Alertas de Seguridad de la Información

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63955] In the Linux kernel, the following vulnerability has been resolved: mm/vmalloc: do not trigger BUG(…

In the Linux kernel, the following vulnerability has been resolved: mm/vmalloc: do not trigger BUG() on BH disabled context __get_vm_area_node() currently triggers a BUG() if in_interrupt() returns true. However, in_interrupt() also reports true when BH are disabled. The bridge code can call rhashtable_lookup_insert_fast() with bottom halves disabled: __vlan_add() -> br_fdb_add_local() spi…

nvdaltovulnerabilidad CVSS 7.5 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63945] In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: serialize iso_s…

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: serialize iso_sock_clear_timer with socket lock iso_sock_close() calls iso_sock_clear_timer() before acquiring lock_sock(sk). iso_sock_clear_timer() reads iso_pi(sk)->conn twice without the socket lock held: if (!iso_pi(sk)->conn) return; cancel_delayed_work(&iso_pi(sk)->conn->timeout_work); Co…

nvdaltovulnerabilidad CVSS 7.8 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63946] In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: fix UAF in iso_…

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: fix UAF in iso_recv_frame iso_recv_frame reads conn->sk under iso_conn_lock but releases the lock before using sk, with no reference held. A concurrent iso_sock_kill() can free sk in that window, causing use-after-free on sk->sk_state and sock_queue_rcv_skb(). Fix by replacing the bare pointer read with iso_sock…

nvdaltovulnerabilidad CVSS 8.8 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63947] In the Linux kernel, the following vulnerability has been resolved: Bluetooth: HIDP: fix missing le…

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: HIDP: fix missing length checks in hidp_input_report() hidp_input_report() reads keyboard and mouse payload data from an skb without first verifying that skb->len contains enough data. hidp_recv_intr_frame() pulls the 1-byte HIDP header before dispatching to hidp_input_report(). If a paired device sends a truncated p…

nvdaltovulnerabilidad CVSS 8.8 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63950] In the Linux kernel, the following vulnerability has been resolved: mm/rmap: initialize nr_pages to…

In the Linux kernel, the following vulnerability has been resolved: mm/rmap: initialize nr_pages to 1 at loop start in try_to_unmap_one Initialize nr_pages to 1 at the start of each loop iteration, like folio_referenced_one() does. Without this, nr_pages computed by a previous folio_unmap_pte_batch() call can be reused on a later iteration that does not run folio_unmap_pte_batch() again. mmap …

nvdaltovulnerabilidad CVSS 7.8 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63951] In the Linux kernel, the following vulnerability has been resolved: zram: fix use-after-free in zra…

In the Linux kernel, the following vulnerability has been resolved: zram: fix use-after-free in zram_writeback_endio A crash was observed in zram_writeback_endio due to a NULL pointer dereference in wake_up. The root cause is a race condition between the bio completion handler (zram_writeback_endio) and the writeback task. In zram_writeback_endio, wake_up() is called on &wb_ctl->done_wait afte…

nvdaltovulnerabilidad CVSS 7.8 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63952] In the Linux kernel, the following vulnerability has been resolved: memfd: deny writeable mappings …

In the Linux kernel, the following vulnerability has been resolved: memfd: deny writeable mappings when implying SEAL_WRITE When SEAL_EXEC is added, SEAL_WRITE is implied to make W^X. But the implied seal is set after the check that makes sure the memfd can not have any writable mappings. This means one can use SEAL_EXEC to apply SEAL_WRITE while having writeable mappings. This breaks the con…

nvdaltovulnerabilidad CVSS 8.4 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63937] In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Use READ_ONCE() when …

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Use READ_ONCE() when reading entries/indices from PSC buffer Use READ_ONCE() when reading entries/indices from the guest-accessible Page State Change buffer to defend against TOCTOU bugs. Don't bother with READ_ONCE()/WRITE_ONCE() for cases where KVM is writing (and not consuming the result!), as the guest isn't suppo…

nvdaltovulnerabilidad CVSS 8.8 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63941] In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Correctly cap ZCR_E…

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Correctly cap ZCR_EL2 provided by a guest hypervisor ZCR_EL2 can be updated by a VHE guest hypervisor either using ZCR_EL2 (which traps) or ZCR_EL1 (which does not trap). KVM handles both in different way: - on ZCR_EL2 trap, ZCR_EL2.LEN is immediately capped at the VM's own VL limit. This has the potential to brea…

nvdaltovulnerabilidad CVSS 8.8 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63942] In the Linux kernel, the following vulnerability has been resolved: parport: Fix race between port …

In the Linux kernel, the following vulnerability has been resolved: parport: Fix race between port and client registration The parport subsystem registers port devices before they are fully initialised, resulting in a race condition where client drivers such as lp can attach to ports that are not completely initialised or even being torn down. When the port and client drivers are built as modul…

nvdaltovulnerabilidad CVSS 7.8 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63944] In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: fix UAF in…

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: fix UAF in hci_le_create_cis_sync hci_le_create_cis_sync() dereferences conn->conn_timeout after releasing both rcu_read_lock() and hci_dev_lock(hdev). The conn pointer was obtained from an RCU-protected iteration over hdev->conn_hash.list and is not valid once these locks are dropped. A concurrent disconn…

nvdaltovulnerabilidad CVSS 8.8 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63927] In the Linux kernel, the following vulnerability has been resolved: usb: dwc2: Fix use after free i…

In the Linux kernel, the following vulnerability has been resolved: usb: dwc2: Fix use after free in debug code We're not allowed to dereference "urb" after calling usb_hcd_giveback_urb() so save the urb->status ahead of time.

nvdaltovulnerabilidad CVSS 7.8 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63930] In the Linux kernel, the following vulnerability has been resolved: iio: buffer: hw-consumer: fix u…

In the Linux kernel, the following vulnerability has been resolved: iio: buffer: hw-consumer: fix use-after-free in error path In the err_put_buffers cleanup path of iio_hw_consumer_alloc(), the code was using list_for_each_entry() to iterate through buffers while calling iio_buffer_put() which can free the current buffer if refcount drops to 0. The list_for_each_entry() loop macro then evaluate…

nvdaltovulnerabilidad CVSS 7.8 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63919] In the Linux kernel, the following vulnerability has been resolved: xfrm: input: hold netns during …

In the Linux kernel, the following vulnerability has been resolved: xfrm: input: hold netns during deferred transport reinjection Transport-mode reinjection stores a struct net pointer in skb->cb and uses it later from xfrm_trans_reinject(). That pointer must stay valid until the deferred callback runs. Take a netns reference when queueing deferred reinjection work and drop it after the callbac…

nvdaltovulnerabilidad CVSS 8.8 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63920] In the Linux kernel, the following vulnerability has been resolved: ipv6: validate extension header…

In the Linux kernel, the following vulnerability has been resolved: ipv6: validate extension header length before copying to cmsg ip6_datagram_recv_specific_ctl() builds IPV6_{HOPOPTS,DSTOPTS,RTHDR} cmsgs (and their IPV6_2292* legacy counterparts) by trusting the on-wire hdrlen byte (ptr[1]) when computing the put_cmsg() length. The length was validated only at parse time (ipv6_parse_hopopts(), …

nvdaltovulnerabilidad CVSS 7.1 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63921] In the Linux kernel, the following vulnerability has been resolved: ip6: vti: Use ip6_tnl.net in vt…

In the Linux kernel, the following vulnerability has been resolved: ip6: vti: Use ip6_tnl.net in vti6_siocdevprivate(). After patch 1/2 in this series, vti6_update() unlinks and relinks the tunnel through t->net. vti6_siocdevprivate() still uses dev_net(dev) for the collision lookup. For a tunnel moved through IFLA_NET_NS_FD, dev_net(dev) is the new netns, not t->net. SIOCCHGTUNNEL on a migrate…

nvdaltovulnerabilidad CVSS 8.8 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63923] In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: validate body pci…

In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: validate body pcifunc in rvu_mbox_handler_rep_event_notify rvu_mbox_handler_rep_event_notify() in drivers/net/ethernet/marvell/ octeontx2/af/rvu_rep.c queues a sender-controlled REP_EVENT_NOTIFY request body verbatim, and rvu_rep_up_notify() then forwards event->pcifunc (the nested body field, distinct from the AF-…

nvdaltovulnerabilidad CVSS 8.8 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63925] In the Linux kernel, the following vulnerability has been resolved: macsec: fix replay protection a…

In the Linux kernel, the following vulnerability has been resolved: macsec: fix replay protection at XPN lower-PN wrap In macsec_post_decrypt(), when pn is U32_MAX, pn + 1 overflows u32 to 0 and the first branch never fires. If next_pn_halves.lower is also in the upper half, pn_same_half(pn, lower) is true and the XPN else-if does not fire either, leaving next_pn_halves unchanged. An attacker th…

nvdaltovulnerabilidad CVSS 8.1 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63926] In the Linux kernel, the following vulnerability has been resolved: bpf: sockmap: fix tail fragment…

In the Linux kernel, the following vulnerability has been resolved: bpf: sockmap: fix tail fragment offset in bpf_msg_push_data When bpf_msg_push_data() inserts data in the middle of a scatterlist entry, it splits the original entry into a left fragment and a right fragment. The right fragment offset is page-local, but the code advances it with `start`, which is the message-global insertion poi…

nvdaltovulnerabilidad CVSS 8.4 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63913] In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: tcp: do n…

In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: tcp: do not force CLOSE on invalid-seq RST without direction check An unintended behavior in the TCP conntrack state machine allows a connection to be forced into the CLOSE state using an RST packet with an invalid sequence number. Specifically, after a SYN packet is observed, an RST with an invalid SEQ ca…

nvdaltovulnerabilidad CVSS 8.2 NVD