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NVD / CVE Program· CNA Linux

CVE-2024-27000: serial: mxs-auart: add spinlock around changing cts state

HighCVSS 7.8 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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: 0.32% (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 0dc0637e6b16158af85945425821bfd0151adb37, 21535ef0ac1945080198fe3e4347ea498205c99a, 2c9b943e9924cf1269e44289bc5e60e51b0f5270; cbl2 hyperv-daemons 5.15.153.1-1 on CBL Mariner 2.0 5.15.158.1-1; cbl2 hyperv-daemons 5.15.158.1-1 on CBL Mariner 2.0 5.15.158.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0dc0637e6b16158af85945425821bfd0151adb37, 21535ef0ac1945080198fe3e4347ea498205c99a, 2c9b943e9924cf1269e44289bc5e60e51b0f5270; cbl2 hyperv-daemons 5.15.153.1-1 on CBL Mariner 2.0 5.15.158.1-1; cbl2 hyperv-daemons 5.15.158.1-1 on CBL Mariner 2.0 5.15.158.1-1 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: serial: mxs-auart: add spinlock around changing cts state The uart_handle_cts_change() function in serial_core expects the caller to hold uport->lock. For example, I have seen the below kernel splat, when the Bluetooth driver is loaded on an i.MX28 board. [ 85.119255] ------------[ cut here ]------------ [ 85.124413] WARNING: CPU: 0 PID: 27 at /drivers/tty/serial/serial_core.c:3453 uart_handle_cts_change+0xb4/0xec [ 85.134694] Modules linked in: hci_uart bluetooth ecdh_generic ecc wlcore_sdio configfs [ 85.143314] CPU: 0 PID: 27 Comm: kworker/u3:0 Not tainted 6.6.3-00021-gd62a2f068f92 #1 [ 85.151396] Hardware name: Freescale MXS (Device Tree) [ 85.156679] Workqueue: hci0 hci_power_on [bluetooth] (...) [ 85.191765] uart_handle_cts_change from mxs_auart_irq_handle+0x380/0x3f4 [ 85.198787] mxs_auart_irq_handle from __handle_irq_event_percpu+0x88/0x210 (...)

Published
May 1, 2024
Updated
Jun 17, 2026
EPSS
0.3% · 26th percentile
CWE
—

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

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

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

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  • when exploit code appears or is weaponized
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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
debiandebian linux
fedoraprojectfedora

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

    • 3.18affected
    • 4d90bb147ef6b91f529a21b498ff2b5fdc6785b4 and later · before 56434e295bd446142025913bfdf1587f5e1970adaffected · git
    • 4d90bb147ef6b91f529a21b498ff2b5fdc6785b4 and later · before 21535ef0ac1945080198fe3e4347ea498205c99aaffected · git
    • 4d90bb147ef6b91f529a21b498ff2b5fdc6785b4 and later · before 0dc0637e6b16158af85945425821bfd0151adb37affected · git
    • 4d90bb147ef6b91f529a21b498ff2b5fdc6785b4 and later · before 479244d68f5d94f3903eced52b093c1e01ddb495affected · git
    • 4d90bb147ef6b91f529a21b498ff2b5fdc6785b4 and later · before 2c9b943e9924cf1269e44289bc5e60e51b0f5270affected · git
    • 4d90bb147ef6b91f529a21b498ff2b5fdc6785b4 and later · before 5f40fd6ca2cf0bfbc5a5c9e403dfce8ca899ba37affected · git
    • 4d90bb147ef6b91f529a21b498ff2b5fdc6785b4 and later · before 94b0e65c75f4af888ab2dd6c90f060f762924e86affected · git
    • 4d90bb147ef6b91f529a21b498ff2b5fdc6785b4 and later · before 54c4ec5f8c471b7c1137a1f769648549c423c026affected · git
    • before 3.18not affected · semver
Affected versions · NVD (12)

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

  • debian debian linux10.0
  • fedoraproject fedora38
  • fedoraproject fedora39
  • fedoraproject fedora40
  • linux linux kernel5.16 and later · before 6.1.88
  • linux linux kernel6.2 and later · before 6.6.29
  • linux linux kernel3.18 and later · before 4.19.313
  • linux linux kernel6.7 and later · before 6.8.8
  • linux linux kernel4.20 and later · before 5.4.275
  • linux linux kernel5.5 and later · before 5.10.216
  • linux linux kernel5.11 and later · before 5.15.158
  • linux linux kernel6.9

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.90-16.1.90-1
Debian:13linuxbefore 6.8.9-16.8.9-1

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-2024-26998May 1, 2024 · serial: core: Clearing the circular buffer before NULLifying it
    22Monitor
  • ← EarlierCVE-2024-26999May 1, 2024 · serial/pmac_zilog: Remove flawed mitigation for rx irq flood
    22Monitor
  • Later →CVE-2024-27001May 1, 2024 · comedi: vmk80xx: fix incomplete endpoint checking
    22Monitor

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 Linux0dc0637e6b16158af85945425821bfd0151adb37Vendor (CNA)
Linux Linux21535ef0ac1945080198fe3e4347ea498205c99aVendor (CNA)
Linux Linux2c9b943e9924cf1269e44289bc5e60e51b0f5270Vendor (CNA)
Linux Linux479244d68f5d94f3903eced52b093c1e01ddb495Vendor (CNA)
Linux Linux54c4ec5f8c471b7c1137a1f769648549c423c026Vendor (CNA)
Linux Linux56434e295bd446142025913bfdf1587f5e1970adVendor (CNA)
Linux Linux5f40fd6ca2cf0bfbc5a5c9e403dfce8ca899ba37Vendor (CNA)
Linux Linux94b0e65c75f4af888ab2dd6c90f060f762924e86Vendor (CNA)
cbl2 hyperv-daemons 5.15.153.1-1 on CBL Mariner 2.05.15.158.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 hyperv-daemons 5.15.158.1-1 on CBL Mariner 2.05.15.158.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.90-1 · 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.

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · 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
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 (11 more)

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

All records