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CVE-2025-38657— wifi: rtw89: mcc: prevent shift wrapping in rtw89_core_mlsr_switch()

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rtw89 mcc在mlsr_switch中可能发生移位溢出，导致越界访问。

CVSS 7.3 · High EPSS 0.15% · P4

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux 9dd85e739ce0765f022014c3e0713e1007d7ef60< 417cfa9cc44fbe6bceab786f9a4ee5a210f1288e affected
9dd85e739ce0765f022014c3e0713e1007d7ef60< 53cf488927a0f79968f9c03c4d1e00d2a79731c3 affected
6.16 affected
< 6.16 unaffected
6.16.1≤ 6.16.* unaffected
6.17≤ * unaffected
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I. Basic Information for CVE-2025-38657

Vulnerability Information
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Vulnerability Title
wifi: rtw89: mcc: prevent shift wrapping in rtw89_core_mlsr_switch()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: rtw89: mcc: prevent shift wrapping in rtw89_core_mlsr_switch() The "link_id" value comes from the user via debugfs. If it's larger than BITS_PER_LONG then that would result in shift wrapping and potentially an out of bounds access later. In fact, we can limit it to IEEE80211_MLD_MAX_NUM_LINKS (15). Fortunately, only root can write to debugfs files so the security impact is minimal.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/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rtw89 mcc在mlsr_switch中可能发生移位溢出，导致越界访问。
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 9dd85e739ce0765f022014c3e0713e1007d7ef60 ~ 417cfa9cc44fbe6bceab786f9a4ee5a210f1288e -
Linux Linux 6.16 -

II. Public POCs for CVE-2025-38657

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III. Intelligence Information for CVE-2025-38657

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Patches & Fixes for CVE-2025-38657 (1)

Same Patch Batch · Linux · 2025-08-22 · 60 CVEs total

CVE-2025-38660 9.8 CRITICAL [ceph] parse_longname(): strrchr() expects NUL-terminated string
CVE-2025-38658 8.8 HIGH nvmet: pci-epf: Do not complete commands twice if nvmet_req_init() fails
CVE-2025-38643 8.8 HIGH wifi: cfg80211: Add missing lock in cfg80211_check_and_end_cac()
CVE-2024-58239 8.2 HIGH tls: stop recv() if initial process_rx_list gave us non-DATA
CVE-2025-38675 7.8 HIGH xfrm: state: initialize state_ptrs earlier in xfrm_state_find
CVE-2025-38627 7.8 HIGH f2fs: compress: fix UAF of f2fs_inode_info in f2fs_free_dic
CVE-2025-38653 7.8 HIGH proc: use the same treatment to check proc_lseek as ones for proc_read_iter et.al
CVE-2025-38659 7.8 HIGH gfs2: No more self recovery
CVE-2025-38640 7.8 HIGH bpf: Disable migration in nf_hook_run_bpf().
CVE-2025-38656 7.8 HIGH wifi: iwlwifi: Fix error code in iwl_op_mode_dvm_start()
CVE-2025-38670 7.8 HIGH arm64/entry: Mask DAIF in cpu_switch_to(), call_on_irq_stack()
CVE-2025-38617 7.8 HIGH net/packet: fix a race in packet_set_ring() and packet_notifier()
CVE-2025-38618 7.8 HIGH vsock: Do not allow binding to VMADDR_PORT_ANY
CVE-2025-38619 7.8 HIGH media: ti: j721e-csi2rx: fix list_del corruption
CVE-2025-38616 7.8 HIGH tls: handle data disappearing from under the TLS ULP
CVE-2025-38667 7.8 HIGH iio: fix potential out-of-bound write
CVE-2025-38652 7.3 HIGH f2fs: fix to avoid out-of-boundary access in devs.path
CVE-2025-38662 7.1 HIGH ASoC: mediatek: mt8365-dai-i2s: pass correct size to mt8365_dai_set_priv
CVE-2025-38639 7.1 HIGH netfilter: xt_nfacct: don't assume acct name is null-terminated
CVE-2025-38661 7.1 HIGH platform/x86: alienware-wmi-wmax: Fix `dmi_system_id` array

Showing top 20 of 60 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38657

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