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CVE-2026-93784— wifi: cfg80211: validate IEs in cfg80211_wext_siwgenie()

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.

在 Linux 内核中，已修复以下漏洞： wifi: cfg80211: 在 cfg80211_wext_siwgenie() 中验证 IE（信息元素） KASAN 分配跟踪显示，通过 SIOCSIWGENIE（即 cfg80211_wext_siwgenie()）存储了一个格式错误的 IE 缓冲区，且未进行任何有效性验证。崩溃跟踪表明，随后的 SIOCSIWESSID 触发了连接尝试，该尝试调用 cfg8011_sme_get_conn_ies() 来处理之前存储的 IE 缓冲区，从而导致以下问题： 在 skip

AI Predicted 7.8 Difficulty: Moderate EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux f21293549f60f88c74fcb9944737f11048896dc4< 269498ce6c1e2132b072aa0c8660404926008f03 affected
f21293549f60f88c74fcb9944737f11048896dc4< 685082f4be77f4657b498ebbe9f942ef65c492cf affected
f21293549f60f88c74fcb9944737f11048896dc4< 8b921a8993469a3482e0c67b5ce5cb6ce93f5f61 affected
f21293549f60f88c74fcb9944737f11048896dc4< d01f1600e8b075aa17adb751ac9881bb6ee40dcc affected
f21293549f60f88c74fcb9944737f11048896dc4< c970879e03b23a27df42caf7ba506485a165fb96 affected
f21293549f60f88c74fcb9944737f11048896dc4< 01cc395cecfaa73134d39fb9a401d9605d8bb2c5 affected
f21293549f60f88c74fcb9944737f11048896dc4< a2f5286ca4f304d3fd469f01b96b518608912a5c affected
2.6.32 affected
… +8 more rows
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I. Basic Information for CVE-2026-93784

Vulnerability Information
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Vulnerability Title
wifi: cfg80211: validate IEs in cfg80211_wext_siwgenie()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: validate IEs in cfg80211_wext_siwgenie() The KASAN allocation trace shows that a malformed IE buffer is stored via SIOCSIWGENIE (cfg80211_wext_siwgenie()) without any validation. The crash trace shows that a subsequent SIOCSIWESSID triggers a connection attempt which calls cfg80211_sme_get_conn_ies() to process the stored IE buffer, causing: - An out-of-bounds read in skip_ie() which reads ies[pos+1] (the length byte) past the end of the 1-byte buffer. - An integer underflow in the memcpy size argument when offs returned by ieee80211_ie_split() exceeds ies_len, causing unsigned subtraction to wrap to SIZE_MAX and triggering a fortify panic. Fix this by validating the IE buffer in cfg80211_wext_siwgenie() before storing it. [drop unnecessary ie_len check, update commit message]
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux f21293549f60f88c74fcb9944737f11048896dc4 ~ 269498ce6c1e2132b072aa0c8660404926008f03 -
Linux Linux 2.6.32 -

II. Public POCs for CVE-2026-93784

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III. Intelligence Information for CVE-2026-93784

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Patches & Fixes for CVE-2026-93784 (7)

Same Patch Batch · Linux · 2026-09-24 · 234 CVEs total

CVE-2026-93207 9.8 CRITICAL SUNRPC: Zero rpc_gss_wire_cred at svcauth_gss_decode_credbody() entry
CVE-2026-97413 9.8 CRITICAL RDMA/rtrs-srv: Fix integer underflow in process_read and process_write
CVE-2026-93228 9.1 CRITICAL svcrdma: Reject Write/Reply chunks with segcount 0
CVE-2026-93793 8.8 HIGH wifi: iwlwifi: mvm: validate TX_CMD response layout
CVE-2026-93799 8.8 HIGH wifi: iwlwifi: mvm: validate sta_id in BA window status notif
CVE-2026-93790 8.8 HIGH wifi: iwlwifi: mvm: fix out-of-bounds tid_data access in BA notif
CVE-2026-93806 8.8 HIGH wifi: cfg80211: validate assoc response length before status and IE access
CVE-2026-97442 8.8 HIGH wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi
CVE-2026-97509 8.8 HIGH thunderbolt: Keep XDomain reference during the lifetime of a service
CVE-2026-97409 8.8 HIGH nvme-fc: Do not cancel requests in io target before it is initialized
CVE-2026-93280 8.8 HIGH greybus: audio: bound the topology section sizes against the fetched size
CVE-2026-93284 8.8 HIGH drm/pagemap: dma-unmap pages before handling migration errors
CVE-2026-97451 8.4 HIGH ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)
CVE-2026-97452 8.4 HIGH ACPICA: Prevent adding invalid references
CVE-2026-97455 8.4 HIGH ACPICA: Fix use-after-free in acpi_ds_terminate_control_method()
CVE-2026-97450 8.4 HIGH ACPICA: validate handler object type in two places
CVE-2026-93827 8.4 HIGH virtio-fs: avoid double-free on failed queue setup
CVE-2026-97433 8.2 HIGH nvme: validate FDP configuration descriptor sizes
CVE-2026-93786 8.1 HIGH ksmbd: preserve VFS inherited POSIX ACL mask
CVE-2026-93787 8.1 HIGH smb: client: bound dirent name against end of SMB response in cifs_filldir

Showing top 20 of 234 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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