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NVD / CVE Program· CNA Linux

CVE-2023-54024: KVM: Destroy target device if coalesced MMIO unregistration fails

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.19% (FIRST EPSS).
  • Fixed version: Linux Linux 10c2a20d73e99463e69b7e92706791656adc16d7, 5.10.173, 5.12.

Low priority for now. Upgrade to Linux Linux 10c2a20d73e99463e69b7e92706791656adc16d7, 5.10.173, 5.12 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: KVM: Destroy target device if coalesced MMIO unregistration fails Destroy and free the target coalesced MMIO device if unregistering said device fails. As clearly noted in the code, kvm_io_bus_unregister_dev() does not destroy the target device. BUG: memory leak unreferenced object 0xffff888112a54880 (size 64): comm "syz-executor.2", pid 5258, jiffies 4297861402 (age 14.129s) hex dump (first 32 bytes): 38 c7 67 15 00 c9 ff ff 38 c7 67 15 00 c9 ff ff 8.g.....8.g..... e0 c7 e1 83 ff ff ff ff 00 30 67 15 00 c9 ff ff .........0g..... backtrace: [<0000000006995a8a>] kmalloc include/linux/slab.h:556 [inline] [<0000000006995a8a>] kzalloc include/linux/slab.h:690 [inline] [<0000000006995a8a>] kvm_vm_ioctl_register_coalesced_mmio+0x8e/0x3d0 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:150 [<00000000022550c2>] kvm_vm_ioctl+0x47d/0x1600 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3323 [<000000008a75102f>] vfs_ioctl fs/ioctl.c:46 [inline] [<000000008a75102f>] file_ioctl fs/ioctl.c:509 [inline] [<000000008a75102f>] do_vfs_ioctl+0xbab/0x1160 fs/ioctl.c:696 [<0000000080e3f669>] ksys_ioctl+0x76/0xa0 fs/ioctl.c:713 [<0000000059ef4888>] __do_sys_ioctl fs/ioctl.c:720 [inline] [<0000000059ef4888>] __se_sys_ioctl fs/ioctl.c:718 [inline] [<0000000059ef4888>] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:718 [<000000006444fa05>] do_syscall_64+0x9f/0x4e0 arch/x86/entry/common.c:290 [<000000009a4ed50b>] entry_SYSCALL_64_after_hwframe+0x49/0xbe BUG: leak checking failed

—No exploit Fix available
Published
Dec 24, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 8th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 168e82f640ed1891a700bdb43e37da354b2ab63c, 50cbad42bfea8c052b7ca590bd4126cdc898713c, 5.13affected
    • 7d1bc32d6477ff96a32695ea4be8144e4513ab2d and later · before 10c2a20d73e99463e69b7e92706791656adc16d7affected · git
    • 2a20592baff59c5351c5200ec667e1a2aa22af85 and later · before 76a9886e1b61ce5592df5ae78a19ed30399ae189affected · git
    • 5d3c4c79384af06e3c8e25b7770b6247496b4417 and later · before 999439fd5da5a76253e2f2c37b94204f47d75491affected · git
    • 5d3c4c79384af06e3c8e25b7770b6247496b4417 and later · before ccf6a7fb1aedb1472e1241ee55e4d26b68f8d066affected · git
    • 5d3c4c79384af06e3c8e25b7770b6247496b4417 and later · before fb436dd6914325075f07d19851ab277b7a693ae7affected · git
    • 5d3c4c79384af06e3c8e25b7770b6247496b4417 and later · before b1cb1fac22abf102ffeb29dd3eeca208a3869d54affected · git
    • 5.4.119 and later · before 5.4.235affected · semver
    • 5.10.37 and later · before 5.10.173affected · semver
    • 5.11.21 and later · before 5.12affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.20-16.1.20-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2023-54022Dec 24, 2025 · ALSA: usb-audio: Fix potential memory leaks at error path for UMP open
    0Monitor
  • ← EarlierCVE-2023-54023Dec 24, 2025 · btrfs: fix race between balance and cancel/pause
    0Monitor
  • Later →CVE-2023-54025Dec 24, 2025 · wifi: rsi: Do not configure WoWlan in shutdown hook if not enabled
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux10c2a20d73e99463e69b7e92706791656adc16d7Vendor (CNA)
Linux Linux5.10.173Vendor (CNA)
Linux Linux5.12Vendor (CNA)
Linux Linux5.13Vendor (CNA)
Linux Linux5.4.235Vendor (CNA)
Linux Linux76a9886e1b61ce5592df5ae78a19ed30399ae189Vendor (CNA)
Linux Linux999439fd5da5a76253e2f2c37b94204f47d75491Vendor (CNA)
Linux Linuxb1cb1fac22abf102ffeb29dd3eeca208a3869d54Vendor (CNA)
Linux Linuxccf6a7fb1aedb1472e1241ee55e4d26b68f8d066Vendor (CNA)
Linux Linuxfb436dd6914325075f07d19851ab277b7a693ae7Vendor (CNA)
debian:linux6.1.20-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

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No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

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Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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References

Show all references (5 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records