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CVE-2025-39849— wifi: cfg80211: sme: cap SSID length in __cfg80211_connect_result()

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，该漏洞源于未限制SSID长度，可能导致内存损坏。

CVSS 8.8 · High EPSS 0.22% · P12

Affected Version Matrix 15

VendorProduct Version RangeStatus
Linux Linux dd43f8f90206054e7da7593de0a334fb2cd0ea88< 8e751d46336205abc259ed3990e850a9843fb649 affected
c38c701851011c94ce3be1ccb3593678d2933fd8< e472f59d02c82b511bc43a3f96d62ed08bf4537f affected
c38c701851011c94ce3be1ccb3593678d2933fd8< 31229145e6ba5ace3e9391113376fa05b7831ede affected
c38c701851011c94ce3be1ccb3593678d2933fd8< 5cb7cab7adf9b1e6a99e2081b0e30e9e59d07523 affected
c38c701851011c94ce3be1ccb3593678d2933fd8< 62b635dcd69c4fde7ce1de4992d71420a37e51e3 affected
bf3c348c5fdcf00a7eeed04a1b83e454d2dca2e5 affected
6.1.16< 6.1.151 affected
6.2.3< 6.3 affected
… +7 more rows
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I. Basic Information for CVE-2025-39849

Vulnerability Information
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Vulnerability Title
wifi: cfg80211: sme: cap SSID length in __cfg80211_connect_result()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: sme: cap SSID length in __cfg80211_connect_result() If the ssid->datalen is more than IEEE80211_MAX_SSID_LEN (32) it would lead to memory corruption so add some bounds checking.
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，该漏洞源于未限制SSID长度，可能导致内存损坏。
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 dd43f8f90206054e7da7593de0a334fb2cd0ea88 ~ 8e751d46336205abc259ed3990e850a9843fb649 -
Linux Linux 6.3 -

II. Public POCs for CVE-2025-39849

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III. Intelligence Information for CVE-2025-39849

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Same Patch Batch · Linux · 2025-09-19 · 30 CVEs total

CVE-2025-39841 9.8 CRITICAL scsi: lpfc: Fix buffer free/clear order in deferred receive path
CVE-2025-39864 8.8 HIGH wifi: cfg80211: fix use-after-free in cmp_bss()
CVE-2025-39862 8.8 HIGH wifi: mt76: mt7915: fix list corruption after hardware restart
CVE-2025-39839 8.8 HIGH batman-adv: fix OOB read/write in network-coding decode
CVE-2025-39848 8.8 HIGH ax25: properly unshare skbs in ax25_kiss_rcv()
CVE-2025-39860 8.0 HIGH Bluetooth: Fix use-after-free in l2cap_sock_cleanup_listen()
CVE-2025-39837 7.8 HIGH platform/x86: asus-wmi: Fix racy registrations
CVE-2025-39863 7.8 HIGH wifi: brcmfmac: fix use-after-free when rescheduling brcmf_btcoex_info work
CVE-2025-39866 7.8 HIGH fs: writeback: fix use-after-free in __mark_inode_dirty()
CVE-2025-39854 7.8 HIGH ice: fix NULL access of tx->in_use in ice_ll_ts_intr
CVE-2025-39851 7.5 HIGH vxlan: Fix NPD when refreshing an FDB entry with a nexthop object
CVE-2025-39857 7.5 HIGH net/smc: fix one NULL pointer dereference in smc_ib_is_sg_need_sync()
CVE-2025-39840 7.1 HIGH audit: fix out-of-bounds read in audit_compare_dname_path()
CVE-2025-39845 x86/mm/64: define ARCH_PAGE_TABLE_SYNC_MASK and arch_sync_kernel_mappings()
CVE-2025-39865 tee: fix NULL pointer dereference in tee_shm_put
CVE-2025-39838 cifs: prevent NULL pointer dereference in UTF16 conversion
CVE-2025-39861 Bluetooth: vhci: Prevent use-after-free by removing debugfs files early
CVE-2025-39859 ptp: ocp: fix use-after-free bugs causing by ptp_ocp_watchdog
CVE-2025-39842 ocfs2: prevent release journal inode after journal shutdown
CVE-2025-39844 mm: move page table sync declarations to linux/pgtable.h

Showing top 20 of 30 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-39849

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