CVE-2023-53730

System hang via incorrect IRQ-state restoration

Published Oct 22, 2025 · Updated Oct 22, 2025

Denial of service in Linux kernel 5.10 allows local users to hang the system through blk-iocost block-I/O request merging. adjust_inuse_and_calc_cost() releases bfqd->lock with spin_unlock_irq(), enabling interrupts when its caller entered with interrupts disabled and allowing an interrupt handler to reacquire the held lock. Triggering the deadlock requires local low-privileged access and the affected block-I/O control path; the bounded consequence is a system hang.

CVSS severity5.7
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux kernel 5.10 allows local users to hang the system through blk-iocost block-I/O request merging. adjust_inuse_and_calc_cost() releases bfqd->lock with spin_unlock_irq(), enabling interrupts when its caller entered with interrupts disabled and allowing an interrupt handler to reacquire the held lock. Triggering the deadlock requires local low-privileged access and the affected block-I/O control path; the bounded consequence is a system hang.

The record

CVE
CVE-2023-53730
Published
Oct 22, 2025
Updated
Oct 22, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 22, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.10
  2. Affected versionversion=b0853ab4a238c54b8f97ca7dde1ae156e2bbd5e4 <3376c4fe2db4aea2dc721a27a999c41fdb45b54f
  3. Affected versionversion=b0853ab4a238c54b8f97ca7dde1ae156e2bbd5e4 <8563b58a4360e648ce18f0e98a75a4be51667431
  4. Affected versionversion=b0853ab4a238c54b8f97ca7dde1ae156e2bbd5e4 <8ceeb3fc86a83700bb1585c189006080a47e8506
  5. Affected versionversion=b0853ab4a238c54b8f97ca7dde1ae156e2bbd5e4 <8d211554679d0b23702bd32ba04aeac0c1c4f660
  6. Affected versionversion=b0853ab4a238c54b8f97ca7dde1ae156e2bbd5e4 <9279a1b74ad98039d5d44d26b9e7a9cfe655b6d3
  7. Affected versionversion=b0853ab4a238c54b8f97ca7dde1ae156e2bbd5e4 <eb120c0aff5ceab9c9c46b87f302465bbf2bbaed

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.10; version=b0853ab4a238c54b8f97ca7dde1ae156e2bbd5e4 <3376c4fe2db4aea2dc721a27a999c41fdb45b54f; version=b0853ab4a238c54b8f97ca7dde1ae156e2bbd5e4 <8563b58a4360e648ce18f0e98a75a4be51667431; version=b0853ab4a238c54b8f97ca7dde1ae156e2bbd5e4 <8ceeb3fc86a83700bb1585c189006080a47e8506; version=b0853ab4a238c54b8f97ca7dde1ae156e2bbd5e4 <8d211554679d0b23702bd32ba04aeac0c1c4f660; version=b0853ab4a238c54b8f97ca7dde1ae156e2bbd5e4 <9279a1b74ad98039d5d44d26b9e7a9cfe655b6d3; version=b0853ab4a238c54b8f97ca7dde1ae156e2bbd5e4 <eb120c0aff5ceab9c9c46b87f302465bbf2bbaed

Published CVSS scores

5.7SUSECVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
4.7SUSECVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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