CVE-2023-53200

Root has patched CVE-2023-53200 in the linux package for Root:Debian:11. Multiple fixed versions available.

In the Linux kernel, the following vulnerability has been resolved: netfilter: x_tables: fix percpu counter block leak on error path when creating new netns Here is the stack where we allocate percpu counter block: +-< __alloc_percpu +-< xt_percpu_counter_alloc +-< find_check_entry # {arp,ip,ip6}_tables.c +-< translate_table And it can be leaked on this code path: +-> ip6t_register_table +-> translate_table # allocates percpu counter block +-> xt_register_table # fails there is no freeing of the counter block on xt_register_table fail. Note: xt_percpu_counter_free should be called to free it like we do in do_replace through cleanup_entry helper (or in __ip6t_unregister_table). Probability of hitting this error path is low AFAICS (xt_register_table can only return ENOMEM here, as it is not replacing anything, as we are creating new netns, and it is hard to imagine that all previous allocations succeeded and after that one in xt_register_table failed). But it's worth fixing even the rare leak.

• crypto: algif_aead - Fix minimum RX size check for decryption {CVE-2026-31431}
• crypto: af_alg - Fix page reassignment overflow in af_alg_pull_tsgl {CVE-2026-31431}
• crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec {CVE-2026-31431}
• crypto: authencesn - Fix src offset when decrypting in-place {CVE-2026-31431}
• crypto: authencesn - Do not place hiseq at end of dst for out-of-place decryption {CVE-2026-31431}
• crypto: authenc - use memcpy_sglist() instead of null skcipher {CVE-2026-31431}
• crypto: algif_aead - snapshot IV for async AEAD requests {CVE-2026-31431}
• crypto: algif_aead - Revert to operating out-of-place {CVE-2026-31431}
• crypto: algif_aead - use memcpy_sglist() instead of null skcipher {CVE-2026-31431}
• crypto: scatterwalk - Backport memcpy_sglist() {CVE-2026-31431}
• wifi: brcmfmac: Fix potential shift-out-of-bounds in brcmf_fw_alloc_request() {CVE-2022-50551}
• bonding: limit BOND_MODE_8023AD to Ethernet devices {CVE-2026-23099}
• libceph: make decode_pool() more resilient against corrupted osdmaps {CVE-2025-71116}
• scsi: qla2xxx: Fix bsg_done() causing double free {CVE-2025-71238}
• ftrace: Fix use-after-free for dynamic ftrace_ops {CVE-2022-49892}
• intel_th: msu: Fix vmalloced buffers {CVE-2022-50142}
• vt: Clear selection before changing the font {CVE-2022-49948}
• ACPICA: Fix error code path in acpi_ds_call_control_method() {CVE-2022-50411}
• usbnet: Run unregister_netdev() before unbind_all() {CVE-2022-50220}
• ipvs: fix WARNING in ip_vs_app_net_cleanup() {CVE-2022-49917}
• bpf: Propagate error from htab_lock_bucket() to userspace {CVE-2022-50490}
• binfmt_misc: fix shift-out-of-bounds in check_special_flags {CVE-2022-50497}
• module: fix [e_shstrndx].sh_size=0 OOB access {CVE-2022-49444}
• ceph: avoid putting the realm twice when decoding snaps fails {CVE-2022-49770}
• tracing: Fix potential double free in create_var_ref() {CVE-2022-49410}
• powercap: intel_rapl: fix UBSAN shift-out-of-bounds issue {CVE-2022-50366}
• Bluetooth: hci_sysfs: Fix attempting to call device_add multiple times {CVE-2022-50419}
• xsk: Fix xsk_diag use-after-free error during socket cleanup {CVE-2023-53426}
• svcrdma: bound check rq_pages index in inline path {CVE-2025-71068}
• net: hns3: add VLAN id validation before using {CVE-2025-71112}
• net: mdio: fix undefined behavior in bit shift for __mdiobus_register {CVE-2022-49907}
• capabilities: fix undefined behavior in bit shift for CAP_TO_MASK {CVE-2022-49870}
• ata: ahci: Match EM_MAX_SLOTS with SATA_PMP_MAX_PORTS {CVE-2022-50315}
• i2c: piix4: Fix adapter not be removed in piix4_remove() {CVE-2022-49900}
• team: fix check for port enabled in team_queue_override_port_prio_changed() {CVE-2025-71091}
• staging: vme_user: Fix possible UAF in tsi148_dma_list_add {CVE-2022-50384}
• ALSA: ctxfi: Fix potential OOB access in audio mixer handling {CVE-2026-23076}
• ftrace: Add cond_resched() to ftrace_graph_set_hash() {CVE-2025-37940}
• net: stmmac: Fix accessing freed irq affinity_hint {CVE-2025-23155}
• ext4: set goal start correctly in ext4_mb_normalize_request {CVE-2023-54021}
• netfilter: ipset: fix region locking in hash types {CVE-2025-37997}
• openvswitch: Fix unsafe attribute parsing in output_userspace() {CVE-2025-37998}
• wifi: brcm80211: fmac: Add error handling for brcmf_usb_dl_writeimage() {CVE-2025-37990}
• nfs: handle failure of nfs_get_lock_context in unlock path {CVE-2025-38023}
• drm/amd/pm: Prevent division by zero {CVE-2025-37767}
• netfilter: ctnetlink: remove refcounting in expectation dumpers {CVE-2025-39764}
• tracing: Fix null pointer dereference in tracing_err_log_open() {CVE-2023-53167}
• ACPICA: Refuse to evaluate a method if arguments are missing {CVE-2025-38386}
• scsi: qla2xxx: Pointer may be dereferenced {CVE-2023-53150}
• net: pktgen: fix access outside of user given buffer in pktgen_thread_write() {CVE-2025-38061}
• dm cache: prevent BUG_ON by blocking retries on failed device resumes {CVE-2025-38066} -…

• smb: client: reject userspace cifs.spnego descriptions
• usb: ulpi: fix memory leak on ulpi_register() error paths
• usb: ulpi: fix double free in ulpi_register_interface() error path {CVE-2026-31759}
• mptcp: consolidate suboption status {CVE-2025-21707}
• blktrace: fix __this_cpu_read/write in preemptible context {CVE-2026-23374}
• espintcp: remove encap socket caching to avoid reference leak {CVE-2025-38097}
• net: usb: asix: validate PHY address before use {CVE-2025-71094}
• driver: iio: add missing checks on iio_info's callback access {CVE-2024-46715}
• net: can: j1939: j1939_xtp_rx_rts_session_active(): deactivate session upon receiving the second rts {CVE-2026-22997}
• crypto: af_alg - Set merge to zero early in af_alg_sendmsg {CVE-2025-39931}
• bonding: fix use-after-free due to enslave fail after slave array update {CVE-2026-23171}
• Input: gpio-keys - fix a sleep while atomic with PREEMPT_RT {CVE-2025-38335}
• spi: spi-fsl-lpspi: fix teardown order issue (UAF) {CVE-2026-31485}
• mm/smaps: fix race between smaps_hugetlb_range and migration {CVE-2025-39754}
• vxlan: Fix NPD in {arp,neigh}_reduce() when using nexthop objects {CVE-2025-39850}
• mm/userfaultfd: fix hugetlb fault mutex hash calculation {CVE-2026-31575}
• RDMA/irdma: Initialize free_qp completion before using it {CVE-2026-31492}
• calipso: Don't call calipso functions for AF_INET sk. {CVE-2025-38147}
• mm/ksm: fix flag-dropping behavior in ksm_madvise {CVE-2025-40040}
• espintcp: fix skb leaks {CVE-2025-38057}
• net: cdc_ncm: Deal with too low values of dwNtbOutMaxSize {CVE-2023-53667}
• memcg: fix soft lockup in the OOM process {CVE-2024-57977}
• futex: Clear stale exiting pointer in futex_lock_pi() retry path {CVE-2026-31555}
• trace_events_hist: add check for return value of 'create_hist_field' {CVE-2023-53005}
• dm-verity: disable recursive forward error correction {CVE-2025-71161}
• Bluetooth: L2CAP: Fix accepting multiple L2CAP_ECRED_CONN_REQ {CVE-2026-23395}
• vfs: Don't evict inode under the inode lru traversing context {CVE-2024-45003}
• ipvs: fix uninit-value for saddr in do_output_route4 {CVE-2025-37961}
• sctp: add mutual exclusion in proc_sctp_do_udp_port() {CVE-2025-22062}
• net: phy: leds: fix memory leak {CVE-2025-37989}
• x86/cpu/hygon: Add missing resctrl_cpu_detect() in bsp_init helper {CVE-2025-39681}
• tls: Use __sk_dst_get() and dst_dev_rcu() in get_netdev_for_sock(). {CVE-2025-40149}
• netfilter: ctnetlink: remove refcounting in expectation dumpers {CVE-2025-39764}
• sctp: sysctl: auth_enable: avoid using current->nsproxy {CVE-2025-21638}
• kobject: Add sanity check for kset->kobj.ktype in kset_register() {CVE-2023-53480}
• io_uring: check if iowq is killed before queuing {CVE-2024-56709}
• netfilter: x_tables: fix percpu counter block leak on error path when creating new netns {CVE-2023-53200}
• ubi: ubi_wl_put_peb: Fix infinite loop when wear-leveling work failed {CVE-2023-53481}
• udf: Do not update file length for failed writes to inline files {CVE-2023-53295}
• bpf: Forget ranges when refining tnum after JSET {CVE-2025-39748}
• perf/core: Exit early on perf_mmap() fail {CVE-2025-38565}
• misc: vmw_balloon: fix memory leak with using debugfs_lookup() {CVE-2023-53279}
• can: bcm: bcm_tx_setup(): fix KMSAN uninit-value in vfs_write {CVE-2023-53344}
• tracing: Fix race issue between cpu buffer write and swap {CVE-2023-53368}
• KVM: x86: Acquire SRCU in KVM_GET_MP_STATE to protect guest memory accesses {CVE-2025-23141}
• io_uring/tctx: work around xa_store() allocation error issue {CVE-2024-56584}
• objtool: Fix memory leak in create_static_call_sections() {CVE-2023-53423}
• net: bcmgenet: Add a check for oversized packets {CVE-2023-53535}
• ext4: remove a BUG_ON in ext4_mb_release_group_pa() {CVE-2023-53450}
• PM: EM: fix memory leak with using debugfs_lookup() {CVE-2023-53411}
• ALSA: usb-audio: Use correct version for UAC3 header validation {CVE-2026-23318}
• watchdog: Fix kmemleak in watchdog_cdev_register {CVE-2023-53234} -…

In the Linux kernel, the following vulnerability has been resolved:

netfilter: x_tables: fix percpu counter block leak on error path when creating new netns

Here is the stack where we allocate percpu counter block:

+-< __alloc_percpu +-< xt_percpu_counter_alloc +-< find_check_entry # {arp,ip,ip6}_tables.c +-< translate_table

And it can be leaked on this code path:

+-> ip6t_register_table +-> translate_table # allocates percpu counter block +-> xt_register_table # fails

there is no freeing of the counter block on xt_register_table fail. Note: xt_percpu_counter_free should be called to free it like we do in do_replace through cleanup_entry helper (or in __ip6t_unregister_table).

Probability of hitting this error path is low AFAICS (xt_register_table can only return ENOMEM here, as it is not replacing anything, as we are creating new netns, and it is hard to imagine that all previous allocations succeeded and after that one in xt_register_table failed). But it's worth fixing even the rare leak.