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NVD / CVE Program· CNA Linux

CVE-2024-39292: um: Add winch to winch_handlers before registering winch IRQ

MediumCVSS 5.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.24% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 0c02d425a2fbe52643a5859a779db0329e7dddd4, 31960d991e43c8d6dc07245f19fc13398e90ead2, 351d1a64544944b44732f6a64ed65573b00b9e14.
  • Severity is disputed: the assigning authority (CNA) scores it 7.8, NVD 5.5.

Low priority for now. Upgrade to Linux Linux 0c02d425a2fbe52643a5859a779db0329e7dddd4, 31960d991e43c8d6dc07245f19fc13398e90ead2, 351d1a64544944b44732f6a64ed65573b00b9e14 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: um: Add winch to winch_handlers before registering winch IRQ Registering a winch IRQ is racy, an interrupt may occur before the winch is added to the winch_handlers list. If that happens, register_winch_irq() adds to that list a winch that is scheduled to be (or has already been) freed, causing a panic later in winch_cleanup(). Avoid the race by adding the winch to the winch_handlers list before registering the IRQ, and rolling back if um_request_irq() fails.

Published
Jun 24, 2024
Updated
Oct 15, 2026
EPSS
0.2% · 16th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.5
CNA · Linux
7.8
2.3 point gap

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Follow CVE-2024-39292

When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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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.

VendorProduct
linuxlinux kernel

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

    • 2.6.23affected
    • 42a359e31a0e438b5b978a8f0fecdbd3c86bb033 and later · before 66ea9a7c6824821476914bed21a476cd20094f33affected · git
    • 42a359e31a0e438b5b978a8f0fecdbd3c86bb033 and later · before dc1ff95602ee908fcd7d8acee7a0dadb61b1a0c0affected · git
    • 42a359e31a0e438b5b978a8f0fecdbd3c86bb033 and later · before 351d1a64544944b44732f6a64ed65573b00b9e14affected · git
    • 42a359e31a0e438b5b978a8f0fecdbd3c86bb033 and later · before 31960d991e43c8d6dc07245f19fc13398e90ead2affected · git
    • 42a359e31a0e438b5b978a8f0fecdbd3c86bb033 and later · before 0c02d425a2fbe52643a5859a779db0329e7dddd4affected · git
    • 42a359e31a0e438b5b978a8f0fecdbd3c86bb033 and later · before 434a06c38ee1217a8baa0dd7c37cc85d50138fb0affected · git
    • 42a359e31a0e438b5b978a8f0fecdbd3c86bb033 and later · before 73b8e21f76c7dda4905655d2e2c17dc5a73b87f1affected · git
    • 42a359e31a0e438b5b978a8f0fecdbd3c86bb033 and later · before a0fbbd36c156b9f7b2276871d499c9943dfe5101affected · git
    • before 2.6.23not affected · semver
Affected versions · NVD (9)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernelbefore 2.6.23
  • linux linux kernel4.19 and later · before 4.19.316
  • linux linux kernel5.4 and later · before 5.4.278
  • linux linux kernel5.10 and later · before 5.10.219
  • linux linux kernel5.15 and later · before 5.15.161
  • linux linux kernel6.1 and later · before 6.1.93
  • linux linux kernel6.6 and later · before 6.6.33
  • linux linux kernel6.9 and later · before 6.9.4
  • linux linux kernel6.10.0

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.94-16.1.94-1
Debian:13linuxbefore 6.9.7-16.9.7-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe…KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2024-33847Jun 24, 2024 · f2fs: compress: don't allow unaligned truncation on released compress inode
    22Monitor
  • ← EarlierCVE-2024-34027Jun 24, 2024 · f2fs: compress: fix to cover {reserve,release}_compress_blocks() w/ cp_rwsem lock
    31Monitor
  • Later →CVE-2021-4440Jun 25, 2024 · x86/xen: Drop USERGS_SYSRET64 paravirt call
    35Monitor

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 Linux0c02d425a2fbe52643a5859a779db0329e7dddd4Vendor (CNA)
Linux Linux31960d991e43c8d6dc07245f19fc13398e90ead2Vendor (CNA)
Linux Linux351d1a64544944b44732f6a64ed65573b00b9e14Vendor (CNA)
Linux Linux434a06c38ee1217a8baa0dd7c37cc85d50138fb0Vendor (CNA)
Linux Linux66ea9a7c6824821476914bed21a476cd20094f33Vendor (CNA)
Linux Linux73b8e21f76c7dda4905655d2e2c17dc5a73b87f1Vendor (CNA)
Linux Linuxa0fbbd36c156b9f7b2276871d499c9943dfe5101Vendor (CNA)
Linux Linuxdc1ff95602ee908fcd7d8acee7a0dadb61b1a0c0Vendor (CNA)
debian:linux6.1.94-1 · 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.

Variant candidates

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

  • CVE-2024-3581438 days apartswiotlb: Fix double-allocation of slots due to broken alignment handling
    35Monitor
  • CVE-2024-386273 days apartstm class: Fix a double free in stm_register_device()
    31Monitor
  • CVE-2022-487404 days apartselinux: fix double free of cond_list on error paths
    31Monitor
  • CVE-2021-475895 days apartigbvf: fix double free in `igbvf_probe`
    31Monitor
  • CVE-2024-369737 days apartmisc: microchip: pci1xxxx: fix double free in the error handling of gp_aux_bus_probe()
    31Monitor
  • CVE-2024-4094018 days apartnet/mlx5: Fix tainted pointer delete is case of flow rules creation fail
    31Monitor

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-415 · Double Free

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

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.

References

Show all references (10 more)

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

All records