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NVD / CVE Program· CNA Linux

CVE-2023-52749: spi: Fix null dereference on suspend

MediumCVSS 4.7 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 18/100)

  • 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: 0.18% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: Linux Linux 4ec4508db97502a12daee88c74782e8d35ced068, 96474ea47dc67b0704392d59192b233c8197db0e, bef4a48f4ef798c4feddf045d49e53c8a97d5e37.

Low priority for now. Upgrade to Linux Linux 4ec4508db97502a12daee88c74782e8d35ced068, 96474ea47dc67b0704392d59192b233c8197db0e, bef4a48f4ef798c4feddf045d49e53c8a97d5e37 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: spi: Fix null dereference on suspend A race condition exists where a synchronous (noqueue) transfer can be active during a system suspend. This can cause a null pointer dereference exception to occur when the system resumes. Example order of events leading to the exception: 1. spi_sync() calls __spi_transfer_message_noqueue() which sets ctlr->cur_msg 2. Spi transfer begins via spi_transfer_one_message() 3. System is suspended interrupting the transfer context 4. System is resumed 6. spi_controller_resume() calls spi_start_queue() which resets cur_msg to NULL 7. Spi transfer context resumes and spi_finalize_current_message() is called which dereferences cur_msg (which is now NULL) Wait for synchronous transfers to complete before suspending by acquiring the bus mutex and setting/checking a suspend flag.

Published
May 21, 2024
Updated
Jun 17, 2026
EPSS
0.1% · 7th percentile

Report tools

JSON

Action score

18

Monitor

Low priority for now.

CVSS
18 / 40 · 4.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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.

Follow CVE-2023-52749

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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

    • 6.0affected
    • 6.1.66 and later · up to and including 6.1.*not affected · semver
    • ae7d2346dc89ae89a6e0aabe6037591a11e593c0 and later · before 4ec4508db97502a12daee88c74782e8d35ced068affected · git
    • ae7d2346dc89ae89a6e0aabe6037591a11e593c0 and later · before 96474ea47dc67b0704392d59192b233c8197db0eaffected · git
    • ae7d2346dc89ae89a6e0aabe6037591a11e593c0 and later · before bef4a48f4ef798c4feddf045d49e53c8a97d5e37affected · git
    • before 6.0not affected · semver
    • 6.6.3 and later · up to and including 6.6.*not affected · semver
    • 6.7 and laternot affected · original_commit_for_fix

Affected versions

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

  • linux linux kernelbefore 6.1.66
  • linux linux kernel6.2 and later · before 6.6.3

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.66-16.1.66-1
Debian:13linuxbefore 6.6.8-16.6.8-1
openSUSE:Leap 15.6dtb-aarch64before 6.4.0-150600.23.14.16.4.0-150600.23.14.1
openSUSE:Leap 15.6kernel-64kbbefore 6.4.0-150600.23.14.16.4.0-150600.23.14.1
openSUSE:Leap 15.6kernel-azurebefore 6.4.0-150600.8.8.26.4.0-150600.8.8.2
openSUSE:Leap 15.6kernel-debugbefore 6.4.0-150600.23.14.26.4.0-150600.23.14.2
openSUSE:Leap 15.6kernel-defaultbefore 6.4.0-150600.23.14.26.4.0-150600.23.14.2
openSUSE:Leap 15.6kernel-default-basebefore 6.4.0-150600.23.14.2.150600.12.4.36.4.0-150600.23.14.2.150600.12.4.3
openSUSE:Leap 15.6kernel-docsbefore 6.4.0-150600.23.14.26.4.0-150600.23.14.2
openSUSE:Leap 15.6kernel-kvmsmallbefore 6.4.0-150600.23.14.26.4.0-150600.23.14.2
openSUSE:Leap 15.6kernel-obs-buildbefore 6.4.0-150600.23.14.26.4.0-150600.23.14.2
openSUSE:Leap 15.6kernel-obs-qabefore 6.4.0-150600.23.14.26.4.0-150600.23.14.2
openSUSE:Leap 15.6kernel-sourcebefore 6.4.0-150600.23.14.26.4.0-150600.23.14.2
openSUSE:Leap 15.6kernel-source-azurebefore 6.4.0-150600.8.8.26.4.0-150600.8.8.2
openSUSE:Leap 15.6kernel-symsbefore 6.4.0-150600.23.14.26.4.0-150600.23.14.2
openSUSE:Leap 15.6kernel-syms-azurebefore 6.4.0-150600.8.8.16.4.0-150600.8.8.1
openSUSE:Leap 15.6kernel-zfcpdumpbefore 6.4.0-150600.23.14.26.4.0-150600.23.14.2
Red Hat:rhel_eus:9.2::appstreambpftool-debuginfobefore 0:7.0.0-284.95.1.el9_20:7.0.0-284.95.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-64k-debug-debuginfobefore 0:5.14.0-284.95.1.el9_20:5.14.0-284.95.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-64k-debug-develbefore 0:5.14.0-284.95.1.el9_20:5.14.0-284.95.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-64k-debug-devel-matchedbefore 0:5.14.0-284.95.1.el9_20:5.14.0-284.95.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-64k-debuginfobefore 0:5.14.0-284.95.1.el9_20:5.14.0-284.95.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-64k-develbefore 0:5.14.0-284.95.1.el9_20:5.14.0-284.95.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-64k-devel-matchedbefore 0:5.14.0-284.95.1.el9_20:5.14.0-284.95.1.el9_2

+96

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-2023-52747May 21, 2024 · IB/hfi1: Restore allocated resources on failed copyout
    22Monitor
  • ← EarlierCVE-2023-52748May 21, 2024 · f2fs: avoid format-overflow warning
    31Monitor
  • Later →CVE-2023-52750May 21, 2024 · arm64: Restrict CPU_BIG_ENDIAN to GNU as or LLVM IAS 15.x or newer
    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 Linux4ec4508db97502a12daee88c74782e8d35ced068Vendor (CNA)
Linux Linux96474ea47dc67b0704392d59192b233c8197db0eVendor (CNA)
Linux Linuxbef4a48f4ef798c4feddf045d49e53c8a97d5e37Vendor (CNA)
debian:linux6.1.66-1 · Debian:12Package registry (OSV)
opensuse:dtb-aarch646.4.0-150600.23.14.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-64kb6.4.0-150600.23.14.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-debug6.4.0-150600.23.14.2 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-default6.4.0-150600.23.14.2 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-default-base6.4.0-150600.23.14.2.150600.12.4.3 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-docs6.4.0-150600.23.14.2 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-kvmsmall6.4.0-150600.23.14.2 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-obs-build6.4.0-150600.23.14.2 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-obs-qa6.4.0-150600.23.14.2 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-source6.4.0-150600.23.14.2 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-syms6.4.0-150600.23.14.2 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-zfcpdump6.4.0-150600.23.14.2 · openSUSE:Leap 15.6Package registry (OSV)
red hat:bpftool-debuginfo0:7.0.0-284.95.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-debuginfo0:5.14.0-284.95.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel0:5.14.0-284.95.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel-matched0:5.14.0-284.95.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-64k-debuginfo0:5.14.0-284.95.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-64k-devel0:5.14.0-284.95.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-64k-devel-matched0:5.14.0-284.95.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-debug-debuginfo0:5.14.0-284.95.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-debug-devel0:5.14.0-284.95.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-debug-devel-matched0:5.14.0-284.95.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-debuginfo0:5.14.0-284.95.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-debuginfo-common-aarch640:5.14.0-284.95.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
suse:kernel-64kb6.4.0-150600.23.14.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP6Package registry (OSV)
suse:kernel-azure6.4.0-150600.8.8.2 · SUSE:Linux Enterprise Module for Public Cloud 15 SP6Package registry (OSV)

+10

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.

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.
  • Special conditions such as timing or configuration are required.

If successful

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

Weakness class (CWE)

CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSS vector

CVSS:3.1/AV:L/AC:H/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.

ATT&CK techniques

—

References

Show all references (2 more)

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

All records