Alertas de Seguridad de la Información

L Alto vulnerabilidad

19/07/2026

[CVE-2026-53402] In the Linux kernel, the following vulnerability has been resolved: fbdev: fbcon: fix out-of-bounds…

In the Linux kernel, the following vulnerability has been resolved: fbdev: fbcon: fix out-of-bounds read in err_out of fbcon_do_set_font() When fbcon_do_set_font() fails (e.g., due to a memory allocation failure inside vc_resize() under heavy memory pressure), it jumps to the `err_out` label to roll back the console state. However, the current rollback logic forgets to restore the `hi_font` stat…

nvdaltovulnerabilidad CVSS 7.1 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-63793] In the Linux kernel, the following vulnerability has been resolved: ntfs: serialize volume label ac…

In the Linux kernel, the following vulnerability has been resolved: ntfs: serialize volume label accesses Protect vol->volume_label with a mutex and snaphost the label before copy_to_user. This prevent a use-after-free when FS_IOC_SETFSLABEL replaces the vol->volume_label and FS_IOC_GETTSLABEL reads it concurrently.

nvdaltovulnerabilidad CVSS 7.8 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-63794] In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Fix page overflow in …

In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Fix page overflow in sev_dbg_crypt() for ENCRYPT path In sev_dbg_crypt(), the per-iteration transfer length is bounded by the source page offset (PAGE_SIZE - s_off) but not by the destination page offset (PAGE_SIZE - d_off). When d_off > s_off, the encrypt path (__sev_dbg_encrypt_user) performs a read-modify-write usi…

nvdaltovulnerabilidad CVSS 7.8 NVD

L Crítico vulnerabilidad

19/07/2026

[CVE-2026-63795] In the Linux kernel, the following vulnerability has been resolved: 9p: avoid putting oldfid in p9_…

In the Linux kernel, the following vulnerability has been resolved: 9p: avoid putting oldfid in p9_client_walk() error path When p9_client_walk() is called with clone set to false, fid aliases oldfid. If the walk subsequently fails after the request has been sent, the error path jumps to clunk_fid, which currently calls p9_fid_put(fid) unconditionally. This drops a reference to oldfid even thou…

nvdcriticovulnerabilidad CVSS 10.0 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-53390] In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix out-of-bounds read i…

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix out-of-bounds read in smb_check_perm_dacl() The permission-check ACE walk in smb_check_perm_dacl() validates the ACE header size and caps sid.num_subauth at SID_MAX_SUB_AUTHORITIES, but it never checks that ace->size is actually large enough to contain num_subauth sub-authorities before compare_sids() dereferences the…

nvdaltovulnerabilidad CVSS 8.1 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-53391] In the Linux kernel, the following vulnerability has been resolved: NFSv4/pNFS: reject zero-length …

In the Linux kernel, the following vulnerability has been resolved: NFSv4/pNFS: reject zero-length r_addr in nfs4_decode_mp_ds_addr nfs4_decode_mp_ds_addr() decodes the r_netid and r_addr opaques of a netaddr4 from a GETDEVICEINFO multipath-DS body, then immediately calls strrchr(buf, '.') to locate the port separator. Both decodes use xdr_stream_decode_string_dup(), and the current code checks …

nvdaltovulnerabilidad CVSS 7.5 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-53392] In the Linux kernel, the following vulnerability has been resolved: NFSv4/flexfiles: reject zero fi…

In the Linux kernel, the following vulnerability has been resolved: NFSv4/flexfiles: reject zero filehandle version count ff_layout_alloc_lseg() decodes the filehandle-version array count from the flexfiles layout body. The value is used as the count for kzalloc_objs(), and the current code only rejects NULL. A zero count yields ZERO_SIZE_PTR, which can be stored in dss_info->fh_versions even t…

nvdaltovulnerabilidad CVSS 7.5 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-53394] In the Linux kernel, the following vulnerability has been resolved: nfsd: avoid leaking pre-allocat…

In the Linux kernel, the following vulnerability has been resolved: nfsd: avoid leaking pre-allocated openowner on unconfirmed retry race When find_or_alloc_open_stateowner() encounters an unconfirmed owner, it calls release_openowner() and sets oo = NULL. Control then falls through past the `if (oo)` guard -- which would have freed any pre-allocated `new` -- and unconditionally executes `new = …

nvdaltovulnerabilidad CVSS 7.5 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-53395] In the Linux kernel, the following vulnerability has been resolved: nfsd: fix dead ACL conflict gua…

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix dead ACL conflict guard in nfsd4_create nfsd4_create() steals create->cr_dpacl/cr_pacl into the local nfsd_attrs via the designated initializer, then immediately sets the source pointers to NULL. The subsequent conflict guard tests the already-nilled source fields, making it permanently dead code: if (create->cr_a…

nvdaltovulnerabilidad CVSS 7.5 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-53396] In the Linux kernel, the following vulnerability has been resolved: nfsd: fix posix_acl leak and ig…

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix posix_acl leak and ignored error in nfsd4_create_file nfsd4_create_file() has two bugs in its ACL handling: The return value of nfsd4_acl_to_attr() is silently discarded. When the NFSv4-to-POSIX ACL conversion fails (e.g., -EINVAL for unsupported ACE types), the file is created without any ACL and the client receives…

nvdaltovulnerabilidad CVSS 7.1 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-53397] In the Linux kernel, the following vulnerability has been resolved: nfsd: fix posix_acl leak on SET…

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix posix_acl leak on SETACL decode failure nfsaclsvc_decode_setaclargs() and nfs3svc_decode_setaclargs() each call nfs_stream_decode_acl() twice, first for NFS_ACL and then for NFS_DFACL. Each successful call transfers ownership of a freshly allocated posix_acl into argp->acl_access or argp->acl_default. If the first ca…

nvdaltovulnerabilidad CVSS 7.5 NVD

L Crítico vulnerabilidad

19/07/2026

[CVE-2026-53398] In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix SECINFO_NO_NAME decod…

In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix SECINFO_NO_NAME decode error cleanup nfsd4_decode_secinfo_no_name() currently initializes sin_exp after decoding sin_style. If the XDR stream is truncated, the decoder returns nfserr_bad_xdr before sin_exp is initialized. Since commit 3fdc54646234 ("NFSD: Reduce amount of struct nfsd4_compoundargs that needs clearing"…

nvdcriticovulnerabilidad CVSS 9.8 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-53383] In the Linux kernel, the following vulnerability has been resolved: ksmbd: reject non-VALID session…

In the Linux kernel, the following vulnerability has been resolved: ksmbd: reject non-VALID session in compound request branch smb2_check_user_session() takes a shortcut for any operation that is not the first in a COMPOUND request: it reuses work->sess (the session bound by the first operation) and validates only the SessionId, then returns "valid". It never re-checks work->sess->state == SMB2_…

nvdaltovulnerabilidad CVSS 7.5 NVD

L Crítico vulnerabilidad

19/07/2026

[CVE-2026-53384] In the Linux kernel, the following vulnerability has been resolved: serial: 8250_dw: unregister 825…

In the Linux kernel, the following vulnerability has been resolved: serial: 8250_dw: unregister 8250 port if clk_notifier_register() fails dw8250_probe() registers the 8250 port via serial8250_register_8250_port() and then, if the device has a clock, registers a clock notifier. If clk_notifier_register() fails, probe returns the error but leaves the 8250 port registered. The matching serial8250_…

nvdcriticovulnerabilidad CVSS 9.8 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-53386] In the Linux kernel, the following vulnerability has been resolved: iio: adc: ti-ads1298: add bound…

In the Linux kernel, the following vulnerability has been resolved: iio: adc: ti-ads1298: add bounds check to pga_settings index ads1298_pga_settings has 7 elements but ADS1298_MASK_CH_PGA can yield values 0-7. If it yields a value >= 7, this causes an out-of-bounds array access. Add a bounds check and return -EINVAL if the index is out of range. Note that the remaining value b111 is reserved s…

nvdaltovulnerabilidad CVSS 7.8 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-53387] In the Linux kernel, the following vulnerability has been resolved: iio: light: veml6075: add bound…

In the Linux kernel, the following vulnerability has been resolved: iio: light: veml6075: add bounds check to veml6075_it_ms index veml6075_it_ms has 5 elements but VEML6075_CONF_IT can yield values 0-7. If it returns a value >= 5, this causes an out-of-bounds array access. Add a bounds check and return -EINVAL if the index is out of range. The problem values are reserved so should never be rea…

nvdaltovulnerabilidad CVSS 7.1 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-53388] In the Linux kernel, the following vulnerability has been resolved: fuse: re-lock request before re…

In the Linux kernel, the following vulnerability has been resolved: fuse: re-lock request before replacing page cache folio fuse_try_move_folio() unlocks the request on entry but does not re-lock it on the success path. This means fuse_chan_abort() can end the request and free the fuse_io_args (eg fuse_readpages_end()) while the subsequent copy chain logic after fuse_try_move_folio() accesses th…

nvdaltovulnerabilidad CVSS 7.8 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-53389] In the Linux kernel, the following vulnerability has been resolved: net/tcp-ao: fix use-after-free …

In the Linux kernel, the following vulnerability has been resolved: net/tcp-ao: fix use-after-free of key in del_async path In tcp_ao_delete_key(), the del_async path skips the current_key and rnext_key validity checks present in the synchronous path, assuming these pointers are always NULL on LISTEN sockets. However, if a key was added with set_current=1/set_rnext=1 while the socket was in CLO…

nvdaltovulnerabilidad CVSS 7.8 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-53381] In the Linux kernel, the following vulnerability has been resolved: virtiofs: fix UAF on submount u…

In the Linux kernel, the following vulnerability has been resolved: virtiofs: fix UAF on submount umount iput() called from fuse_release_end() can Oops if the super block has already been destroyed. Normally this is prevented by waiting for num_waiting to go down to zero before commencing with super block shutdown. This only works, however, for the last submount instance, as the wait counter i…

nvdaltovulnerabilidad CVSS 7.8 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-53380] In the Linux kernel, the following vulnerability has been resolved: media: rzv2h-ivc: Fix concurren…

In the Linux kernel, the following vulnerability has been resolved: media: rzv2h-ivc: Fix concurrent buffer list access The list of buffers (`rzv2h_ivc::buffers.queue`) is protected by a spinlock (`rzv2h_ivc::buffers.lock`). However, in `rzv2h_ivc_transfer_buffer()`, which runs in a separate workqueue, the `list_del()` call is executed without holding the spinlock, which makes it possible for th…

nvdaltovulnerabilidad CVSS 7.8 NVD