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CVE-2026-99022— regulator: ltc3676: don't read the write-only HRST and CLIRQ registers

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.

在 Linux 内核中，以下漏洞已得到修复： regulator: ltc3676：禁止读取仅可写的 HRST 和 CLIRQ 寄存器 HRST（0x1e）和 CLIRQ（0x1f）是仅可写的命令触发寄存器。向 HRST 写入会触发芯片硬复位，向 CLIRQ 写入则清除中断；而读取这些寄存器不仅无法获取有效数据，读取操作本身还会意外触发对应的命令。 这导致简单的寄存器转储操作即可导致系统重启： 该命令会遍历所有可读寄存器，当访问到 HRST 时便会触发复位，从而导致主板重启。 修复方案是将回调函数重新拆分为两个独立

AI Predicted 6.5 Difficulty: Moderate EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1069.001 · Local Groups

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 37b918a034feda1b1ef404acf003812f37ab8da2< fd376d83741118e0212f0da985889c1a98d9c827 affected
37b918a034feda1b1ef404acf003812f37ab8da2< 1fb0d58fd363b439b4faf08a16ee6ae38b575cd4 affected
37b918a034feda1b1ef404acf003812f37ab8da2< 199a62d70314d21f06a9a6faaa3ef54d0404910c affected
37b918a034feda1b1ef404acf003812f37ab8da2< ca5d85335a8fa6e87b45629f1a07b412482cab17 affected
37b918a034feda1b1ef404acf003812f37ab8da2< 28c2388ee24cdbefbcc458fa41ef7bffaaa1cc83 affected
4.9 affected
< 4.9 unaffected
6.6.160≤ 6.6.* unaffected
… +4 more rows
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I. Basic Information for CVE-2026-99022

Vulnerability Information
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Vulnerability Title
regulator: ltc3676: don't read the write-only HRST and CLIRQ registers
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: regulator: ltc3676: don't read the write-only HRST and CLIRQ registers HRST (0x1e) and CLIRQ (0x1f) are write-only command strobes. Writing HRST triggers a hard reset of the chip and writing CLIRQ clears the interrupt; reading them returns nothing useful, and the read itself fires the command. The result is that a plain register dump resets the board: cat /sys/kernel/debug/regmap/2-003c/registers walks every readable register, hits HRST, and the board reboots. Split the callback back in two so HRST and CLIRQ stay writable but are no longer readable. The readable range is left unchanged (LTC3676_BUCK1 ... LTC3676_IRQSTAT).
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 37b918a034feda1b1ef404acf003812f37ab8da2 ~ fd376d83741118e0212f0da985889c1a98d9c827 -
Linux Linux 4.9 -

II. Public POCs for CVE-2026-99022

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III. Intelligence Information for CVE-2026-99022

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Patches & Fixes for CVE-2026-99022 (5)

Same Patch Batch · Linux · 2026-10-23 · 217 CVEs total

CVE-2026-98959 9.8 CRITICAL btrfs: fix xattr replace when multiple xattrs are packed in the same item
CVE-2026-99078 9.8 CRITICAL net/mlx5e: Prevent stale XSK buffer release on MPWQE refill retry
CVE-2026-99079 9.8 CRITICAL net/mlx5e: Prevent stale XSK buffer release on refill retry
CVE-2026-98988 8.8 HIGH namespace: keep covered mounts covered in OPEN_TREE_NAMESPACE
CVE-2026-99083 8.8 HIGH ksmbd: fix heap out-of-bounds write in krb5_authenticate()
CVE-2026-99082 8.8 HIGH KVM: x86: Use active memslots for the per-vCPU MMIO cache
CVE-2026-98870 8.8 HIGH ksmbd: remove stale channels from all sessions on teardown
CVE-2026-98980 8.8 HIGH namei: don't reveal overmounted entries in refwalk
CVE-2026-98981 8.8 HIGH namespace: unhash a dentry before detaching the mounts on it
CVE-2026-99042 8.4 HIGH io_uring/net: populate CONNECT filter fields for 24-byte sockaddr_in6
CVE-2026-98978 8.4 HIGH namespace: never expire a locked mount
CVE-2026-99064 8.1 HIGH cipso: adjust cached option offsets when removing CIPSO
CVE-2026-98968 8.1 HIGH amt: send the relay's General Query directly from the receive path
CVE-2026-98899 7.8 HIGH netfilter: ipset: mark the rcu locked areas properly
CVE-2026-99018 7.8 HIGH riscv: entry: gate shadow call stack reload on sstatus.SPP, not tp
CVE-2026-99002 7.8 HIGH drm/vmwgfx: validate pitch coming from userspace
CVE-2026-99016 7.8 HIGH riscv: futex: untag the user pointer before the atomic access
CVE-2026-99051 7.8 HIGH fsverity: RCU-delay the freeing of struct fsverity_info
CVE-2026-99032 7.8 HIGH net/smc: protect clcsock lifetime in smc_getname
CVE-2026-98999 7.8 HIGH drm/xe: Fix stale pinned_link entry when fb-pin performs the final unpin

Showing top 20 of 217 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

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Same vendor: Linux