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CVE-2026-46327— dm: fix unlocked test for dm_suspended_md

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dm_blk_report_zones函数在未持有锁的情况下测试设备挂起状态，可能导致设备在测试后立即被挂起。

CVSS 7.8 · High EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1055 · Process Injection

Affected Version Matrix 13

VendorProduct Version RangeStatus
Linux Linux f9c1bdf24615303d48a2d0fd629c88f3189563aa< 175ac0a6115400278d3900f5a04a58b17b3f6cd0 affected
37f53a2c60d03743e0eacf7a0c01c279776fef4e< 7a3385e97af2b6f485fef11e82d8c29adee4be93 affected
37f53a2c60d03743e0eacf7a0c01c279776fef4e< d809a36692ee1394cac85ce6ba7cf8ea58da5812 affected
37f53a2c60d03743e0eacf7a0c01c279776fef4e< 24c405fdbe215c45e57bba672cc42859038491ee affected
d19bc1b4dd5f322980b1f05f79b2ea4f0db10920 affected
6.12.34< 6.12.75 affected
6.15.3< 6.16 affected
6.16 affected
… +5 more rows
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I. Basic Information for CVE-2026-46327

Vulnerability Information
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Vulnerability Title
dm: fix unlocked test for dm_suspended_md
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: dm: fix unlocked test for dm_suspended_md The function dm_blk_report_zones tests if the device is suspended with the "dm_suspended_md" call. However, this function is called without holding any locks, so the device may be suspended just after it. Move the call to dm_suspended_md after dm_get_live_table, so that the device can't be suspended after the suspended state was tested.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/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dm_blk_report_zones函数在未持有锁的情况下测试设备挂起状态，可能导致设备在测试后立即被挂起。
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 f9c1bdf24615303d48a2d0fd629c88f3189563aa ~ 175ac0a6115400278d3900f5a04a58b17b3f6cd0 -
Linux Linux 6.16 -

II. Public POCs for CVE-2026-46327

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III. Intelligence Information for CVE-2026-46327

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Patches & Fixes for CVE-2026-46327 (4)

Same Patch Batch · Linux · 2026-06-09 · 21 CVEs total

CVE-2026-46325 9.8 CRITICAL RDMA/rxe: Fix iova-to-va conversion for MR page sizes != PAGE_SIZE
CVE-2026-46316 9.3 CRITICAL KVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry
CVE-2026-46317 8.8 HIGH KVM: arm64: Reassign nested_mmus array behind mmu_lock
CVE-2026-46326 8.4 HIGH iio: pressure: mprls0025pa: fix spi_transfer struct initialisation
CVE-2026-46332 8.0 HIGH greybus: gb-beagleplay: bound bootloader receive buffering
CVE-2026-52907 7.8 HIGH media: rockchip: rkcif: fix off by one bugs
CVE-2026-46319 7.8 HIGH net/sched: act_ct: Only release RCU read lock after ct_ft
CVE-2026-46330 7.8 HIGH Revert "net/smc: Introduce TCP ULP support"
CVE-2026-46323 7.8 HIGH net: gro: don't merge zcopy skbs
CVE-2026-46324 7.8 HIGH netfilter: nf_tables: use list_del_rcu for netlink hooks
CVE-2026-52906 7.7 HIGH 9p: fix access mode flags being ORed instead of replaced
CVE-2026-46320 7.4 HIGH tap: free page on error paths in tap_get_user_xdp()
CVE-2026-46328 7.3 HIGH apparmor: fix rlimit for posix cpu timers
CVE-2026-46322 7.1 HIGH tun: free page on build_skb failure in tun_xdp_one()
CVE-2026-46321 7.1 HIGH tun: free page on short-frame rejection in tun_xdp_one()
CVE-2026-46329 erofs: handle end of filesystem properly for file-backed mounts
CVE-2026-46318 Revert "mm/hugetlbfs: update hugetlbfs to use mmap_prepare"
CVE-2026-52904 drm/nouveau: fix nvkm_device leak on aperture removal failure
CVE-2026-52905 mm/damon/core: disallow non-power of two min_region_sz on damon_start()
CVE-2026-46315 io_uring/waitid: clear waitid info before copying it to userspace

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46327

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