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CVE-2023-52818· NVD / CVE Program· CNA Linux

drm/amd: Fix UBSAN array-index-out-of-bounds for SMU7

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: 0.25% (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 6dffdddfca818c02a42b6caa1d9845995f0a1f94, 760efbca74a405dc439a013a5efaa9fadc95a8c3, 8af28ae3acb736ada4ce3457662fa446cc913bb4.

Low priority for now. Upgrade to Linux Linux 6dffdddfca818c02a42b6caa1d9845995f0a1f94, 760efbca74a405dc439a013a5efaa9fadc95a8c3, 8af28ae3acb736ada4ce3457662fa446cc913bb4 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: drm/amd: Fix UBSAN array-index-out-of-bounds for SMU7 For pptable structs that use flexible array sizes, use flexible arrays.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
May 21, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 16th percentile

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 · 0.2%

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-2023-52818

When you'll hear from us

  • when it enters CISA KEV
  • 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

Affected versions

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

  • linux linux kernelbefore 4.14.331
  • linux linux kernel4.15 and later · before 4.19.300
  • linux linux kernel4.20 and later · before 5.4.262
  • linux linux kernel5.5 and later · before 5.10.202
  • linux linux kernel5.11 and later · before 5.15.140
  • linux linux kernel5.16 and later · before 6.1.64
  • linux linux kernel6.2 and later · before 6.5.13
  • linux linux kernel6.6 and later · before 6.6.3

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

    • 4.5affected
    • c82baa28184356a75c0157129f88af42b2e7b695 and later · before e52e324a21341c97350d5f11de14721c1c609498affected · git
    • c82baa28184356a75c0157129f88af42b2e7b695 and later · before cfd8cd907fd94538561479a43aea455f5cf16928affected · git
    • c82baa28184356a75c0157129f88af42b2e7b695 and later · before c847379a5d00078ad6fcb1c24230e72c5609342faffected · git
    • c82baa28184356a75c0157129f88af42b2e7b695 and later · before 8af28ae3acb736ada4ce3457662fa446cc913bb4affected · git
    • c82baa28184356a75c0157129f88af42b2e7b695 and later · before acdb6830de02cf2873aeaccdf2d9bca4aee50e47affected · git
    • c82baa28184356a75c0157129f88af42b2e7b695 and later · before fc9ac0e8e0bcb3740c6eaad3a1a50c20016d422baffected · git
    • c82baa28184356a75c0157129f88af42b2e7b695 and later · before 6dffdddfca818c02a42b6caa1d9845995f0a1f94affected · git
    • c82baa28184356a75c0157129f88af42b2e7b695 and later · before 92a775e7c9707aed28782bafe636bf87675f5a97affected · git
    • c82baa28184356a75c0157129f88af42b2e7b695 and later · before 760efbca74a405dc439a013a5efaa9fadc95a8c3affected · git

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.64-16.1.64-1
Debian:13linuxbefore 6.6.8-16.6.8-1
SUSE:Linux Enterprise Real Time 12 SP5kernel-rtbefore 4.12.14-10.194.14.12.14-10.194.1
SUSE:Linux Enterprise Real Time 12 SP5kernel-rt_debugbefore 4.12.14-10.194.14.12.14-10.194.1
SUSE:Linux Enterprise Real Time 12 SP5kernel-source-rtbefore 4.12.14-10.194.14.12.14-10.194.1
SUSE:Linux Enterprise Real Time 12 SP5kernel-syms-rtbefore 4.12.14-10.194.14.12.14-10.194.1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • 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
  • CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
    83Now

Published before and after this one in the same product

  • ← EarlierCVE-2023-52816May 21, 2024 · drm/amdkfd: Fix shift out-of-bounds issue
    31Monitor
  • ← EarlierCVE-2023-52817May 21, 2024 · drm/amdgpu: Fix a null pointer access when the smc_rreg pointer is NULL
    22Monitor
  • Later →CVE-2023-52819May 21, 2024 · drm/amd: Fix UBSAN array-index-out-of-bounds for Polaris and Tonga
    26Monitor

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 Linux6dffdddfca818c02a42b6caa1d9845995f0a1f94Vendor (CNA)
Linux Linux760efbca74a405dc439a013a5efaa9fadc95a8c3Vendor (CNA)
Linux Linux8af28ae3acb736ada4ce3457662fa446cc913bb4Vendor (CNA)
Linux Linux92a775e7c9707aed28782bafe636bf87675f5a97Vendor (CNA)
Linux Linuxacdb6830de02cf2873aeaccdf2d9bca4aee50e47Vendor (CNA)
Linux Linuxc847379a5d00078ad6fcb1c24230e72c5609342fVendor (CNA)
Linux Linuxcfd8cd907fd94538561479a43aea455f5cf16928Vendor (CNA)
Linux Linuxe52e324a21341c97350d5f11de14721c1c609498Vendor (CNA)
Linux Linuxfc9ac0e8e0bcb3740c6eaad3a1a50c20016d422bVendor (CNA)
debian:linux6.1.64-1 · Debian:12Package registry (OSV)
suse:kernel-rt4.12.14-10.194.1 · SUSE:Linux Enterprise Real Time 12 SP5Package registry (OSV)
suse:kernel-rt_debug4.12.14-10.194.1 · SUSE:Linux Enterprise Real Time 12 SP5Package registry (OSV)
suse:kernel-source-rt4.12.14-10.194.1 · SUSE:Linux Enterprise Real Time 12 SP5Package registry (OSV)
suse:kernel-syms-rt4.12.14-10.194.1 · SUSE:Linux Enterprise Real Time 12 SP5Package 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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

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.

  • CVE-2021-475483 days apartethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port()
    39Monitor
  • CVE-2023-2008403 days apartKernel: udmabuf: improper validation of array index leading to local privilege escalation
    32Monitor
  • CVE-2023-527990 days apartjfs: fix array-index-out-of-bounds in dbFindLeaf
    31Monitor
  • CVE-2023-528040 days apartfs/jfs: Add validity check for db_maxag and db_agpref
    31Monitor
  • CVE-2023-528120 days apartdrm/amd: check num of link levels when update pcie param
    31Monitor
  • CVE-2023-528350 days apartperf/core: Bail out early if the request AUX area is out of bound
    31Monitor

Chain candidates

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

—

Bug bounty scope

No known public program.

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

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)

CWE-129 · Improper Validation of Array Index

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.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (8 more)

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

All records