CVE-2026-31629

In the Linux kernel, the following vulnerability has been resolved: nfc: llcp: add missing return after LLCP_CLOSED checks In nfc_llcp_recv_hdlc() and nfc_llcp_recv_disc(), when the socket state is LLCP_CLOSED, the code correctly calls release_sock() and nfc_llcp_sock_put() but fails to return. Execution falls through to the remainder of the function, which calls release_sock() and nfc_llcp_sock_put() again. This results in a double release_sock() and a refcount underflow via double nfc_llcp_sock_put(), leading to a use-after-free. Add the missing return statements after the LLCP_CLOSED branches in both functions to prevent the fall-through.

In the Linux kernel, the following vulnerability has been resolved: nfc: llcp: add missing return after LLCP_CLOSED checks In nfc_llcp_recv_hdlc() and nfc_llcp_recv_disc(), when the socket state is LLCP_CLOSED, the code correctly calls release_sock() and nfc_llcp_sock_put() but fails to return. Execution falls through to the remainder of the function, which calls release_sock() and nfc_llcp_sock_put() again. This results in a double release_sock() and a refcount underflow via double nfc_llcp_sock_put(), leading to a use-after-free. Add the missing return statements after the LLCP_CLOSED branches in both functions to prevent the fall-through.

In multiple functions of llcp_core.c, there is a possible use after free due to a logic error in the code. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

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

nfc: llcp: add missing return after LLCP_CLOSED checks

In nfc_llcp_recv_hdlc() and nfc_llcp_recv_disc(), when the socket state is LLCP_CLOSED, the code correctly calls release_sock() and nfc_llcp_sock_put() but fails to return. Execution falls through to the remainder of the function, which calls release_sock() and nfc_llcp_sock_put() again. This results in a double release_sock() and a refcount underflow via double nfc_llcp_sock_put(), leading to a use-after-free.

Add the missing return statements after the LLCP_CLOSED branches in both functions to prevent the fall-through.

• CVE-2025-68724
  • crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id {CVE-2025-68724}
• CVE-2025-71196
  • phy: stm32-usphyc: Fix off by one in probe() {CVE-2025-71196}
• CVE-2026-23033
  • dmaengine: omap-dma: fix dma_pool resource leak in error paths {CVE-2026-23033}
• CVE-2026-23049
  • drm/panel-simple: fix connector type for DataImage SCF0700C48GGU18 panel {CVE-2026-23049}
• CVE-2026-23318
  • ALSA: usb-audio: Use correct version for UAC3 header validation {CVE-2026-23318}
• CVE-2026-23372
  • nfc: rawsock: cancel tx_work before socket teardown {CVE-2026-23372}
• CVE-2026-23397
  • nfnetlink_osf: validate individual option lengths in fingerprints {CVE-2026-23397}
• CVE-2026-23406
  • apparmor: fix side-effect bug in match_char() macro usage {CVE-2026-23406}
• CVE-2026-23407
  • apparmor: fix missing bounds check on DEFAULT table in verify_dfa() {CVE-2026-23407}
• CVE-2026-31494
  • net: macb: use the current queue number for stats {CVE-2026-31494}
• CVE-2026-31504
  • net: fix fanout UAF in packet_release() via NETDEV_UP race {CVE-2026-31504}
• CVE-2026-31576
  • media: hackrf: fix to not free memory after the device is registered in hackrf_probe() {CVE-2026-31576}
• CVE-2026-31583
  • media: em28xx: fix use-after-free in em28xx_v4l2_open() {CVE-2026-31583}
• CVE-2026-31622
  • NFC: digital: Bounds check NFC-A cascade depth in SDD response handler {CVE-2026-31622}
• CVE-2026-31629
  • nfc: llcp: add missing return after LLCP_CLOSED checks {CVE-2026-31629}
• CVE-2026-31659
  • batman-adv: reject oversized global TT response buffers {CVE-2026-31659}
• CVE-2026-31720
  • usb: gadget: f_uac1_legacy: validate control request size {CVE-2026-31720}
• CVE-2026-43236
  • drm/atmel-hlcdc: fix use-after-free of drm_crtc_commit after release {CVE-2026-43236}
• CVE-2026-43283
  • net: ethernet: ec_bhf: Fix dma_free_coherent() dma handle {CVE-2026-43283}
• CVE-2026-43373
  • net: ncsi: fix skb leak in error paths {CVE-2026-43373}
• CVE-2026-43206
  • drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set() {CVE-2026-43206}
• CVE-2026-31778
  • ALSA: caiaq: fix stack out-of-bounds read in init_card {CVE-2026-31778}
• CVE-2026-43040
  • net: ipv6: ndisc: fix ndisc_ra_useropt to initialize nduseropt_padX fields to zero to prevent an info-leak {CVE-2026-43040}
• CVE-2026-43141
  • ntb: ntb_hw_switchtec: Fix shift-out-of-bounds for 0 mw lut {CVE-2026-43141}
• CVE-2026-23388
  • Squashfs: check metadata block offset is within range {CVE-2026-23388}
• Miscellaneous upstream changes
  • UBUNTU: adjust changelog history to match cranky format
  • smb: client: reject userspace cifs.spnego descriptions
• Bump ABI 5.4.0-231

• CVE-2022-50093
  • iommu/vt-d: avoid invalid memory access via node_online(NUMA_NO_NODE) {CVE-2022-50093}
• CVE-2026-31778
  • ALSA: caiaq: fix stack out-of-bounds read in init_card {CVE-2026-31778}
• CVE-2026-43011
  • net/x25: Fix potential double free of skb {CVE-2026-43011}
• CVE-2026-31602
  • ALSA: ctxfi: Limit PTP to a single page {CVE-2026-31602}
• CVE-2026-31622
  • NFC: digital: Bounds check NFC-A cascade depth in SDD response handler {CVE-2026-31622}
• CVE-2026-31583
  • media: em28xx: fix use-after-free in em28xx_v4l2_open() {CVE-2026-31583}
• CVE-2026-31659
  • batman-adv: reject oversized global TT response buffers {CVE-2026-31659}
• CVE-2023-53596
  • drivers: base: Free devm resources when unregistering a {CVE-2023-53596}
• CVE-2026-31696
  • rxrpc: Fix missing validation of ticket length in non-XDR key preparsing {CVE-2026-31696}
• CVE-2022-50497
  • binfmt_misc: fix shift-out-of-bounds in check_special_flags {CVE-2022-50497}
• CVE-2026-23372
  • nfc: rawsock: cancel tx_work before socket teardown {CVE-2026-23372}
• CVE-2026-23193
  • scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count() {CVE-2026-23193}
• CVE-2023-53619
  • netfilter: conntrack: Avoid nf_ct_helper_hash uses after free {CVE-2023-53619}
• CVE-2023-53285
  • ext4: add bounds checking in get_max_inline_xattr_value_size() {CVE-2023-53285}
• CVE-2026-43427
  • usb: class: cdc-wdm: fix reordering issue in read code path {CVE-2026-43427}
• CVE-2026-43052
  • wifi: mac80211: check tdls flag in ieee80211_tdls_oper {CVE-2026-43052}
• CVE-2026-31405
  • media: dvb-net: fix OOB access in ULE extension header tables {CVE-2026-31405}
• CVE-2026-31629
  • nfc: llcp: add missing return after LLCP_CLOSED checks {CVE-2026-31629}
• CVE-2025-71136
  • media: adv7842: Avoid possible out-of-bounds array accesses in adv7842_cp_log_status() {CVE-2025-71136}
• CVE-2026-31417
  • net/x25: Fix overflow when accumulating packets {CVE-2026-31417}
• CVE-2026-43020
  • Bluetooth: MGMT: validate LTK enc_size on load {CVE-2026-43020}
• CVE-2026-43040
  • net: ipv6: ndisc: fix ndisc_ra_useropt to initialize nduseropt_padX fields to zero to prevent an info-leak {CVE-2026-43040}
• CVE-2022-49770
  • ceph: avoid putting the realm twice when decoding snaps fails {CVE-2022-49770}
• CVE-2026-43283
  • net: ethernet: ec_bhf: Fix dma_free_coherent() dma handle {CVE-2026-43283}
• CVE-2026-31748
  • comedi: me_daq: Fix potential overrun of firmware buffer {CVE-2026-31748}
• CVE-2026-31747
  • comedi: me4000: Fix potential overrun of firmware buffer {CVE-2026-31747}
• CVE-2026-31576
  • media: hackrf: fix to not free memory after the device is registered in hackrf_probe() {CVE-2026-31576}
• CVE-2026-31399
  • nvdimm/bus: Fix potential use after free in asynchronous initialization {CVE-2026-31399}
• CVE-2026-23388
  • Squashfs: check metadata block offset is within range {CVE-2026-23388}
• CVE-2026-43450
  • netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table() {CVE-2026-43450}
• CVE-2026-31720
  • usb: gadget: f_uac1_legacy: validate control request size {CVE-2026-31720}
• CVE-2026-23216
  • scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count() {CVE-2026-23216}
• Bump ABI 4.4.0-283

• CVE-2022-49267
  • mmc: core: use sysfs_emit() instead of sprintf() {CVE-2022-49267}
  • mmc: sdio: Export SDIO revision and info strings to userspace {CVE-2022-49267}
• CVE-2026-43040
  • net: ipv6: ndisc: fix ndisc_ra_useropt to initialize nduseropt_padX fields to zero to prevent an info-leak {CVE-2026-43040}
• CVE-2026-43027
  • netfilter: nf_conntrack_helper: pass helper to expect cleanup {CVE-2026-43027}
• CVE-2025-71091
  • team: fix check for port enabled in team_queue_override_port_prio_changed() {CVE-2025-71091}
• CVE-2025-71075
  • scsi: aic94xx: fix use-after-free in device removal path {CVE-2025-71075}
• CVE-2025-38565
  • perf/core: Exit early on perf_mmap() fail {CVE-2025-38565}
• CVE-2025-38401
  • mtk-sd: Prevent memory corruption from DMA map failure {CVE-2025-38401}
• CVE-2023-53218
  • rxrpc: Make it so that a waiting process can be aborted {CVE-2023-53218}
• CVE-2025-38230
  • jfs: validate AG parameters in dbMount() to prevent crashes {CVE-2025-38230}
• CVE-2023-52867
  • drm/radeon: possible buffer overflow {CVE-2023-52867}
• CVE-2023-53432
  • firewire: net: fix use after free in fwnet_finish_incoming_packet() {CVE-2023-53432}
• CVE-2025-39891
  • wifi: mwifiex: Initialize the chan_stats array to zero {CVE-2025-39891}
• CVE-2025-38666
  • net: appletalk: Fix use-after-free in AARP proxy probe {CVE-2025-38666}
• CVE-2025-39828
  • atm: atmtcp: Prevent arbitrary write in atmtcp_recv_control() {CVE-2025-39828}
• CVE-2026-43020
  • Bluetooth: MGMT: validate LTK enc_size on load {CVE-2026-43020}
• CVE-2026-43011
  • net/x25: Fix potential double free of skb {CVE-2026-43011}
• CVE-2026-31778
  • ALSA: caiaq: fix stack out-of-bounds read in init_card {CVE-2026-31778}
• CVE-2026-31748
  • comedi: me_daq: Fix potential overrun of firmware buffer {CVE-2026-31748}
• CVE-2026-31747
  • comedi: me4000: Fix potential overrun of firmware buffer {CVE-2026-31747}
• CVE-2026-31720
  • usb: gadget: f_uac1_legacy: validate control request size {CVE-2026-31720}
• CVE-2026-31696
  • rxrpc: Fix missing validation of ticket length in non-XDR key preparsing {CVE-2026-31696}
• CVE-2026-31659
  • batman-adv: reject oversized global TT response buffers {CVE-2026-31659}
• CVE-2026-31629
  • nfc: llcp: add missing return after LLCP_CLOSED checks {CVE-2026-31629}
• CVE-2026-31626
  • staging: rtl8723bs: initialize le_tmp64 in rtw_BIP_verify() {CVE-2026-31626}
• CVE-2026-31622
  • NFC: digital: Bounds check NFC-A cascade depth in SDD response handler {CVE-2026-31622}
• CVE-2026-31602
  • ALSA: ctxfi: Limit PTP to a single page {CVE-2026-31602}
• CVE-2026-31583
  • media: em28xx: fix use-after-free in em28xx_v4l2_open() {CVE-2026-31583}
• CVE-2026-31581
  • ALSA: 6fire: fix use-after-free on disconnect {CVE-2026-31581}
• CVE-2026-31576
  • media: hackrf: fix to not free memory after the device is registered in hackrf_probe() {CVE-2026-31576}
• CVE-2026-31504
  • net: fix fanout UAF in packet_release() via NETDEV_UP race {CVE-2026-31504}
• CVE-2026-23388
  • Squashfs: check metadata block offset is within range {CVE-2026-23388}
• CVE-2026-23372
  • nfc: rawsock: cancel tx_work before socket teardown {CVE-2026-23372}
• Bump ABI 4.15.0-259