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CVE-2025-71143— clk: samsung: exynos-clkout: Assign .num before accessing .hws

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，该漏洞源于在访问数组前未正确初始化元素数量，可能导致数组索引越界。

AI Predicted 5.5 Difficulty: Easy EPSS 0.14% · P3

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux f316cdff8d677db9ad9c90acb44c4cd535b0ee27< fbf57f5e453dadadb3d29b2d1dbe067e3dc4e236 affected
f316cdff8d677db9ad9c90acb44c4cd535b0ee27< eb1f3a6ab3efee2b52361879cdc2dc6b11f499c0 affected
f316cdff8d677db9ad9c90acb44c4cd535b0ee27< a317f63255ebc3dac378c79c5bff4f8d0561c290 affected
f316cdff8d677db9ad9c90acb44c4cd535b0ee27< cf33f0b7df13685234ccea7be7bfe316b60db4db affected
6.6 affected
< 6.6 unaffected
6.6.120≤ 6.6.* unaffected
6.12.64≤ 6.12.* unaffected
… +2 more rows
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I. Basic Information for CVE-2025-71143

Vulnerability Information
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Vulnerability Title
clk: samsung: exynos-clkout: Assign .num before accessing .hws
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: clk: samsung: exynos-clkout: Assign .num before accessing .hws Commit f316cdff8d67 ("clk: Annotate struct clk_hw_onecell_data with __counted_by") annotated the hws member of 'struct clk_hw_onecell_data' with __counted_by, which informs the bounds sanitizer (UBSAN_BOUNDS) about the number of elements in .hws[], so that it can warn when .hws[] is accessed out of bounds. As noted in that change, the __counted_by member must be initialized with the number of elements before the first array access happens, otherwise there will be a warning from each access prior to the initialization because the number of elements is zero. This occurs in exynos_clkout_probe() due to .num being assigned after .hws[] has been accessed: UBSAN: array-index-out-of-bounds in drivers/clk/samsung/clk-exynos-clkout.c:178:18 index 0 is out of range for type 'clk_hw *[*]' Move the .num initialization to before the first access of .hws[], clearing up the warning.
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，该漏洞源于在访问数组前未正确初始化元素数量，可能导致数组索引越界。
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 f316cdff8d677db9ad9c90acb44c4cd535b0ee27 ~ fbf57f5e453dadadb3d29b2d1dbe067e3dc4e236 -
Linux Linux 6.6 -

II. Public POCs for CVE-2025-71143

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III. Intelligence Information for CVE-2025-71143

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Same Patch Batch · Linux · 2026-01-14 · 43 CVEs total

CVE-2025-71116 9.1 CRITICAL libceph: make decode_pool() more resilient against corrupted osdmaps
CVE-2025-71112 8.8 HIGH net: hns3: add VLAN id validation before using
CVE-2025-71130 7.8 HIGH drm/i915/gem: Zero-initialize the eb.vma array in i915_gem_do_execbuffer
CVE-2025-71126 7.5 HIGH mptcp: avoid deadlock on fallback while reinjecting
CVE-2025-71128 7.5 HIGH erspan: Initialize options_len before referencing options.
CVE-2025-71131 7.5 HIGH crypto: seqiv - Do not use req->iv after crypto_aead_encrypt
CVE-2025-71132 7.5 HIGH smc91x: fix broken irq-context in PREEMPT_RT
CVE-2025-71120 7.5 HIGH SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf
CVE-2025-71109 7.1 HIGH MIPS: ftrace: Fix memory corruption when kernel is located beyond 32 bits
CVE-2025-71136 7.1 HIGH media: adv7842: Avoid possible out-of-bounds array accesses in adv7842_cp_log_status()
CVE-2025-71127 7.1 HIGH wifi: mac80211: Discard Beacon frames to non-broadcast address
CVE-2025-71107 f2fs: ensure node page reads complete before f2fs_put_super() finishes
CVE-2025-71110 mm/slub: reset KASAN tag in defer_free() before accessing freed memory
CVE-2025-71103 drm/msm: adreno: fix deferencing ifpc_reglist when not declared
CVE-2025-71113 crypto: af_alg - zero initialize memory allocated via sock_kmalloc
CVE-2025-71114 via_wdt: fix critical boot hang due to unnamed resource allocation
CVE-2025-71115 um: init cpu_tasks[] earlier
CVE-2025-71102 scs: fix a wrong parameter in __scs_magic
CVE-2025-71117 block: Remove queue freezing from several sysfs store callbacks
CVE-2025-71122 iommufd/selftest: Check for overflow in IOMMU_TEST_OP_ADD_RESERVED

Showing top 20 of 43 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-71143

Anonymous User
2026-01-15 06:08:11

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