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CVE-2026-63931— iio: chemical: scd30: fix division by zero in write_raw

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基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于在设置采样频率时未对val2参数进行零值检查，导致用户向sampling_frequency sysfs属性写入零小数部分时触发除零错误，从而引发内核崩溃。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 64b3d8b1b0f5c16c19045785e4da8391ae35ec99< 4748bce423a363bb8a85a624faeb8f54fe331611 affected
64b3d8b1b0f5c16c19045785e4da8391ae35ec99< 6308b812acdcac38cbfe1af0b1524c3375f408a5 affected
64b3d8b1b0f5c16c19045785e4da8391ae35ec99< c7a740bf75554b051fabb17596ca6e483d6e6d90 affected
64b3d8b1b0f5c16c19045785e4da8391ae35ec99< e85bc501947f5ae16dd9adc01162b76d55ab7962 affected
64b3d8b1b0f5c16c19045785e4da8391ae35ec99< d98c2e69aab905d1b19a69ffe584efa46a9efd42 affected
64b3d8b1b0f5c16c19045785e4da8391ae35ec99< 5e4d34092a5ebfbc3a45a180c76ecb1cdbbedd53 affected
64b3d8b1b0f5c16c19045785e4da8391ae35ec99< 2c50c017df97bfb425038efdfb8514c7bcd08564 affected
64b3d8b1b0f5c16c19045785e4da8391ae35ec99< 5aba4f94b225617a55fed442a70329b2ee19c0a5 affected
… +10 more rows
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I. Basic Information for CVE-2026-63931

Vulnerability Information
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Vulnerability Title
iio: chemical: scd30: fix division by zero in write_raw
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: iio: chemical: scd30: fix division by zero in write_raw Add a zero check for val2 before using it as a divisor when setting the sampling frequency. A user writing a zero fractional part to the sampling_frequency sysfs attribute triggers a division by zero in the kernel.
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基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于在设置采样频率时未对val2参数进行零值检查，导致用户向sampling_frequency sysfs属性写入零小数部分时触发除零错误，从而引发内核崩溃。
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 64b3d8b1b0f5c16c19045785e4da8391ae35ec99 ~ 4748bce423a363bb8a85a624faeb8f54fe331611 -
Linux Linux 5.9 -

II. Public POCs for CVE-2026-63931

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III. Intelligence Information for CVE-2026-63931

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Patches & Fixes for CVE-2026-63931 (8)

Same Patch Batch · Linux · 2026-07-19 · 429 CVEs total

CVE-2026-63795 10.0 CRITICAL 9p: avoid putting oldfid in p9_client_walk() error path
CVE-2026-64037 9.8 CRITICAL wifi: iwlwifi: mld: fix TSO segmentation explosion when AMSDU is disabled
CVE-2026-63993 9.8 CRITICAL vxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu()
CVE-2026-63994 9.8 CRITICAL tunnels: load network headers after skb_cow() in iptunnel_pmtud_build_icmp[v6]()
CVE-2026-64142 9.8 CRITICAL ksmbd: close durable scavenger races against m_fp_list lookups
CVE-2026-64000 9.8 CRITICAL net: hsr: fix potential OOB access in supervision frame handling
CVE-2026-64046 9.8 CRITICAL net: tls: prevent chain-after-chain in plain text SG
CVE-2026-64162 9.8 CRITICAL idpf: fix read_dev_clk_lock spinlock init in idpf_ptp_init()
CVE-2026-53399 9.8 CRITICAL nfsd: release layout stid on setlease failure
CVE-2026-53398 9.8 CRITICAL NFSD: Fix SECINFO_NO_NAME decode error cleanup
CVE-2026-64007 9.8 CRITICAL netfilter: synproxy: refresh tcphdr after skb_ensure_writable
CVE-2026-63825 9.8 CRITICAL gcov: use atomic counter updates to fix concurrent access crashes
CVE-2026-64016 9.8 CRITICAL ksmbd: fix durable reconnect error path file lifetime
CVE-2026-63800 9.8 CRITICAL pNFS: Fix use-after-free in pnfs_update_layout()
CVE-2026-63808 9.8 CRITICAL exfat: fix potential use-after-free in exfat_find_dir_entry()
CVE-2026-64025 9.8 CRITICAL bpf, skmsg: fix verdict sk_data_ready racing with ktls rx
CVE-2026-64125 9.8 CRITICAL net: bcmgenet: keep RBUF EEE/PM disabled
CVE-2026-64033 9.8 CRITICAL RDMA/rtrs: Fix use-after-free in path file creation cleanup
CVE-2026-64089 9.8 CRITICAL batman-adv: tt: fix negative last_changeset_len
CVE-2026-64035 9.8 CRITICAL igc: set tx buffer type for SMD frames

Showing top 20 of 429 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-63931

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