Alertas de Seguridad de la Información

M Alto vulnerabilidad

16/09/2026

[CVE-2026-89793] In the Linux kernel, the following vulnerability has been resolved: ublk: clear VM_MAYWRITE on read…

In the Linux kernel, the following vulnerability has been resolved: ublk: clear VM_MAYWRITE on read-only ublk char device mmap ublk_ch_mmap() rejects mmap requests with VM_WRITE set, but never clears VM_MAYWRITE on the resulting read-only mapping. This allows a userspace daemon to mmap the per-queue command buffer PROT_READ, then upgrade it to PROT_WRITE via mprotect(), since VM_MAYWRITE was nev…

nvdaltovulnerabilidad CVSS 7.8 NVD

M Crítico vulnerabilidad

16/09/2026

Vulnerabilidad crítica en Arista EOS con P4Runtime permite ejecución remota de código

Una vulnerabilidad de puntuación CVSS 10 en Arista EOS permite que clientes no autenticados ejecuten código arbitrario con privilegios administrativos en switches configurados con P4Runtime. Aunque P4Runtime está deshabilitado por defecto, equipos que lo han activado para programabilidad de red enfrentan riesgo crítico. Esta falla afecta especialmente a proveedores de servicios y operadores de centros de datos en Latinoamérica que utilizan infraestructura Arista.

nvdcriticovulnerabilidad CVSS 10.0 NVD

M Alto vulnerabilidad

16/09/2026

Vulnerabilidad alta en Arista EOS OSPFv3: reinicio no autorizado de agente

Una vulnerabilidad en Arista EOS con OSPFv3 configurado (CVSS 7.5) permite que paquetes especialmente crafteados causen el reinicio inesperado del agente OSPFv3, interrumpiendo la disponibilidad de enrutadores en infraestructuras altas. El impacto afecta principalmente a operadores de redes en centros de datos y proveedores de conectividad en LATAM que dependen de equipos Arista para su backbone de red.

nvdaltovulnerabilidad CVSS 7.5 NVD

M Alto vulnerabilidad

16/09/2026

[CVE-2026-89792] In the Linux kernel, the following vulnerability has been resolved: ksmbd: prevent out-of-bounds re…

In the Linux kernel, the following vulnerability has been resolved: ksmbd: prevent out-of-bounds reads in share config responses Validate IPC share configuration payload sizes before consuming variable-length fields. Bound veto list parsing and account for the separator byte when deriving the path length.

nvdaltovulnerabilidad CVSS 7.1 NVD

M Crítico vulnerabilidad

16/09/2026

[CVE-2026-89786] In the Linux kernel, the following vulnerability has been resolved: ext4: fix out-of-bounds read in…

In the Linux kernel, the following vulnerability has been resolved: ext4: fix out-of-bounds read in ext4_read_inline_dir() ext4_read_inline_dir() can read a dirent header past the end of its inline buffer, triggering a slab-out-of-bounds read during getdents64(): BUG: KASAN: slab-out-of-bounds in __ext4_check_dir_entry Read of size 2 at addr ffff88800f3dd23c by task exploit/148 ... __…

nvdcriticovulnerabilidad CVSS 9.1 NVD

M Crítico vulnerabilidad

16/09/2026

[CVE-2026-89788] In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix tree connection use-…

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix tree connection use-after-free in smb2_tree_connect() ksmbd_tree_conn_connect() publishes a new tree connection in sess->tree_conns with a single reference and returns its pointer to smb2_tree_connect(). The handler continues to initialize the object and build the response after publication. A concurrent session logof…

nvdcriticovulnerabilidad CVSS 9.8 NVD

M Alto vulnerabilidad

16/09/2026

[CVE-2026-89789] In the Linux kernel, the following vulnerability has been resolved: gtp: add synchronize_net() in g…

In the Linux kernel, the following vulnerability has been resolved: gtp: add synchronize_net() in gtp_newlink() error path to prevent use-after-free gtp_newlink()'s error path frees tid_hash and addr_hash without waiting for an RCU grace period after clearing sk_user_data. A concurrent gtp_encap_recv() in softirq may still hold the gtp_dev pointer obtained via rcu_dereference_sk_user_data() and …

nvdaltovulnerabilidad CVSS 7.8 NVD

M Alto vulnerabilidad

16/09/2026

[CVE-2026-89791] In the Linux kernel, the following vulnerability has been resolved: perf: Fix use-after-free when p…

In the Linux kernel, the following vulnerability has been resolved: perf: Fix use-after-free when perf mmap() revival races with the last munmap() perf_mmap_close() drops rb->mmap_count *without* holding event->mmap_mutex (the refcount_dec_and_test() right before the refcount_dec_and_mutex_lock() of event->mmap_count). A concurrent perf_mmap_rb() can slot its entire "revival" path into that wind…

nvdaltovulnerabilidad CVSS 7.8 NVD

M Alto vulnerabilidad

16/09/2026

[CVE-2026-89777] In the Linux kernel, the following vulnerability has been resolved: vfio/pci: clear vdev->msi_perm …

In the Linux kernel, the following vulnerability has been resolved: vfio/pci: clear vdev->msi_perm after freeing it on init failure vfio_msi_cap_len() lazily allocates the per-device MSI permission table: vdev->msi_perm = kmalloc_obj(struct perm_bits, GFP_KERNEL_ACCOUNT); if (!vdev->msi_perm) return -ENOMEM; ret = init_pci_cap_msi_perm(vdev->msi_perm, len, flags); if (ret) { kfree(vdev…

nvdaltovulnerabilidad CVSS 8.8 NVD

M Crítico vulnerabilidad

16/09/2026

[CVE-2026-89778] In the Linux kernel, the following vulnerability has been resolved: isofs: fix out-of-bounds page a…

In the Linux kernel, the following vulnerability has been resolved: isofs: fix out-of-bounds page array access on empty zisofs block zisofs_uncompress_block()'s empty-block fast path returns pcount

nvdcriticovulnerabilidad CVSS 9.8 NVD

M Crítico vulnerabilidad

16/09/2026

[CVE-2026-89779] In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: validate ef->size cov…

In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: validate ef->size covers the record's name and value When an EA record has a non-zero ef->size, ntfs_read_ea() only checks that the record fits in the remaining buffer (ea_size > bytes), not that ef->size is large enough to hold the record's own name_len + 1 + elength. A crafted image can pass validation with, e.g., e…

nvdcriticovulnerabilidad CVSS 9.1 NVD

M Alto vulnerabilidad

16/09/2026

[CVE-2026-89781] In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: fix out-of-bounds rea…

In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: fix out-of-bounds read in read_log_rec_buf() read_log_rec_buf() copies a log record into a caller buffer starting at u32 off = lsn_to_page_off(log, lsn) + log->record_header_len; log->record_header_len (and log->data_off, used for the following pages) comes verbatim from the on-disk restart area and is only checked …

nvdaltovulnerabilidad CVSS 8.4 NVD

M Alto vulnerabilidad

16/09/2026

[CVE-2026-89782] In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: reject restart table …

In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: reject restart table growth beyond U16_MAX entries During $LogFile replay, log_replay() indexes the transaction table by the transact_id taken from the log record header. check_log_rec() only verifies that transact_id is non-zero and properly aligned, not its magnitude, so a crafted image can request an arbitrarily la…

nvdaltovulnerabilidad CVSS 8.4 NVD

M Crítico vulnerabilidad

16/09/2026

[CVE-2026-89783] In the Linux kernel, the following vulnerability has been resolved: xfrm6: fix out-of-bounds write …

In the Linux kernel, the following vulnerability has been resolved: xfrm6: fix out-of-bounds write in xfrm6_input_addr() when secpath is full The depth check in xfrm6_input_addr() is off by one: if (1 + sp->len == XFRM_MAX_DEPTH) goto drop; ... sp->xvec[sp->len++] = x; xfrm_input() can leave sp->len == XFRM_MAX_DEPTH, and the transport-mode receive path re-enters IPv6 input via…

nvdcriticovulnerabilidad CVSS 9.8 NVD

M Alto vulnerabilidad

16/09/2026

[CVE-2026-89774] In the Linux kernel, the following vulnerability has been resolved: Bluetooth: SCO: hold sk properl…

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: SCO: hold sk properly in sco_conn_ready sk deref in sco_conn_ready must be done either under conn->lock, or holding a refcount, to avoid concurrent close. conn->sk and parent sk is currently accessed without either, and without checking parent->sk_state: [Task 1] [Task 2] sco_so…

nvdaltovulnerabilidad CVSS 8.8 NVD

M Crítico vulnerabilidad

16/09/2026

[CVE-2026-89775] In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Handle negative S1 …

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Handle negative S1 walk levels in VNCR TLB size evaluation Computing the effects of a TLB invalidation involves looking at the size of the mapping cached by the TLB. For S1 mappings such as VNCR, this is deducted from the combination of the base granule size and the mapping level. However, this implies that the S1 M…

nvdcriticovulnerabilidad CVSS 9.3 NVD

M Alto vulnerabilidad

16/09/2026

Vulnerabilidad alta en NLnet Labs Unbound: desbordamiento de búfer por consultas DNS malformadas

NLnet Labs Unbound versiones hasta 1.26.0 es vulnerable a desbordamiento de búfer en memoria durante el procesamiento de respuestas TCP con nombres de consulta de 255 caracteres. Un atacante controlando un servidor DNS malicioso puede explotar esta falla para ejecutar código arbitrario o causar negación de servicio en recursores DNS de empresas. El impacto es alta en infraestructuras de LATAM que dependen de Unbound para resolución DNS.

nvdaltovulnerabilidad CVSS 7.5 NVD

M Alto vulnerabilidad

16/09/2026

Vulnerabilidad alta en Arista EOS con gNSI permite escalada de privilegios (CVE-2026-73454)

Plataformas Arista EOS con interfaz gRPC Network Security Interface (gNSI) Credentialz configurada son vulnerables a solicitudes especialmente diseñadas que modifican propiedades de cuentas de usuario. Un atacante podría asignar privilegios elevados a cuentas existentes, comprometiendo el control de acceso en infraestructura de red alta. El impacto afecta directamente a proveedores de servicios y centros de datos en LATAM que dependen de equipos Arista para segmentación y control de tráfico.

nvdaltovulnerabilidad CVSS 8.1 NVD

M Alto vulnerabilidad

16/09/2026

Vulnerabilidad alta en Arista EOS permite ejecución remota de código con privilegios root

Arista EOS presenta una vulnerabilidad (CVSS 8.8) en la interfaz gRPC Network Management Interface (gNMI) que permite a clientes autenticados ejecutar código arbitrario con privilegios root en switches de red. Afecta infraestructuras altas de centros de datos y proveedores de servicios en LATAM que utilizan equipos Arista con gNMI habilitado. El riesgo es elevado en entornos de nube privada y redes corporativas donde estos switches gestionan tráfico sensible.

nvdaltovulnerabilidad CVSS 8.8 NVD

M Alto vulnerabilidad

16/09/2026

[CVE-2026-2380] Vulnerabilidad de registro no autorizado en Arista EOS con servicios OpenConfig

Plataformas Arista EOS ejecutando servicios OpenConfig (gNMI, gNSI, RESTCONF, NETCONF) registran inadecuadamente solicitudes y respuestas sensibles en el dispositivo local o servidores de contabilidad remota, exponiendo credenciales y configuraciones altas. La vulnerabilidad afecta infraestructuras de redes datacenter y carriers en LATAM que utilizan automatización basada en OpenConfig para gestión de equipos Arista.

nvdaltovulnerabilidad CVSS 7.4 NVD