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CVE-2026-64503— iio: accel: kxsd9: fix runtime PM imbalance on write_raw() error

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 4.9版本存在安全漏洞，该漏洞源于write_raw()函数在请求非零整数部分的scale时直接返回错误，未释放运行时PM引用，导致引用泄漏，可能造成设备无法自动挂起，容易受到拒绝服务攻击。

AI Predicted 5.3 Difficulty: Trivial EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 9a9a369d6178dd4e263c49085ce1b37e1e8f63a0< a93fd69c1ab0854ac4f5b8439c26dfadb25dfd20 affected
9a9a369d6178dd4e263c49085ce1b37e1e8f63a0< eeece4a85ece6f3837c75ef26a9b2bf5a1d0fcfc affected
9a9a369d6178dd4e263c49085ce1b37e1e8f63a0< 191fcfeb729ededd8dd2a999c6bf351ddfa0cec7 affected
9a9a369d6178dd4e263c49085ce1b37e1e8f63a0< 36154171385a8a2444a4b3c6eaa0c5294cb02478 affected
9a9a369d6178dd4e263c49085ce1b37e1e8f63a0< 223703d6e8bed50b6a0b47e160877909518d94b9 affected
9a9a369d6178dd4e263c49085ce1b37e1e8f63a0< 6293211d142605bec435229ef0aa3668b8964164 affected
9a9a369d6178dd4e263c49085ce1b37e1e8f63a0< 13a91e8631cfeb68e5b7fd6687f194f5a86e83fe affected
9a9a369d6178dd4e263c49085ce1b37e1e8f63a0< 44a5fd874bb6873bdaec59f722c1d57832fbc9df affected
… +10 more rows
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I. Basic Information for CVE-2026-64503

Vulnerability Information
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Vulnerability Title
iio: accel: kxsd9: fix runtime PM imbalance on write_raw() error
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: iio: accel: kxsd9: fix runtime PM imbalance on write_raw() error kxsd9_write_raw() takes a runtime PM reference with pm_runtime_get_sync() but returns -EINVAL directly when a scale with a non-zero integer part is requested, skipping the matching pm_runtime_put_autosuspend(). This leaks a runtime PM usage-counter reference on every such write, after which the device can no longer autosuspend. Set the error code and fall through to the existing put instead of returning early.
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 4.9版本存在安全漏洞，该漏洞源于write_raw()函数在请求非零整数部分的scale时直接返回错误，未释放运行时PM引用，导致引用泄漏，可能造成设备无法自动挂起，容易受到拒绝服务攻击。
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 9a9a369d6178dd4e263c49085ce1b37e1e8f63a0 ~ a93fd69c1ab0854ac4f5b8439c26dfadb25dfd20 -
Linux Linux 4.9 -

II. Public POCs for CVE-2026-64503

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III. Intelligence Information for CVE-2026-64503

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Patches & Fixes for CVE-2026-64503 (8)

Same Patch Batch · Linux · 2026-07-25 · 274 CVEs total

CVE-2026-64391 9.8 CRITICAL ksmbd: use opener credentials for ADS I/O
CVE-2026-64268 9.8 CRITICAL RDMA/siw: bound Read Response placement to the RREAD length
CVE-2026-64384 9.8 CRITICAL smb: client: fix change notify replay double-free
CVE-2026-64383 9.8 CRITICAL smb: client: fix double-free in SMB2_flush() replay
CVE-2026-64385 9.8 CRITICAL smb: client: fix double-free in SMB2_ioctl() replay
CVE-2026-64386 9.8 CRITICAL smb: client: fix query_info() replay double-free
CVE-2026-64387 9.8 CRITICAL smb: client: fix query directory replay double-free
CVE-2026-64439 9.8 CRITICAL crypto: krb5 - filter out async aead implementations at alloc
CVE-2026-64303 9.8 CRITICAL spi: fsl-lpspi: terminate the RX channel on TX prepare failure path
CVE-2026-64355 9.8 CRITICAL bpf: Reject fragmented frames in devmap
CVE-2026-64459 9.8 CRITICAL tcp: restore RCU grace period in tcp_ao_destroy_sock
CVE-2026-64399 9.8 CRITICAL ksmbd: add permission checks for FSCTL_DUPLICATE_EXTENTS_TO_FILE
CVE-2026-64410 9.8 CRITICAL netfilter: flowtable: IPIP tunnel hardware offload is not yet support
CVE-2026-64397 9.8 CRITICAL ksmbd: serialize QUERY_DIRECTORY requests per file
CVE-2026-64523 9.8 CRITICAL net/handshake: Take a long-lived file reference at submit
CVE-2026-64320 9.1 CRITICAL nvmet: fix pre-auth out-of-bounds heap read in Discovery Get Log Page
CVE-2026-64392 9.1 CRITICAL ksmbd: use opener credentials for delete-on-close
CVE-2026-64269 9.1 CRITICAL RDMA/rtrs-srv: Bound RDMA-Write length to chunk size in rdma_write_sg
CVE-2026-64393 9.1 CRITICAL ksmbd: run set info with opener credentials
CVE-2026-64319 9.1 CRITICAL nvmet-auth: validate reply message payload bounds against transfer length

Showing top 20 of 274 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-64503

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