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CVE-2026-46267— nfc: hci: shdlc: Stop timers and work before freeing context

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于NFC HCI SHDLC定时器和工作在释放上下文前未停止，可能导致释放后重用。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 4a61cd6687fc6348d08724676d34e38160d6cf9b< c60f41022eaad2a1dafecd3ae6f249a3bd6d4b6e affected
4a61cd6687fc6348d08724676d34e38160d6cf9b< a24a676329d40481b2331bfa1418a679577dfd3a affected
4a61cd6687fc6348d08724676d34e38160d6cf9b< 77eef9f2eef045c3c37a3df82d3e661afb866b98 affected
4a61cd6687fc6348d08724676d34e38160d6cf9b< cf70cedce327833296ebe6043364d1e44b76a2ab affected
4a61cd6687fc6348d08724676d34e38160d6cf9b< 276820278e9717cc7d4bb32381892dd3ddf418d4 affected
4a61cd6687fc6348d08724676d34e38160d6cf9b< 1cb97b1225450af3f7b728777929ba50c6a58ced affected
4a61cd6687fc6348d08724676d34e38160d6cf9b< c9efde1e537baed7648a94022b43836a348a074f affected
3.7 affected
… +8 more rows
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I. Basic Information for CVE-2026-46267

Vulnerability Information
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Vulnerability Title
nfc: hci: shdlc: Stop timers and work before freeing context
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: nfc: hci: shdlc: Stop timers and work before freeing context llc_shdlc_deinit() purges SHDLC skb queues and frees the llc_shdlc structure while its timers and state machine work may still be active. Timer callbacks can schedule sm_work, and sm_work accesses SHDLC state and the skb queues. If teardown happens in parallel with a queued/running work item, it can lead to UAF and other shutdown races. Stop all SHDLC timers and cancel sm_work synchronously before purging the queues and freeing the context. Found by Linux Verification Center (linuxtesting.org) with SVACE.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于NFC HCI SHDLC定时器和工作在释放上下文前未停止，可能导致释放后重用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 4a61cd6687fc6348d08724676d34e38160d6cf9b ~ c60f41022eaad2a1dafecd3ae6f249a3bd6d4b6e -
Linux Linux 3.7 -

II. Public POCs for CVE-2026-46267

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III. Intelligence Information for CVE-2026-46267

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Patches & Fixes for CVE-2026-46267 (7)

Same Patch Batch · Linux · 2026-06-03 · 32 CVEs total

CVE-2026-46244 9.1 CRITICAL netfilter: nft_inner: Fix IPv6 inner_thoff desync
CVE-2026-46266 9.1 CRITICAL inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP
CVE-2026-46264 8.8 HIGH drm/xe/pf: Fix sysfs initialization
CVE-2026-46273 8.6 HIGH ibmveth: Disable GSO for packets with small MSS
CVE-2026-46251 8.4 HIGH btrfs: fix block_group_tree dirty_list corruption
CVE-2026-46270 8.4 HIGH power: supply: rt9455: Fix use-after-free in power_supply_changed()
CVE-2026-46263 7.8 HIGH drm/amd/display: Fix out-of-bounds stream encoder index v3
CVE-2026-46260 7.8 HIGH ipv6: Fix out-of-bound access in fib6_add_rt2node().
CVE-2026-46259 7.8 HIGH procfs: fix missing RCU protection when reading real_parent in do_task_stat()
CVE-2026-46271 7.8 HIGH wifi: ath12k: do WoW offloads only on primary link
CVE-2026-46253 7.8 HIGH pstore/ram: fix buffer overflow in persistent_ram_save_old()
CVE-2026-46265 7.5 HIGH RDMA/hns: Fix WQ_MEM_RECLAIM warning
CVE-2026-46250 7.3 HIGH MIPS: Work around LLVM bug when gp is used as global register variable
CVE-2025-71314 drm/panthor: Recover from panthor_gpu_flush_caches() failures
CVE-2025-71313 PCI: endpoint: Add missing NULL check for alloc_workqueue()
CVE-2026-46245 drm/amd/display: Fix dc_link NULL handling in HPD init
CVE-2026-46246 power: supply: pm8916_lbc: Fix use-after-free for extcon in IRQ handler
CVE-2026-46247 clk: qcom: gfx3d: add parent to parent request map
CVE-2026-46248 wifi: ath12k: clear stale link mapping of ahvif->links_map
CVE-2026-46249 octeontx2-af: Fix PF driver crash with kexec kernel booting

Showing top 20 of 32 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46267

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