Linux vulnerabilities
We track 3,714 vulnerabilities in Linux products across 5 products. 3,710 are rated high or critical, and 32 have been exploited in real attacks. The most recent was published on October 15, 2026.
Latest Linux vulnerabilities
- 7.1 High severity
Linux: Out-of-bounds Write
In the Linux kernel, the following vulnerability has been resolved: xsk: validate user input for XDP_{UMEM|COMPLETION}_FILL_RING syzbot reported an illegal copy in xsk_setsockopt() [1] Make sure to validate setsockopt() @optlen parameter. [1] BUG: KASAN: slab-
- 8.8 High severity
Linux: Allocation of Resources Without Limits or Throttling
In the Linux kernel, the following vulnerability has been resolved: ipv6: fix race condition between ipv6_get_ifaddr and ipv6_del_addr Although ipv6_get_ifaddr walks inet6_addr_lst under the RCU lock, it still means hlist_for_each_entry_rcu can return an item
- 7.1 High severity
Linux: Out-of-bounds Read
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: SCO: Fix not validating setsockopt user input syzbot reported sco_sock_setsockopt() is copying data without checking user input length. BUG: KASAN: slab-out-of-bounds in copy_from_s
- 7.1 High severity
Linux: Out-of-bounds Read
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: RFCOMM: Fix not validating setsockopt user input syzbot reported rfcomm_sock_setsockopt_old() is copying data without checking user input length. BUG: KASAN: slab-out-of-bounds in c
- 7.1 High severity
Linux: Improper Validation of Specified Quantity in Input
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix not validating setsockopt user input Check user input length before copying data.
- 7.1 High severity
Linux: Improper Validation of Specified Quantity in Input
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: Fix not validating setsockopt user input Check user input length before copying data.
- 7.1 High severity
Linux: Improper Validation of Specified Quantity in Input
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sock: Fix not validating setsockopt user input Check user input length before copying data.
- 9.1 Critical severity
Linux: NULL Pointer Dereference
In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Properly link new fs rules into the tree Previously, add_rule_fg would only add newly created rules from the handle into the tree when they had a refcount of 1. On the other hand, cr
- 8.8 High severity
Linux: Use After Free
In the Linux kernel, the following vulnerability has been resolved: kprobes: Fix possible use-after-free issue on kprobe registration When unloading a module, its state is changing MODULE_STATE_LIVE -> MODULE_STATE_GOING -> MODULE_STATE_UNFORMED. Each change w
- 7.8 High severity
Linux: Out-of-bounds Write
In the Linux kernel, the following vulnerability has been resolved: btrfs: make sure that WRITTEN is set on all metadata blocks We previously would call btrfs_check_leaf() if we had the check integrity code enabled, which meant that we could only run the exten
- 7.8 High severity
Linux: Uncontrolled Resource Consumption
In the Linux kernel, the following vulnerability has been resolved: bcachefs: Check for journal entries overruning end of sb clean section Fix a missing bounds check in superblock validation. Note that we don't yet have repair code for this case - repair code
- 7.1 High severity
Linux: Out-of-bounds Read
In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: check A-MSDU format more carefully If it looks like there's another subframe in the A-MSDU but the header isn't fully there, we can end up reading data out of bounds, only to d
- 7.8 High severity
Linux: Use After Free
In the Linux kernel, the following vulnerability has been resolved: drm/vc4: don't check if plane->state->fb == state->fb Currently, when using non-blocking commits, we can see the following kernel warning: [ 110.908514] ------------[ cut here ]------------ [
- 7.8 High severity
Linux: Use After Free
In the Linux kernel, the following vulnerability has been resolved: media: mediatek: vcodec: Fix oops when HEVC init fails The stateless HEVC decoder saves the instance pointer in the context regardless if the initialization worked or not. This caused a use af
- 7.8 High severity
Linux: NULL Pointer Dereference
In the Linux kernel, the following vulnerability has been resolved: media: mediatek: vcodec: adding lock to protect encoder context list Add a lock for the ctx_list, to avoid accessing a NULL pointer within the 'vpu_enc_ipi_handler' function when the ctx_list
- 7.8 High severity
Linux: Out-of-bounds Write
In the Linux kernel, the following vulnerability has been resolved: ice: fix memory corruption bug with suspend and rebuild The ice driver would previously panic after suspend. This is caused from the driver *only* calling the ice_vsi_free_q_vectors() function
- 7.8 High severity
Linux: Improper Validation of Array Index
In the Linux kernel, the following vulnerability has been resolved: bpf: Protect against int overflow for stack access size This patch re-introduces protection against the size of access to stack memory being negative; the access size can appear negative as a
- 7.3 High severity
Linux: Concurrent Execution using Shared Resource with Improper Synchronization
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: flush pending destroy work before exit_net release Similar to 2c9f0293280e ("netfilter: nf_tables: flush pending destroy work before netlink notifier") to address a race
- 7.0 High severity
Linux: Concurrent Execution using Shared Resource with Improper Synchronization
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: Fix potential data-race in __nft_flowtable_type_get() nft_unregister_flowtable_type() within nf_flow_inet_module_exit() can concurrent with __nft_flowtable_type_get() wit
- 7.1 High severity
Linux: Out-of-bounds Read
In the Linux kernel, the following vulnerability has been resolved: netfilter: validate user input for expected length I got multiple syzbot reports showing old bugs exposed by BPF after commit 20f2505fb436 ("bpf: Try to avoid kzalloc in cgroup/{s,g}etsockopt"
- 7.3 High severity
Linux: Use of Uninitialized Resource
In the Linux kernel, the following vulnerability has been resolved: erspan: make sure erspan_base_hdr is present in skb->head syzbot reported a problem in ip6erspan_rcv() [1] Issue is that ip6erspan_rcv() (and erspan_rcv()) no longer make sure erspan_base_hdr
- 7.8 High severity
Linux: Use After Free
In the Linux kernel, the following vulnerability has been resolved: ax25: fix use-after-free bugs caused by ax25_ds_del_timer When the ax25 device is detaching, the ax25_dev_device_down() calls ax25_ds_del_timer() to cleanup the slave_timer. When the timer han
- 7.8 High severity
Linux: Uncontrolled Recursion
In the Linux kernel, the following vulnerability has been resolved: ipv6: Fix infinite recursion in fib6_dump_done(). syzkaller reported infinite recursive calls of fib6_dump_done() during netlink socket destruction. [1] From the log, syzkaller sent an AF_UNSP
- 9.8 Critical severity
Linux: Use After Free
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix UAF in smb2_reconnect_server() The UAF bug is due to smb2_reconnect_server() accessing a session that is already being teared down by another thread that is executing __cifs_p
- 9.8 Critical severity
Linux: Use After Free
In the Linux kernel, the following vulnerability has been resolved: smb: client: guarantee refcounted children from parent session Avoid potential use-after-free bugs when walking DFS referrals, mounting and performing DFS failover by ensuring that all childre
- 7.8 High severity
Linux: Use After Free
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF in cifs_stats_proc_write() Skip sessions that are being teared down (status == SES_EXITING) to avoid UAF.
- 7.8 High severity
Linux: Use After Free
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF in cifs_stats_proc_show() Skip sessions that are being teared down (status == SES_EXITING) to avoid UAF.
- 7.8 High severity
Linux: Use After Free
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF in cifs_dump_full_key() Skip sessions that are being teared down (status == SES_EXITING) to avoid UAF.
- 9.8 Critical severity
Linux: Use After Free
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF in smb2_is_valid_oplock_break() Skip sessions that are being teared down (status == SES_EXITING) to avoid UAF.
- 7.8 High severity
Linux: Use After Free
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF in smb2_is_valid_lease_break() Skip sessions that are being teared down (status == SES_EXITING) to avoid UAF.
- 7.8 High severity
Linux: Use After Free
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF in is_valid_oplock_break() Skip sessions that are being teared down (status == SES_EXITING) to avoid UAF.
- 7.8 High severity
Linux: Use After Free
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF in smb2_is_network_name_deleted() Skip sessions that are being teared down (status == SES_EXITING) to avoid UAF.
- 7.8 High severity
Linux: Use After Free
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF in cifs_signal_cifsd_for_reconnect() Skip sessions that are being teared down (status == SES_EXITING) to avoid UAF.
- 7.5 High severity
Linux: NULL Pointer Dereference
In the Linux kernel, the following vulnerability has been resolved: icmp: prevent possible NULL dereferences from icmp_build_probe() First problem is a double call to __in_dev_get_rcu(), because the second one could return NULL. if (__in_dev_get_rcu(dev) && __
- 7.8 High severity
Linux: Double Free
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btusb: mediatek: Fix double free of skb in coredump hci_devcd_append() would free the skb on error so the caller don't have to free it again otherwise it would cause the double free
- 7.8 High severity
Linux: Use After Free
In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum_acl_tcam: Fix possible use-after-free during activity update The rule activity update delayed work periodically traverses the list of configured rules and queries their activit
- 7.8 High severity
Linux: Use After Free
In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum_acl_tcam: Fix possible use-after-free during rehash The rehash delayed work migrates filters from one region to another according to the number of available credits. The migrat
- 7.1 High severity
Linux: Use of Uninitialized Resource
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix information leak in btrfs_ioctl_logical_to_ino() Syzbot reported the following information leak for in btrfs_ioctl_logical_to_ino(): BUG: KMSAN: kernel-infoleak in instrument_copy_t
- 7.8 High severity
Linux: Double Free
In the Linux kernel, the following vulnerability has been resolved: irqchip/gic-v3-its: Prevent double free on error The error handling path in its_vpe_irq_domain_alloc() causes a double free when its_vpe_init() fails after successfully allocating at least one
- 9.1 Critical severity
Linux: Use of Externally-Controlled Format String
In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: dbg-tlv: ensure NUL termination The iwl_fw_ini_debug_info_tlv is used as a string, so we must ensure the string is terminated correctly before using it.