Alertas de Seguridad de la Información

M Crítico vulnerabilidad

25/07/2026

[CVE-2026-64523] In the Linux kernel, the following vulnerability has been resolved: net/handshake: Take a long-live…

In the Linux kernel, the following vulnerability has been resolved: net/handshake: Take a long-lived file reference at submit handshake_nl_accept_doit() needs the file pointer backing req->hr_sk->sk_socket to survive the window between handshake_req_next() and the subsequent FD_PREPARE() and get_file(). The submit-side sock_hold() does not provide that. sk_refcnt keeps struct sock alive, but st…

nvdcriticovulnerabilidad CVSS 9.8 NVD

M Crítico vulnerabilidad

25/07/2026

[CVE-2026-64459] In the Linux kernel, the following vulnerability has been resolved: tcp: restore RCU grace period i…

In the Linux kernel, the following vulnerability has been resolved: tcp: restore RCU grace period in tcp_ao_destroy_sock Commit 51e547e8c89c ("tcp: Free TCP-AO/TCP-MD5 info/keys without RCU") removed the call_rcu() callback from tcp_ao_destroy_sock(), arguing that "the destruction of info/keys is delayed until the socket destructor" and therefore "no one can discover it anymore". That argument …

nvdcriticovulnerabilidad CVSS 9.8 NVD

M Crítico vulnerabilidad

25/07/2026

[CVE-2026-64450] In the Linux kernel, the following vulnerability has been resolved: tipc: fix out-of-bounds read in…

In the Linux kernel, the following vulnerability has been resolved: tipc: fix out-of-bounds read in broadcast Gap ACK blocks A broadcast PROTOCOL/STATE_MSG can carry a Gap ACK blocks record in its data area. tipc_get_gap_ack_blks() only verifies that the record's len field is self-consistent with its ugack_cnt/bgack_cnt counts (sz == struct_size(p, gacks, ugack_cnt + bgack_cnt)); it does not che…

nvdcriticovulnerabilidad CVSS 9.1 NVD

M Crítico vulnerabilidad

25/07/2026

[CVE-2026-64439] In the Linux kernel, the following vulnerability has been resolved: crypto: krb5 - filter out async…

In the Linux kernel, the following vulnerability has been resolved: crypto: krb5 - filter out async aead implementations at alloc krb5_aead_encrypt(), krb5_aead_decrypt() in rfc3961_simplified.c and rfc8009_encrypt(), rfc8009_decrypt() in rfc8009_aes2.c set a NULL completion callback and treat any negative return from crypto_aead_{encrypt,decrypt}() as terminal, falling through to kfree_sensitiv…

nvdcriticovulnerabilidad CVSS 9.8 NVD

M Crítico vulnerabilidad

25/07/2026

[CVE-2026-64410] In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: IPIP tunn…

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: IPIP tunnel hardware offload is not yet support No driver supports for IPIP tunnels yet, give up early on setting up the hardware offload for this scenario. This patch adds a stub that can be enhanced to add more configuration that are currently not supported. As of now, the offload work is enqueued to the…

nvdcriticovulnerabilidad CVSS 9.8 NVD

M Crítico vulnerabilidad

25/07/2026

[CVE-2026-64397] In the Linux kernel, the following vulnerability has been resolved: ksmbd: serialize QUERY_DIRECTOR…

In the Linux kernel, the following vulnerability has been resolved: ksmbd: serialize QUERY_DIRECTORY requests per file smb2_query_dir() stores a pointer to its stack-allocated private data in the ksmbd_file readdir_data. Concurrent QUERY_DIRECTORY requests using the same file handle can overwrite this pointer while an iterate_dir() callback is still using it, resulting in a stack use-after-free.…

nvdcriticovulnerabilidad CVSS 9.8 NVD

M Crítico vulnerabilidad

25/07/2026

[CVE-2026-64399] In the Linux kernel, the following vulnerability has been resolved: ksmbd: add permission checks fo…

In the Linux kernel, the following vulnerability has been resolved: ksmbd: add permission checks for FSCTL_DUPLICATE_EXTENTS_TO_FILE The FSCTL_DUPLICATE_EXTENTS_TO_FILE arm of smb2_ioctl() overwrites the destination file's data via vfs_clone_file_range() with neither the share-level KSMBD_TREE_CONN_FLAG_WRITABLE check nor a per-handle fp->daccess check that the other write-bearing arms carry. A …

nvdcriticovulnerabilidad CVSS 9.8 NVD

M Crítico vulnerabilidad

25/07/2026

[CVE-2026-64387] In the Linux kernel, the following vulnerability has been resolved: smb: client: fix query director…

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix query directory replay double-free A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_query_directory_init() fails before the next send, cleanup retains the previous buffer type and frees that response again. Reset response bookkeeping before each attempt to prevent t…

nvdcriticovulnerabilidad CVSS 9.8 NVD

M Crítico vulnerabilidad

25/07/2026

[CVE-2026-64391] In the Linux kernel, the following vulnerability has been resolved: ksmbd: use opener credentials f…

In the Linux kernel, the following vulnerability has been resolved: ksmbd: use opener credentials for ADS I/O Alternate data streams are stored as xattrs. Unlike regular file I/O, their read and write paths therefore call VFS xattr helpers which recheck inode permissions and LSM policy using the current task credentials. Run ADS I/O with the credentials captured when the SMB handle was opened.

nvdcriticovulnerabilidad CVSS 9.8 NVD

M Crítico vulnerabilidad

25/07/2026

[CVE-2026-64392] In the Linux kernel, the following vulnerability has been resolved: ksmbd: use opener credentials f…

In the Linux kernel, the following vulnerability has been resolved: ksmbd: use opener credentials for delete-on-close Delete-on-close can be completed by deferred or durable handle teardown, where no request work is available. Both the base-file unlink and the ADS xattr removal consequently run with the ksmbd worker credentials and can bypass filesystem permission checks. Run both operations wi…

nvdcriticovulnerabilidad CVSS 9.1 NVD

M Crítico vulnerabilidad

25/07/2026

[CVE-2026-64393] In the Linux kernel, the following vulnerability has been resolved: ksmbd: run set info with opener…

In the Linux kernel, the following vulnerability has been resolved: ksmbd: run set info with opener credentials SMB2 SET_INFO handlers call path-based VFS helpers after checking the access mask granted to the SMB handle. Those helpers perform their owner, inode permission and LSM checks using the current ksmbd worker credentials. Run the complete SET_INFO dispatch with the credentials captured …

nvdcriticovulnerabilidad CVSS 9.1 NVD

M Crítico vulnerabilidad

25/07/2026

[CVE-2026-64383] In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in…

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in SMB2_flush() replay SMB2_flush() keeps its response buffer bookkeeping across replay attempts. If a replayable flush response is received and the retry then fails before cifs_send_recv() stores a replacement response, flush_exit will free the stale response pointer a second time. Reinitialize res…

nvdcriticovulnerabilidad CVSS 9.8 NVD

M Crítico vulnerabilidad

25/07/2026

[CVE-2026-64384] In the Linux kernel, the following vulnerability has been resolved: smb: client: fix change notify …

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix change notify replay double-free A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_notify_init() fails before the next send, cleanup retains the previous buffer type and frees that response again. Reset response bookkeeping before each attempt to prevent the stale fr…

nvdcriticovulnerabilidad CVSS 9.8 NVD

M Crítico vulnerabilidad

25/07/2026

[CVE-2026-64385] In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in…

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in SMB2_ioctl() replay A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_ioctl_init() fails before the next send, cleanup retains the previous buffer type and frees that response again. Reset response bookkeeping before each attempt to prevent the stale f…

nvdcriticovulnerabilidad CVSS 9.8 NVD

M Crítico vulnerabilidad

25/07/2026

[CVE-2026-64386] In the Linux kernel, the following vulnerability has been resolved: smb: client: fix query_info() r…

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix query_info() replay double-free A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_query_info_init() fails before the next send, cleanup retains the previous buffer type and frees that response again. Reset response bookkeeping before each attempt to prevent the stale…

nvdcriticovulnerabilidad CVSS 9.8 NVD

M Crítico vulnerabilidad

25/07/2026

[CVE-2026-64355] In the Linux kernel, the following vulnerability has been resolved: bpf: Reject fragmented frames i…

In the Linux kernel, the following vulnerability has been resolved: bpf: Reject fragmented frames in devmap Devmap broadcast redirects clone the packet for all but the last destination. For native XDP, that clone path copies only the linear xdp_frame data, while fragmented frames keep skb_shared_info in tailroom outside the linear area. Cloning such a frame leaves XDP_FLAGS_HAS_FRAGS set but wi…

nvdcriticovulnerabilidad CVSS 9.8 NVD

M Crítico vulnerabilidad

25/07/2026

[CVE-2026-64319] In the Linux kernel, the following vulnerability has been resolved: nvmet-auth: validate reply mess…

In the Linux kernel, the following vulnerability has been resolved: nvmet-auth: validate reply message payload bounds against transfer length nvmet_auth_reply() accesses the variable-length rval[] array using attacker-controlled hl (hash length) and dhvlen (DH value length) fields without verifying they fit within the allocated buffer of tl bytes. A malicious NVMe-oF initiator can craft a DHCHA…

nvdcriticovulnerabilidad CVSS 9.1 NVD

M Crítico vulnerabilidad

25/07/2026

[CVE-2026-64320] In the Linux kernel, the following vulnerability has been resolved: nvmet: fix pre-auth out-of-boun…

In the Linux kernel, the following vulnerability has been resolved: nvmet: fix pre-auth out-of-bounds heap read in Discovery Get Log Page nvmet_execute_disc_get_log_page() validates only the dword alignment of the host-supplied Log Page Offset (lpo). The 64-bit offset is then added to a small kzalloc'd buffer that holds the discovery log page and the result is passed straight to nvmet_copy_to_s…

nvdcriticovulnerabilidad CVSS 9.1 NVD

M Crítico vulnerabilidad

25/07/2026

[CVE-2026-64303] In the Linux kernel, the following vulnerability has been resolved: spi: fsl-lpspi: terminate the R…

In the Linux kernel, the following vulnerability has been resolved: spi: fsl-lpspi: terminate the RX channel on TX prepare failure path When dmaengine_prep_slave_sg() fails for the TX channel, the error path terminates the TX DMA channel but leaves the RX channel running. Since the RX channel was already submitted and issued prior to preparing the TX descriptor, returning -EINVAL causes the SPI …

nvdcriticovulnerabilidad CVSS 9.8 NVD

M Crítico vulnerabilidad

25/07/2026

[CVE-2026-64268] In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: bound Read Response p…

In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: bound Read Response placement to the RREAD length In drivers/infiniband/sw/siw/siw_qp_rx.c, siw_proc_rresp() places each inbound Read Response DDP segment at sge->laddr + wqe->processed and then accumulates wqe->processed, but it never checks the running total against the sink buffer length on continuation segments. si…

nvdcriticovulnerabilidad CVSS 9.8 NVD