handle_beacon_miss_iter() tries to dereference the uninitialized arvif->deflink->ar. Fix this by verifying that vdev is created for the arvif before accessing its ar during beacon miss handling and similar vif iterator callbacks. ========================================================================== wlp6s0: detected beacon loss from AP (missed 7 beacons) - probing KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] CPU: 5 UID: 0 PID: 0 Comm: swapper/5 Not tainted 6.16.0-rc1-wt-ath+ #2 PREEMPT(full) RIP: 0010:ath12k_mac_handle_beacon_miss_iter+0xb5/0x1a0 [ath12k] Call Trace: __iterate_interfaces+0x11a/0x410 [mac80211] ieee80211_iterate_active_interfaces_atomic+0x61/0x140 [mac80211] ath12k_mac_handle_beacon_miss+0xa1/0xf0 [ath12k] ath12k_roam_event+0x393/0x560 [ath12k] ath12k_wmi_op_rx+0x1486/0x28c0 [ath12k] ath12k_htc_process_trailer.isra.0+0x2fb/0x620 [ath12k] ath12k_htc_rx_completion_handler+0x448/0x830 [ath12k] ath12k_ce_recv_process_cb+0x549/0x9e0 [ath12k] ath12k_ce_per_engine_service+0xbe/0xf0 [ath12k] ath12k_pci_ce_workqueue+0x69/0x120 [ath12k] process_one_work+0xe3a/0x1430 Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1 Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00284.1-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3
https://nvd.nist.gov/vuln/detail/CVE-2025-38606

Categories

CWE-476 : NULL Pointer Dereference
The product dereferences a pointer that it expects to be valid but is NULL. NULL pointer dereferences are frequently resultant from rarely encountered error conditions and race conditions, since these are most likely to escape detection during the testing phases. Common abbreviation for Null Pointer Dereference Common abbreviation for Null Pointer Dereference Common abbreviation for Null Pointer Exception used for access of nil in Go programs This weakness can be detected using dynamic tools and techniques that interact with the software using large test suites with many diverse inputs, such as fuzz testing (fuzzing), robustness testing, and fault injection. The software's operation may slow down, but it should not become unstable, crash, or generate incorrect results. Identify error conditions that are not likely to occur during normal usage and trigger them. For example, run the program under low memory conditions, run with insufficient privileges or permissions, interrupt a transaction before it is completed, or disable connectivity to basic network services such as DNS. Monitor the software for any unexpected behavior. If you trigger an unhandled exception or similar error that was discovered and handled by the application's environment, it may still indicate unexpected conditions that were not handled by the application itself. Automated static analysis, commonly referred to as Static Application Security Testing (SAST), can find some instances of this weakness by analyzing source code (or binary/compiled code) without having to execute it. Typically, this is done by building a model of data flow and control flow, then searching for potentially-vulnerable patterns that connect "sources" (origins of input) with "sinks" (destinations where the data interacts with external components, a lower layer such as the OS, etc.) Use tools that are integrated duringcompilation to insert runtime error-checking mechanismsrelated to memory safety errors, such as AddressSanitizer(ASan) for C/C++ [REF-1518]. For any pointers that could have been modified or provided from a function that can return NULL, check the pointer for NULL before use. When working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the check, and unlock when it has finished [REF-1484]. Select a programming language that is not susceptible to these issues. Check the results of all functions that return a value and verify that the value is non-null before acting upon it. Identify all variables and data stores that receive information from external sources, and apply input validation to make sure that they are only initialized to expected values. Explicitly initialize all variables and other data stores, either during declaration or just before the first usage. C++ library for LLM inference has NULL pointer dereference if a read operation fails race condition causes a table to be corrupted if a timer activates while it is being modified, leading to resultant NULL dereference; also involves locking. large number of packets leads to NULL dereference packet with invalid error status value triggers NULL dereference Chain: race condition for an argument value, possibly resulting in NULL dereference ssh component for Go allows clients to cause a denial of service (nil pointer dereference) against SSH servers. Chain: Use of an unimplemented network socket operation pointing to an uninitialized handler function (CWE-456) causes a crash because of a null pointer dereference (CWE-476). Chain: race condition (CWE-362) might allow resource to be released before operating on it, leading to NULL dereference (CWE-476) Chain: some unprivileged ioctls do not verify that a structure has been initialized before invocation, leading to NULL dereference Chain: IP and UDP layers each track the same value with different mechanisms that can get out of sync, possibly resulting in a NULL dereference Chain: Use of an unimplemented network socket operation pointing to an uninitialized handler function (CWE-456) causes a crash because of a null pointer dereference (CWE-476) Chain: improper initialization of memory can lead to NULL dereference Chain: game server can access player data structures before initialization has happened leading to NULL dereference Chain: The return value of a function returning a pointer is not checked for success (CWE-252) resulting in the later use of an uninitialized variable (CWE-456) and a null pointer dereference (CWE-476) Chain: a message having an unknown message type may cause a reference to uninitialized memory resulting in a null pointer dereference (CWE-476) or dangling pointer (CWE-825), possibly crashing the system or causing heap corruption. Chain: unchecked return value can lead to NULL dereference SSL software allows remote attackers to cause a denial of service (crash) via a crafted SSL/TLS handshake that triggers a null dereference. Network monitor allows remote attackers to cause a denial of service (crash) via a malformed RADIUS packet that triggers a null dereference. Network monitor allows remote attackers to cause a denial of service (crash) via a malformed Q.931, which triggers a null dereference. Chat client allows remote attackers to cause a denial of service (crash) via a passive DCC request with an invalid ID number, which causes a null dereference. Server allows remote attackers to cause a denial of service (crash) via malformed requests that trigger a null dereference. OS allows remote attackers to cause a denial of service (crash from null dereference) or execute arbitrary code via a crafted request during authentication protocol selection. Game allows remote attackers to cause a denial of service (server crash) via a missing argument, which triggers a null pointer dereference. Network monitor allows remote attackers to cause a denial of service (crash) or execute arbitrary code via malformed packets that cause a NULL pointer dereference. Chain: System call returns wrong value (CWE-393), leading to a resultant NULL dereference (CWE-476).

References


 

AFFECTED (from MITRE)

Vendor Product Versions
Linux Linux
  • aa80f12f3bedc2d73e4cc43554aee44c277cc938 < 9b861dfc5c07defd0191fd3e7288a3179cd9a02e [affected]
  • aa80f12f3bedc2d73e4cc43554aee44c277cc938 < 1259b6da8303f70fef6ed4aef8ae3dedfecb0f27 [affected]
  • aa80f12f3bedc2d73e4cc43554aee44c277cc938 < 36670b67de18f1e5d34900c5d2ac60a8970c293c [affected]
Linux Linux
  • 6.14 [affected]
  • < 6.14 [unaffected]
  • 6.15.10 ≤ 6.15.* [unaffected]
  • 6.16.1 ≤ 6.16.* [unaffected]
  • 6.17 ≤ * [unaffected]
© 2022 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation.

CPE

cpe start end
Configuration 1
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* >= 6.14 < 6.15.10
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* >= 6.16 < 6.16.1

REMEDIATION

Patch

Url
https://git.kernel.org/stable/c/1259b6da8303f70fef6ed4aef8ae3dedfecb0f27
https://git.kernel.org/stable/c/36670b67de18f1e5d34900c5d2ac60a8970c293c
https://git.kernel.org/stable/c/9b861dfc5c07defd0191fd3e7288a3179cd9a02e

EXPLOITS

Exploit-db.com

id description date
No known exploits

POC Github

Url
No known exploits

Other Nist (github, ...)

Url
No known exploits

CAPEC

Common Attack Pattern Enumerations and Classifications

id description severity
No entry