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CVE-2026-46270— power: supply: rt9455: Fix use-after-free in power_supply_changed()

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rt9455电源供应驱动中IRQ请求在power_supply分配之前，可能导致释放后重用。

CVSS 8.4 · High EPSS 0.19% · P8

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux e86d69dd786e94046b8f5be7df1b9a8226a40b2a< d4e2e3c3caa26b93aa9f36d0a6824b584e2a8dfc affected
e86d69dd786e94046b8f5be7df1b9a8226a40b2a< 62d753b916bd500bb269b7078cdab73198ab4718 affected
e86d69dd786e94046b8f5be7df1b9a8226a40b2a< a39f8f06216f73ef40e71e2fe4ad071964c1fd36 affected
e86d69dd786e94046b8f5be7df1b9a8226a40b2a< af261f218a7606f93d2c786353d60bb4feb56ef0 affected
e86d69dd786e94046b8f5be7df1b9a8226a40b2a< 2178dc65d45e2f7bcaa8af8d80d100419bdab251 affected
e86d69dd786e94046b8f5be7df1b9a8226a40b2a< 64e15155095f39f4dec9b4659da1238ef8fc54d4 affected
e86d69dd786e94046b8f5be7df1b9a8226a40b2a< 721449a15170fc5f028a7576d7f65b9f60d53482 affected
e86d69dd786e94046b8f5be7df1b9a8226a40b2a< e2febe375e5ea5afed92f4cd9711bde8f24ee6d2 affected
… +10 more rows
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I. Basic Information for CVE-2026-46270

Vulnerability Information
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Vulnerability Title
power: supply: rt9455: Fix use-after-free in power_supply_changed()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: power: supply: rt9455: Fix use-after-free in power_supply_changed() Using the `devm_` variant for requesting IRQ _before_ the `devm_` variant for allocating/registering the `power_supply` handle, means that the `power_supply` handle will be deallocated/unregistered _before_ the interrupt handler (since `devm_` naturally deallocates in reverse allocation order). This means that during removal, there is a race condition where an interrupt can fire just _after_ the `power_supply` handle has been freed, *but* just _before_ the corresponding unregistration of the IRQ handler has run. This will lead to the IRQ handler calling `power_supply_changed()` with a freed `power_supply` handle. Which usually crashes the system or otherwise silently corrupts the memory... Note that there is a similar situation which can also happen during `probe()`; the possibility of an interrupt firing _before_ registering the `power_supply` handle. This would then lead to the nasty situation of using the `power_supply` handle *uninitialized* in `power_supply_changed()`. Fix this racy use-after-free by making sure the IRQ is requested _after_ the registration of the `power_supply` handle.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/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rt9455电源供应驱动中IRQ请求在power_supply分配之前，可能导致释放后重用。
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 e86d69dd786e94046b8f5be7df1b9a8226a40b2a ~ d4e2e3c3caa26b93aa9f36d0a6824b584e2a8dfc -
Linux Linux 4.2 -

II. Public POCs for CVE-2026-46270

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III. Intelligence Information for CVE-2026-46270

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Patches & Fixes for CVE-2026-46270 (8)

Same Patch Batch · Linux · 2026-06-03 · 32 CVEs total

CVE-2026-46244 9.1 CRITICAL netfilter: nft_inner: Fix IPv6 inner_thoff desync
CVE-2026-46266 9.1 CRITICAL inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP
CVE-2026-46264 8.8 HIGH drm/xe/pf: Fix sysfs initialization
CVE-2026-46273 8.6 HIGH ibmveth: Disable GSO for packets with small MSS
CVE-2026-46251 8.4 HIGH btrfs: fix block_group_tree dirty_list corruption
CVE-2026-46253 7.8 HIGH pstore/ram: fix buffer overflow in persistent_ram_save_old()
CVE-2026-46259 7.8 HIGH procfs: fix missing RCU protection when reading real_parent in do_task_stat()
CVE-2026-46260 7.8 HIGH ipv6: Fix out-of-bound access in fib6_add_rt2node().
CVE-2026-46263 7.8 HIGH drm/amd/display: Fix out-of-bounds stream encoder index v3
CVE-2026-46271 7.8 HIGH wifi: ath12k: do WoW offloads only on primary link
CVE-2026-46265 7.5 HIGH RDMA/hns: Fix WQ_MEM_RECLAIM warning
CVE-2026-46250 7.3 HIGH MIPS: Work around LLVM bug when gp is used as global register variable
CVE-2026-46246 power: supply: pm8916_lbc: Fix use-after-free for extcon in IRQ handler
CVE-2026-46247 clk: qcom: gfx3d: add parent to parent request map
CVE-2026-46245 drm/amd/display: Fix dc_link NULL handling in HPD init
CVE-2025-71314 drm/panthor: Recover from panthor_gpu_flush_caches() failures
CVE-2026-46248 wifi: ath12k: clear stale link mapping of ahvif->links_map
CVE-2025-71313 PCI: endpoint: Add missing NULL check for alloc_workqueue()
CVE-2026-46249 octeontx2-af: Fix PF driver crash with kexec kernel booting
CVE-2026-46257 clocksource/drivers/timer-sp804: Fix an Oops when read_current_timer is called on ARM32 pl

Showing top 20 of 32 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46270

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