Vulnerabilidad en Linux (CVE-2025-71236)

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad:<br /> <br /> scsi: qla2xxx: Validar sp antes de liberar la memoria asociada<br /> <br /> Fallo del sistema con la siguiente firma<br /> [154563.214890] nvme nvme2: NVME-FC{1}: conexión del controlador completada<br /> [154564.169363] qla2xxx [0000:b0:00.1]-3002:2: nvme: Sched: Establecer el umbral de intercambio ZIO en 3.<br /> [154564.169405] qla2xxx [0000:b0:00.1]-ffffff:2: ESTABLECER el umbral de intercambio de actividad ZIO en 5.<br /> [154565.539974] qla2xxx [0000:b0:00.1]-5013:2: base de datos RSCN cambiada – 0078 0080 0000.<br /> [154565.545744] qla2xxx [0000:b0:00.1]-5013:2: base de datos RSCN cambiada – 0078 00a0 0000.<br /> [154565.545857] qla2xxx [0000:b0:00.1]-11a2:2: FEC=habilitado (tasa de datos).<br /> [154565.552760] qla2xxx [0000:b0:00.1]-11a2:2: FEC=habilitado (tasa de datos).<br /> [154565.553079] ERROR: desreferencia de puntero NULL del kernel, dirección: 00000000000000f8<br /> [154565.553080] #PF: acceso de lectura de supervisor en modo kernel<br /> [154565.553082] #PF: error_code(0x0000) - página no presente<br /> [154565.553084] PGD 80000010488ab067 P4D 80000010488ab067 PUD 104978a067 PMD 0<br /> [154565.553089] Oops: 0000 1 PREEMPT SMP PTI<br /> [154565.553092] CPU: 10 PID: 858 Comm: qla2xxx_2_dpc Kdump: cargado Tainted: G OE ------- --- 5.14.0-503.11.1.el9_5.x86_64 #1<br /> [154565.553096] Nombre del hardware: HPE Synergy 660 Gen10/Synergy 660 Gen10 Compute Module, BIOS I43 30/09/2024<br /> [154565.553097] RIP: 0010:qla_fab_async_scan.part.0+0x40b/0x870 [qla2xxx]<br /> [154565.553141] Código: 00 00 e8 58 a3 ec d4 49 89 e9 ba 12 20 00 00 4c 89 e6 49 c7 c0 00 ee a8 c0 48 c7 c1 66 c0 a9 c0 bf 00 80 00 10 e8 15 69 00 00 &amp;lt;4c&amp;gt; 8b 8d f8 00 00 00 4d 85 c9 74 35 49 8b 84 24 00 19 00 00 48 8b<br /> [154565.553143] RSP: 0018:ffffb4dbc8aebdd0 EFLAGS: 00010286<br /> [154565.553145] RAX: 0000000000000000 RBX: ffff8ec2cf0908d0 RCX: 0000000000000002<br /> [154565.553147] RDX: 0000000000000000 RSI: ffffffffc0a9c896 RDI: ffffb4dbc8aebd47<br /> [154565.553148] RBP: 0000000000000000 R08: ffffb4dbc8aebd45 R09: 0000000000ffff0a<br /> [154565.553150] R10: 0000000000000000 R11: 000000000000000f R12: ffff8ec2cf0908d0<br /> [154565.553151] R13: ffff8ec2cf090900 R14: 0000000000000102 R15: ffff8ec2cf084000<br /> [154565.553152] FS: 0000000000000000(0000) GS:ffff8ed27f800000(0000) knlGS:0000000000000000<br /> [154565.553154] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033<br /> [154565.553155] CR2: 00000000000000f8 CR3: 000000113ae0a005 CR4: 00000000007706f0<br /> [154565.553157] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000<br /> [154565.553158] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400<br /> [154565.553159] PKRU: 55555554<br /> [154565.553160] Traza de llamadas:<br /> [154565.553162] <br /> [154565.553165] ? show_trace_log_lvl+0x1c4/0x2df<br /> [154565.553172] ? show_trace_log_lvl+0x1c4/0x2df<br /> [154565.553177] ? qla_fab_async_scan.part.0+0x40b/0x870 [qla2xxx]<br /> [154565.553215] ? __die_body.cold+0x8/0xd<br /> [154565.553218] ? page_fault_oops+0x134/0x170<br /> [154565.553223] ? snprintf+0x49/0x70<br /> [154565.553229] ? exc_page_fault+0x62/0x150<br /> [154565.553238] ? asm_exc_page_fault+0x22/0x30<br /> <br /> Verificar que sp no sea NULL antes de liberar cualquier memoria asociada