CVE-2025-21744— wifi: brcmfmac: fix NULL pointer dereference in brcmf_txfinalize()
Affected Version Matrix 22
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 7f00ee2bbc630900ba16fc2690473f3e2db0e264< 2326e19190e176fd72bb542b837a9d2b7fcb8693 | affected |
7f00ee2bbc630900ba16fc2690473f3e2db0e264< 59ff4fa653ff6db07c61152516ffba79c2a74bda | affected | ||
7f00ee2bbc630900ba16fc2690473f3e2db0e264< 61541d9b5a23df33934fcc620a3a81f246b1b240 | affected | ||
7f00ee2bbc630900ba16fc2690473f3e2db0e264< 4e51d6d093e763348916e69d06d87e0a5593661b | affected | ||
7f00ee2bbc630900ba16fc2690473f3e2db0e264< 3877fc67bd3d5566cc12763bce39710ceb74a97d | affected | ||
7f00ee2bbc630900ba16fc2690473f3e2db0e264< fbbfef2a5b858eab55741a58b2ac9a0cc8d53c58 | affected | ||
7f00ee2bbc630900ba16fc2690473f3e2db0e264< a2beefc4fa49ebc22e664dc6b39dbd054f8488f9 | affected | ||
7f00ee2bbc630900ba16fc2690473f3e2db0e264< 68abd0c4ebf24cd499841a488b97a6873d5efabb | affected | ||
| … +14 more rows | |||
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I. Basic Information for CVE-2025-21744
Vulnerability Information
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Vulnerability Title
wifi: brcmfmac: fix NULL pointer dereference in brcmf_txfinalize()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: fix NULL pointer dereference in brcmf_txfinalize() On removal of the device or unloading of the kernel module a potential NULL pointer dereference occurs. The following sequence deletes the interface: brcmf_detach() brcmf_remove_interface() brcmf_del_if() Inside the brcmf_del_if() function the drvr->if2bss[ifidx] is updated to BRCMF_BSSIDX_INVALID (-1) if the bsscfgidx matches. After brcmf_remove_interface() call the brcmf_proto_detach() function is called providing the following sequence: brcmf_detach() brcmf_proto_detach() brcmf_proto_msgbuf_detach() brcmf_flowring_detach() brcmf_msgbuf_delete_flowring() brcmf_msgbuf_remove_flowring() brcmf_flowring_delete() brcmf_get_ifp() brcmf_txfinalize() Since brcmf_get_ip() can and actually will return NULL in this case the call to brcmf_txfinalize() will result in a NULL pointer dereference inside brcmf_txfinalize() when trying to update ifp->ndev->stats.tx_errors. This will only happen if a flowring still has an skb. Although the NULL pointer dereference has only been seen when trying to update the tx statistic, all other uses of the ifp pointer have been guarded as well with an early return if ifp is NULL.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于brcmf_txfinalize函数中可能存在空指针取消引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-21744
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|---|
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Patches & Fixes for CVE-2025-21744 (5)
Other References for CVE-2025-21744 (2)
Same Patch Batch · Linux · 2025-02-27 · 177 CVEs total
| CVE-2025-21756 | 7.8 HIGH | vsock: Keep the binding until socket destruction |
| CVE-2025-21773 | can: etas_es58x: fix potential NULL pointer dereference on udev->serial | |
| CVE-2025-21763 | neighbour: use RCU protection in __neigh_notify() | |
| CVE-2025-21762 | arp: use RCU protection in arp_xmit() | |
| CVE-2025-21764 | ndisc: use RCU protection in ndisc_alloc_skb() | |
| CVE-2025-21765 | ipv6: use RCU protection in ip6_default_advmss() | |
| CVE-2025-21766 | ipv4: use RCU protection in __ip_rt_update_pmtu() | |
| CVE-2025-21767 | clocksource: Use migrate_disable() to avoid calling get_random_u32() in atomic context | |
| CVE-2025-21769 | ptp: vmclock: Add .owner to vmclock_miscdev_fops | |
| CVE-2025-21768 | net: ipv6: fix dst ref loops in rpl, seg6 and ioam6 lwtunnels | |
| CVE-2025-21771 | sched_ext: Fix incorrect autogroup migration detection | |
| CVE-2025-21770 | iommu: Fix potential memory leak in iopf_queue_remove_device() | |
| CVE-2025-21777 | ring-buffer: Validate the persistent meta data subbuf array | |
| CVE-2025-21783 | gpiolib: Fix crash on error in gpiochip_get_ngpios() | |
| CVE-2025-21781 | batman-adv: fix panic during interface removal | |
| CVE-2025-21780 | drm/amdgpu: avoid buffer overflow attach in smu_sys_set_pp_table() | |
| CVE-2025-21779 | KVM: x86: Reject Hyper-V's SEND_IPI hypercalls if local APIC isn't in-kernel | |
| CVE-2025-21778 | tracing: Do not allow mmap() of persistent ring buffer | |
| CVE-2025-21774 | can: rockchip: rkcanfd_handle_rx_fifo_overflow_int(): bail out if skb cannot be allocated | |
| CVE-2025-21772 | partitions: mac: fix handling of bogus partition table |
Showing top 20 of 177 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
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