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CVE-2026-53314— padata: Put CPU offline callback in ONLINE section to allow failure

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基金会开源的操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于padata CPU离线回调在在线部分中处理不当，可能导致CPU下线错误。

AI Predicted 5.5 Difficulty: Trivial EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 894c9ef9780c5cf2f143415e867ee39a33ecb75d< 65dae8b34f0810f3fa9f77c4c63650cd20820693 affected
894c9ef9780c5cf2f143415e867ee39a33ecb75d< a6d44f477000c6352de6b05e9e276e62083e5fbf affected
894c9ef9780c5cf2f143415e867ee39a33ecb75d< 3e6c08dd97dcd22a00aee469e0adfa819071d80e affected
894c9ef9780c5cf2f143415e867ee39a33ecb75d< 5a9f29a3e076b637d2234093e57989cf755ded5b affected
894c9ef9780c5cf2f143415e867ee39a33ecb75d< 9afe53f14a2aae8c4beb30e5ea51641a34f1a3d3 affected
894c9ef9780c5cf2f143415e867ee39a33ecb75d< c8c4a2972f83c8b68ff03b43cecdb898939ff851 affected
2b1207801c393a5e9af2fbac2dd8b0377d8ae63a affected
0685dfa0a2ff7635c0b64f7b7f0fafbf1c3e0c14 affected
… +12 more rows
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I. Basic Information for CVE-2026-53314

Vulnerability Information
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Vulnerability Title
padata: Put CPU offline callback in ONLINE section to allow failure
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: padata: Put CPU offline callback in ONLINE section to allow failure syzbot reported the following warning: DEAD callback error for CPU1 WARNING: kernel/cpu.c:1463 at _cpu_down+0x759/0x1020 kernel/cpu.c:1463, CPU#0: syz.0.1960/14614 at commit 4ae12d8bd9a8 ("Merge tag 'kbuild-fixes-7.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux") which tglx traced to padata_cpu_dead() given it's the only sub-CPUHP_TEARDOWN_CPU callback that returns an error. Failure isn't allowed in hotplug states before CPUHP_TEARDOWN_CPU so move the CPU offline callback to the ONLINE section where failure is possible.
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基金会开源的操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于padata CPU离线回调在在线部分中处理不当，可能导致CPU下线错误。
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 894c9ef9780c5cf2f143415e867ee39a33ecb75d ~ 65dae8b34f0810f3fa9f77c4c63650cd20820693 -
Linux Linux 5.6 -

II. Public POCs for CVE-2026-53314

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III. Intelligence Information for CVE-2026-53314

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Patches & Fixes for CVE-2026-53314 (6)

Same Patch Batch · Linux · 2026-06-26 · 47 CVEs total

CVE-2026-53309 9.8 CRITICAL ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison
CVE-2026-53281 8.8 HIGH iommu/vt-d: Avoid NULL pointer dereference or refcount corruption
CVE-2026-53322 8.8 HIGH vfio/pci: Clean up DMABUFs before disabling function
CVE-2026-53300 7.8 HIGH net: enetc: fix NTMP DMA use-after-free issue
CVE-2026-53290 7.8 HIGH drm/xe/eustall: Fix drm_dev_put called before stream disable in close
CVE-2026-53284 7.5 HIGH btrfs: only release the dirty pages io tree after successful writes
CVE-2026-53310 soc/tegra: cbb: Fix cross-fabric target timeout lookup
CVE-2026-53324 net: mana: Use pci_name() for debugfs directory naming
CVE-2026-53319 blk-wbt: remove WARN_ON_ONCE from wbt_init_enable_default()
CVE-2026-53321 io_uring/napi: cap busy_poll_to 10 msec
CVE-2026-53320 nilfs2: reject zero bd_oblocknr in nilfs_ioctl_mark_blocks_dirty()
CVE-2026-53323 net: dsa: remove redundant netdev_lock_ops() from conduit ethtool ops
CVE-2026-53312 iommu/riscv: Remove overflows on the invalidation path
CVE-2026-53311 fuse: fix uninit-value in fuse_dentry_revalidate()
CVE-2026-53304 scsi: sg: Resolve soft lockup issue when opening /dev/sgX
CVE-2026-53308 power: supply: max77705: Free allocated workqueue and fix removal order
CVE-2026-53307 pinctrl: pinconf-generic: Fully validate 'pinmux' property
CVE-2026-53305 usb: typec: ps883x: Fix Oops at unbind
CVE-2026-53306 tty: hvc_iucv: fix off-by-one in number of supported devices
CVE-2026-53301 reset: amlogic: t7: Fix null reset ops

Showing top 20 of 47 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-53314

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