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CVE-2026-23246— wifi: mac80211: bounds-check link_id in ieee80211_ml_reconfiguration

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ieee80211_ml_reconfiguration函数中未对link_id进行边界检查，可能导致栈越界写入。

CVSS 8.8 · High EPSS 0.30% · P22

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c< 650981e718e68005ca2760a6358134b8a98ebea4 affected
8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c< bfde158d5d1322c0c2df398a8d1ccce04943be2e affected
8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c< f35ceec54d48e227fa46f8f97fd100a77b8eab15 affected
8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c< d58d71c2167601762351962b9604808d3be94400 affected
8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c< 162d331d833dc73a3e905a24c44dd33732af1fc5 affected
6.5 affected
< 6.5 unaffected
6.6.130≤ 6.6.* unaffected
… +4 more rows
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I. Basic Information for CVE-2026-23246

Vulnerability Information
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Vulnerability Title
wifi: mac80211: bounds-check link_id in ieee80211_ml_reconfiguration
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: bounds-check link_id in ieee80211_ml_reconfiguration link_id is taken from the ML Reconfiguration element (control & 0x000f), so it can be 0..15. link_removal_timeout[] has IEEE80211_MLD_MAX_NUM_LINKS (15) elements, so index 15 is out-of-bounds. Skip subelements with link_id >= IEEE80211_MLD_MAX_NUM_LINKS to avoid a stack out-of-bounds write.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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ieee80211_ml_reconfiguration函数中未对link_id进行边界检查，可能导致栈越界写入。
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 8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c ~ 650981e718e68005ca2760a6358134b8a98ebea4 -
Linux Linux 6.5 -

II. Public POCs for CVE-2026-23246

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III. Intelligence Information for CVE-2026-23246

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Patches & Fixes for CVE-2026-23246 (5)

Same Patch Batch · Linux · 2026-03-18 · 35 CVEs total

CVE-2026-23268 7.8 HIGH apparmor: fix unprivileged local user can do privileged policy management
CVE-2026-23270 7.8 HIGH net/sched: Only allow act_ct to bind to clsact/ingress qdiscs and shared blocks
CVE-2026-23253 7.8 HIGH media: dvb-core: fix wrong reinitialization of ringbuffer on reopen
CVE-2026-23243 7.8 HIGH RDMA/umad: Reject negative data_len in ib_umad_write
CVE-2026-23245 7.8 HIGH net/sched: act_gate: snapshot parameters with RCU on replace
CVE-2026-23248 7.8 HIGH perf/core: Fix refcount bug and potential UAF in perf_mmap
CVE-2025-71269 7.5 HIGH btrfs: do not free data reservation in fallback from inline due to -ENOSPC
CVE-2025-71268 7.5 HIGH btrfs: fix reservation leak in some error paths when inserting inline extent
CVE-2026-23242 7.5 HIGH RDMA/siw: Fix potential NULL pointer dereference in header processing
CVE-2026-23269 7.1 HIGH apparmor: validate DFA start states are in bounds in unpack_pdb
CVE-2026-23247 tcp: secure_seq: add back ports to TS offset
CVE-2026-23244 nvme: fix memory allocation in nvme_pr_read_keys()
CVE-2026-23249 xfs: check for deleted cursors when revalidating two btrees
CVE-2026-23250 xfs: check return value of xchk_scrub_create_subord
CVE-2026-23251 xfs: only call xf{array,blob}_destroy if we have a valid pointer
CVE-2026-23252 xfs: get rid of the xchk_xfile_*_descr calls
CVE-2025-71267 fs: ntfs3: fix infinite loop triggered by zero-sized ATTR_LIST
CVE-2025-71266 fs: ntfs3: check return value of indx_find to avoid infinite loop
CVE-2025-71265 fs: ntfs3: fix infinite loop in attr_load_runs_range on inconsistent metadata
CVE-2025-71270 LoongArch: Enable exception fixup for specific ADE subcode

Showing top 20 of 35 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-23246

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