CVE-2025-21744

{"id": "CVE-2025-21744", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2025-02-27T03:15:15.037", "references": [{"url": "https://git.kernel.org/stable/c/2326e19190e176fd72bb542b837a9d2b7fcb8693", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/3877fc67bd3d5566cc12763bce39710ceb74a97d", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/4e51d6d093e763348916e69d06d87e0a5593661b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/59ff4fa653ff6db07c61152516ffba79c2a74bda", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/61541d9b5a23df33934fcc620a3a81f246b1b240", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/68abd0c4ebf24cd499841a488b97a6873d5efabb", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a2beefc4fa49ebc22e664dc6b39dbd054f8488f9", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/fbbfef2a5b858eab55741a58b2ac9a0cc8d53c58", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html", "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: brcmfmac: fix NULL pointer dereference in brcmf_txfinalize()\n\nOn removal of the device or unloading of the kernel module a potential NULL\npointer dereference occurs.\n\nThe following sequence deletes the interface:\n\n brcmf_detach()\n brcmf_remove_interface()\n brcmf_del_if()\n\nInside the brcmf_del_if() function the drvr->if2bss[ifidx] is updated to\nBRCMF_BSSIDX_INVALID (-1) if the bsscfgidx matches.\n\nAfter brcmf_remove_interface() call the brcmf_proto_detach() function is\ncalled providing the following sequence:\n\n brcmf_detach()\n brcmf_proto_detach()\n brcmf_proto_msgbuf_detach()\n brcmf_flowring_detach()\n brcmf_msgbuf_delete_flowring()\n brcmf_msgbuf_remove_flowring()\n brcmf_flowring_delete()\n brcmf_get_ifp()\n brcmf_txfinalize()\n\nSince brcmf_get_ip() can and actually will return NULL in this case the\ncall to brcmf_txfinalize() will result in a NULL pointer dereference inside\nbrcmf_txfinalize() when trying to update ifp->ndev->stats.tx_errors.\n\nThis will only happen if a flowring still has an skb.\n\nAlthough the NULL pointer dereference has only been seen when trying to\nupdate the tx statistic, all other uses of the ifp pointer have been\nguarded as well with an early return if ifp is NULL."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: brcmfmac: se corrige la desreferencia de puntero NULL en brcmf_txfinalize() Al eliminar el dispositivo o descargar el m\u00f3dulo del kernel, se produce una posible desreferencia de puntero NULL. La siguiente secuencia elimina la interfaz: brcmf_detach() brcmf_remove_interface() brcmf_del_if() Dentro de la funci\u00f3n brcmf_del_if(), drvr->if2bss[ifidx] se actualiza a BRCMF_BSSIDX_INVALID (-1) si bsscfgidx coincide. Despu\u00e9s de llamar a brcmf_remove_interface(), se llama a la funci\u00f3n brcmf_proto_detach() proporcionando la siguiente secuencia: 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() Dado que brcmf_get_ip() puede devolver NULL y, de hecho, lo har\u00e1, en este caso la llamada a brcmf_txfinalize() dar\u00e1 como resultado una desreferencia de puntero NULL dentro de brcmf_txfinalize() al intentar actualizar ifp->ndev->stats.tx_errors. Esto solo suceder\u00e1 si un flowring todav\u00eda tiene un skb. Aunque la desreferencia del puntero NULL solo se ha visto al intentar actualizar la estad\u00edstica tx, todos los dem\u00e1s usos del puntero ifp tambi\u00e9n se han protegido con un retorno anticipado si ifp es NULL."}], "lastModified": "2025-11-03T20:17:13.890", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "18BF0B0B-D95C-472C-A99F-DE209F253F6F", "versionEndExcluding": "6.1.129"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0C58261F-EDFB-4A12-8CCD-F12101482030", "versionEndExcluding": "6.6.78", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "033BB7EE-C9A2-45EA-BAC9-87BB9D951BCD", "versionEndExcluding": "6.12.14", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0E92CEE3-1FC3-4AFC-A513-DEDBA7414F00", "versionEndExcluding": "6.13.3", "versionStartIncluding": "6.13"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}