Answer in brief
CVE-2025-21744 records a Unknown severity vulnerability in wifi: brcmfmac: fix NULL pointer dereference in brcmf_txfinalize(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=7f00ee2bbc630900ba16fc2690473f3e2db0e264 <2326e19190e176fd72bb542b837a9d2b7fcb8693 || >=7f00ee2bbc630900ba16fc2690473f3e2db0e264 <59ff4fa653ff6db07c61152516ffba79c2a74bda || >=7f00ee2bbc630900ba16fc2690473f3e2db0e264 <61541d9b5a23df33934fcc620a3a81f246b1b240 || >=7f00ee2bbc630900ba16fc2690473f3e2db0e264 <4e51d6d093e763348916e69d06d87e0a5593661b || >=7f00ee2bbc630900ba16fc2690473f3e2db0e264 <3877fc67bd3d5566cc12763bce39710ceb74a97d || >=7f00ee2bbc630900ba16fc2690473f3e2db0e264 <fbbfef2a5b858eab55741a58b2ac9a0cc8d53c58 || >=7f00ee2bbc630900ba16fc2690473f3e2db0e264 <a2beefc4fa49ebc22e664dc6b39dbd054f8488f9 || >=7f00ee2bbc630900ba16fc2690473f3e2db0e264 <68abd0c4ebf24cd499841a488b97a6873d5efabb || 6faa698c35a43b9e74ea24e90fe37471d08d00d0 || 9119232cc92a269d7860b4aa51f07d3923a3cc10 || >=4.7.10 <4.8 || >=4.8.4 <4.9 | 2326e19190e176fd72bb542b837a9d2b7fcb8693, 59ff4fa653ff6db07c61152516ffba79c2a74bda, 61541d9b5a23df33934fcc620a3a81f246b1b240, 4e51d6d093e763348916e69d06d87e0a5593661b, 3877fc67bd3d5566cc12763bce39710ceb74a97d, fbbfef2a5b858eab55741a58b2ac9a0cc8d53c58, a2beefc4fa49ebc22e664dc6b39dbd054f8488f9, 68abd0c4ebf24cd499841a488b97a6873d5efabb, 4.8, 4.9 |
| Linux/Linuxgeneric | 4.9 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Feb 27, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 15, 2026
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.
Quoted source text, attributed separately from HOL analysis.