Alertas de Seguridad de la Información

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63812] In the Linux kernel, the following vulnerability has been resolved: f2fs: fix incorrect FI_NO_EXTEN…

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix incorrect FI_NO_EXTENT handling in __destroy_extent_node() When __destroy_extent_node() sets the inode flag FI_NO_EXTENT, it does not reset the length of the largest extent to 0 and update the inode folio. Since modifications to the extent tree are disallowed afterward, the cached largest extent may become stale. This …

nvdaltovulnerabilidad CVSS 7.8 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63813] In the Linux kernel, the following vulnerability has been resolved: Revert "f2fs: remove non-uptoda…

In the Linux kernel, the following vulnerability has been resolved: Revert "f2fs: remove non-uptodate folio from the page cache in move_data_block" This reverts commit 9609dd704725a40cd63d915f2ab6c44248a44598. The kernel panics are keeping to be reported especially when the f2fs partition get almost full. By investigation, we find that the reason is one f2fs page got freed to buddy without bein…

nvdaltovulnerabilidad CVSS 7.8 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63814] In the Linux kernel, the following vulnerability has been resolved: f2fs: validate ACL entry sizes …

In the Linux kernel, the following vulnerability has been resolved: f2fs: validate ACL entry sizes in f2fs_acl_from_disk() f2fs_acl_count() only validates the aggregate ACL xattr length. A malformed ACL can still place ACL_USER or ACL_GROUP in a slot that only contains struct f2fs_acl_entry_short bytes, and f2fs_acl_from_disk() then reads entry->e_id before verifying that a full entry fits. Req…

nvdaltovulnerabilidad CVSS 7.8 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63815] In the Linux kernel, the following vulnerability has been resolved: f2fs: bound i_inline_xattr_size…

In the Linux kernel, the following vulnerability has been resolved: f2fs: bound i_inline_xattr_size for non-inline-xattr inodes When the flexible_inline_xattr feature is enabled, do_read_inode() loads the on-disk i_inline_xattr_size unconditionally: if (f2fs_sb_has_flexible_inline_xattr(sbi)) fi->i_inline_xattr_size = le16_to_cpu(ri->i_inline_xattr_size); but sanity_check_inode() only range…

nvdaltovulnerabilidad CVSS 8.4 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63816] In the Linux kernel, the following vulnerability has been resolved: f2fs: atomic: fix UAF issue on …

In the Linux kernel, the following vulnerability has been resolved: f2fs: atomic: fix UAF issue on f2fs_inode_info.atomic_inode - ioctl(F2FS_IOC_GARBAGE_COLLECT_RANGE) - shrink - f2fs_gc - gc_data_segment - ra_data_block(cow_inode) - mapping = F2FS_I(inode)->atomic_inode->i_mapping : f2fs_is_cow_file(cow_inode) is true - f2fs_evict_inode(atomic_inode) - clear_inode_…

nvdaltovulnerabilidad CVSS 7.8 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63817] In the Linux kernel, the following vulnerability has been resolved: f2fs: validate compress cache i…

In the Linux kernel, the following vulnerability has been resolved: f2fs: validate compress cache inode only when enabled F2FS_COMPRESS_INO() uses NM_I(sbi)->max_nid as the synthetic inode number for the compressed page cache inode. That inode only exists when the compress_cache mount option is enabled. When compress_cache is disabled, max_nid is outside the valid inode range. A corrupted direc…

nvdaltovulnerabilidad CVSS 7.8 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63818] In the Linux kernel, the following vulnerability has been resolved: f2fs: validate orphan inode ent…

In the Linux kernel, the following vulnerability has been resolved: f2fs: validate orphan inode entry count f2fs_recover_orphan_inodes() trusts the orphan block entry_count when replaying orphan inodes from the checkpoint pack. A corrupted entry_count larger than F2FS_ORPHANS_PER_BLOCK makes the recovery loop read past the ino[] array and interpret footer or following data as inode numbers. On …

nvdaltovulnerabilidad CVSS 8.4 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63819] In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on…

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on f2fs_get_node_folio_ra() kernel BUG at fs/f2fs/file.c:845! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5336 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:f2fs_do_trunc…

nvdaltovulnerabilidad CVSS 7.8 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-63804] In the Linux kernel, the following vulnerability has been resolved: gfs2: fix use-after-free in gfs…

In the Linux kernel, the following vulnerability has been resolved: gfs2: fix use-after-free in gfs2_qd_dealloc gfs2_qd_dealloc(), called as an RCU callback from gfs2_qd_dispose(), accesses the superblock object sdp through qd->qd_sbd after freeing qd. It does so to decrement sd_quota_count and wake up sd_kill_wait. However, by the time the RCU callback runs, gfs2_put_super() may have already f…

nvdaltovulnerabilidad CVSS 7.8 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-63805] In the Linux kernel, the following vulnerability has been resolved: crypto: nx - fix nx_crypto_ctx_…

In the Linux kernel, the following vulnerability has been resolved: crypto: nx - fix nx_crypto_ctx_exit argument nx_crypto_ctx_shash_exit calls nx_crypto_ctx_exit with crypto_shash_ctx(...) but crypto_shash_ctx gives a nx_crypto_ctx *, not a crypto_tfm *. Fix the type in nx_crypto_ctx_exit and drop the bogus crypto_tfm_ctx call. This fixes the following oops: BUG: Unable to handle kernel da…

nvdaltovulnerabilidad CVSS 7.8 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-63806] In the Linux kernel, the following vulnerability has been resolved: KVM: Replace guest-triggerable …

In the Linux kernel, the following vulnerability has been resolved: KVM: Replace guest-triggerable BUG_ON() in ioeventfd datamatch with get_unaligned() Drop a BUG_ON() that has been reachable since it was first added, way back in 2009, and instead use get_unaligned() to perform potentially-unaligned accesses. For a given store, KVM x86's emulator tracks the entire value in the destination opera…

nvdaltovulnerabilidad CVSS 7.1 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-63807] In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: Ensure hugepage i…

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: Ensure hugepage is in by slot before checking max mapping level When recovering hugepages in the shadow MMU, verify that the base gfn of the shadow page is actually contained within the target memslot, *before* querying the max mapping level given the shadow page's gfn. Failure to pre-check the validity of the gfn…

nvdaltovulnerabilidad CVSS 8.8 NVD

M Crítico vulnerabilidad

19/07/2026

[CVE-2026-63808] In the Linux kernel, the following vulnerability has been resolved: exfat: fix potential use-after-…

In the Linux kernel, the following vulnerability has been resolved: exfat: fix potential use-after-free in exfat_find_dir_entry() In exfat_find_dir_entry(), the buffer_head obtained from exfat_get_dentry() is released with brelse(bh) before the fall-through TYPE_EXTEND branch reads the directory entry through ep (which points into bh->b_data): brelse(bh); if (entry_type == TYPE_EXTEND) { ..…

nvdcriticovulnerabilidad CVSS 9.8 NVD

M Alto vulnerabilidad

19/07/2026

[CVE-2026-63809] In the Linux kernel, the following vulnerability has been resolved: bpf: use kvfree() for replaced …

In the Linux kernel, the following vulnerability has been resolved: bpf: use kvfree() for replaced sysctl write buffer proc_sys_call_handler() allocates its temporary sysctl buffer with kvzalloc() and passes it to __cgroup_bpf_run_filter_sysctl(). Since kvzalloc() may fall back to vmalloc() for large allocations, freeing that buffer with kfree() is wrong and can corrupt memory. Use kvfree() to …

nvdaltovulnerabilidad CVSS 7.8 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-63796] In the Linux kernel, the following vulnerability has been resolved: ocfs2: reject oversized group b…

In the Linux kernel, the following vulnerability has been resolved: ocfs2: reject oversized group bitmap descriptors ocfs2_validate_gd_parent() only bounds bg_bits against the parent allocator's chain geometry. A malicious descriptor can still claim a bg_size/bg_bits pair that exceeds the bitmap bytes that physically fit in the group descriptor block, so later bitmap scans and bit updates can r…

nvdaltovulnerabilidad CVSS 8.8 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-63797] In the Linux kernel, the following vulnerability has been resolved: rpmsg: char: Fix use-after-free…

In the Linux kernel, the following vulnerability has been resolved: rpmsg: char: Fix use-after-free on probe error path rpmsg_chrdev_probe() stores the newly allocated eptdev in the default endpoint's priv pointer before calling rpmsg_chrdev_eptdev_add(). If rpmsg_chrdev_eptdev_add() then fails, its error path frees eptdev while the default endpoint may still dispatch callbacks with the stale pr…

nvdaltovulnerabilidad CVSS 8.4 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-63799] In the Linux kernel, the following vulnerability has been resolved: sched/mmcid: Fix OOB clear_bit …

In the Linux kernel, the following vulnerability has been resolved: sched/mmcid: Fix OOB clear_bit when CID is MM_CID_UNSET in fixup path In mm_cid_fixup_cpus_to_tasks(), when rq->curr has the target mm and mm_cid.active is set, the CID is checked with cid_in_transit() before setting the transition bit. In per-CPU mode a newly forked or exec'd task can be running with mm_cid.cid == MM_CID_UNSET…

nvdaltovulnerabilidad CVSS 7.8 NVD

L Crítico vulnerabilidad

19/07/2026

[CVE-2026-63800] In the Linux kernel, the following vulnerability has been resolved: pNFS: Fix use-after-free in pnf…

In the Linux kernel, the following vulnerability has been resolved: pNFS: Fix use-after-free in pnfs_update_layout() When hitting the NFS_LAYOUT_RETURN branch in pnfs_update_layout(), the code calls pnfs_prepare_to_retry_layoutget(lo). If it succeeds, pnfs_put_layout_hdr(lo) is called before trace_pnfs_update_layout(), which still references 'lo'. This results in a use-after-free when the tracep…

nvdcriticovulnerabilidad CVSS 9.8 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-63801] In the Linux kernel, the following vulnerability has been resolved: tipc: fix slab-use-after-free R…

In the Linux kernel, the following vulnerability has been resolved: tipc: fix slab-use-after-free Read in tipc_aead_decrypt_done tipc_aead_decrypt() goes straight from tipc_bearer_hold(b) to crypto_aead_decrypt(req) without taking a reference on the netns, unlike the encrypt path. When crypto_aead_decrypt() is offloaded asynchronously (e.g. the SIMD aead wrapper queuing to cryptd), the cryptd wo…

nvdaltovulnerabilidad CVSS 8.8 NVD

L Alto vulnerabilidad

19/07/2026

[CVE-2026-63802] In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: fix UAF in __blkcg_…

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: fix UAF in __blkcg_rstat_flush() When multiple blkgs in the same blkcg are released concurrently, a use-after-free can occur. The race happens when one blkg's __blkcg_rstat_flush() removes another blkg's iostat entries via llist_del_all(). The second blkg sees an empty list and proceeds to free itself while the first…

nvdaltovulnerabilidad CVSS 7.8 NVD