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NVD / CVE Program· CNA redhat

CVE-2023-39191: Kernel: ebpf: insufficient stack type checks in dynptr

Noroxi assessment

Priority: Monitor (action score 32/100)

  • 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: 0.53% (FIRST EPSS).
  • Someone with local access to the system can trigger it. Administrator privileges are required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: linux (Debian:13) 6.3.7-1; dtb-aarch64 (openSUSE:Leap 15.5) 5.14.21-150500.55.36.1; kernel-64kb (openSUSE:Leap 15.5) 5.14.21-150500.55.36.1.

Low priority for now. Upgrade to linux (Debian:13) 6.3.7-1; dtb-aarch64 (openSUSE:Leap 15.5) 5.14.21-150500.55.36.1; kernel-64kb (openSUSE:Leap 15.5) 5.14.21-150500.55.36.1 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

An improper input validation flaw was found in the eBPF subsystem in the Linux kernel. The issue occurs due to a lack of proper validation of dynamic pointers within user-supplied eBPF programs prior to executing them. This may allow an attacker with CAP_BPF privileges to escalate privileges and execute arbitrary code in the context of the kernel.

HighCVSS 8.2 · v3.1—No exploit Fix available
Published
Oct 4, 2023
Updated
Jun 17, 2026
EPSS
0.5% · 44th percentile

Report tools

JSON

Action score

32

Monitor

Low priority for now.

CVSS
32 / 40 · 8.2 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.5%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
8.2
CNA · redhat
8.2
agree

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

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

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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
fedoraprojectfedora
redhatenterprise linux

Affected versions

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

  • fedoraproject fedora38
  • linux linux kernel5.19 and later · before 6.3
  • redhat enterprise linux9.0

Versions reported by the vendor

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

  • Red Hat Red Hat Enterprise Linux 6

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 7

    • all versionsunknown
    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 8

    • all versionsunknown
    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 9

    • 0:5.14.0-362.8.1.el9_3 and laternot affected · rpm
    • 0:5.14.0-362.8.1.el9_3 and laternot affected · rpm
    • all versionsaffected

  • Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support

    • 0:5.14.0-284.48.1.el9_2 and laternot affected · rpm
    • 0:5.14.0-284.48.1.rt14.333.el9_2 and laternot affected · rpm
    • all versionsunknown

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:13linuxbefore 6.3.7-16.3.7-1
openSUSE:Leap 15.5dtb-aarch64before 5.14.21-150500.55.36.15.14.21-150500.55.36.1
openSUSE:Leap 15.5kernel-64kbbefore 5.14.21-150500.55.36.15.14.21-150500.55.36.1
openSUSE:Leap 15.5kernel-azurebefore 5.14.21-150500.33.23.15.14.21-150500.33.23.1
openSUSE:Leap 15.5kernel-debugbefore 5.14.21-150500.55.36.15.14.21-150500.55.36.1
openSUSE:Leap 15.5kernel-defaultbefore 5.14.21-150500.55.36.15.14.21-150500.55.36.1
openSUSE:Leap 15.5kernel-default-basebefore 5.14.21-150500.55.36.1.150500.6.15.35.14.21-150500.55.36.1.150500.6.15.3
openSUSE:Leap 15.5kernel-docsbefore 5.14.21-150500.55.36.15.14.21-150500.55.36.1
openSUSE:Leap 15.5kernel-kvmsmallbefore 5.14.21-150500.55.36.15.14.21-150500.55.36.1
openSUSE:Leap 15.5kernel-obs-buildbefore 5.14.21-150500.55.36.15.14.21-150500.55.36.1
openSUSE:Leap 15.5kernel-obs-qabefore 5.14.21-150500.55.36.15.14.21-150500.55.36.1
openSUSE:Leap 15.5kernel-rtbefore 5.14.21-150500.13.24.15.14.21-150500.13.24.1
openSUSE:Leap 15.5kernel-rt_debugbefore 5.14.21-150500.13.24.15.14.21-150500.13.24.1
openSUSE:Leap 15.5kernel-sourcebefore 5.14.21-150500.55.36.15.14.21-150500.55.36.1
openSUSE:Leap 15.5kernel-source-azurebefore 5.14.21-150500.33.23.15.14.21-150500.33.23.1
openSUSE:Leap 15.5kernel-source-rtbefore 5.14.21-150500.13.24.15.14.21-150500.13.24.1
openSUSE:Leap 15.5kernel-symsbefore 5.14.21-150500.55.36.15.14.21-150500.55.36.1
openSUSE:Leap 15.5kernel-syms-azurebefore 5.14.21-150500.33.23.15.14.21-150500.33.23.1
openSUSE:Leap 15.5kernel-syms-rtbefore 5.14.21-150500.13.24.15.14.21-150500.13.24.1
openSUSE:Leap 15.5kernel-zfcpdumpbefore 5.14.21-150500.55.36.15.14.21-150500.55.36.1
Red Hat:rhel_eus:9.2::appstreambpftool-debuginfobefore 0:7.0.0-284.48.1.el9_20:7.0.0-284.48.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-64k-debug-debuginfobefore 0:5.14.0-284.48.1.el9_20:5.14.0-284.48.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-64k-debug-develbefore 0:5.14.0-284.48.1.el9_20:5.14.0-284.48.1.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-2023-5345Oct 2, 2023 · Use-after-free in Linux kernel's fs/smb/client component
    31Monitor
  • ← EarlierCVE-2023-4732Oct 3, 2023 · Kernel: race between task migrating pages and another task calling exit_mmap to release those same pages getting invalid opcode bug in include/linux/swapops.h
    18Monitor
  • Later →CVE-2023-42754Oct 5, 2023 · Kernel: ipv4: null pointer dereference in ipv4_send_dest_unreach()
    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
debian:linux6.3.7-1 · Debian:13Package registry (OSV)
opensuse:dtb-aarch645.14.21-150500.55.36.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-64kb5.14.21-150500.55.36.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-debug5.14.21-150500.55.36.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-default5.14.21-150500.55.36.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-default-base5.14.21-150500.55.36.1.150500.6.15.3 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-docs5.14.21-150500.55.36.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-kvmsmall5.14.21-150500.55.36.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-obs-build5.14.21-150500.55.36.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-rt5.14.21-150500.13.24.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-rt_debug5.14.21-150500.13.24.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-source-rt5.14.21-150500.13.24.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-syms-rt5.14.21-150500.13.24.1 · openSUSE:Leap 15.5Package registry (OSV)
red hat:kpatch-patch-5_14_0-284_18_10:1-6.el9_2 · Red Hat:rhel_eus:9.2::baseosPackage registry (OSV)
red hat:kpatch-patch-5_14_0-284_18_1-debuginfo0:1-6.el9_2 · Red Hat:rhel_eus:9.2::baseosPackage registry (OSV)
red hat:kpatch-patch-5_14_0-284_18_1-debugsource0:1-6.el9_2 · Red Hat:rhel_eus:9.2::baseosPackage registry (OSV)
red hat:kpatch-patch-5_14_0-284_25_10:1-5.el9_2 · Red Hat:rhel_eus:9.2::baseosPackage registry (OSV)
red hat:kpatch-patch-5_14_0-284_25_1-debuginfo0:1-5.el9_2 · Red Hat:rhel_eus:9.2::baseosPackage registry (OSV)
red hat:kpatch-patch-5_14_0-284_25_1-debugsource0:1-5.el9_2 · Red Hat:rhel_eus:9.2::baseosPackage registry (OSV)
red hat:kpatch-patch-5_14_0-284_30_10:1-2.el9_2 · Red Hat:rhel_eus:9.2::baseosPackage registry (OSV)
red hat:kpatch-patch-5_14_0-284_30_1-debuginfo0:1-2.el9_2 · Red Hat:rhel_eus:9.2::baseosPackage registry (OSV)
red hat:kpatch-patch-5_14_0-284_30_1-debugsource0:1-2.el9_2 · Red Hat:rhel_eus:9.2::baseosPackage registry (OSV)
red hat:kpatch-patch-5_14_0-284_40_10:1-1.el9_2 · Red Hat:rhel_eus:9.2::baseosPackage registry (OSV)
red hat:kpatch-patch-5_14_0-284_40_1-debuginfo0:1-1.el9_2 · Red Hat:rhel_eus:9.2::baseosPackage registry (OSV)
red hat:kpatch-patch-5_14_0-284_40_1-debugsource0:1-1.el9_2 · Red Hat:rhel_eus:9.2::baseosPackage registry (OSV)
suse:kernel-64kb5.14.21-150500.55.36.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP5Package registry (OSV)
suse:kernel-default5.14.21-150500.55.36.1 · SUSE:Linux Enterprise Micro 5.5Package registry (OSV)
suse:kernel-default-base5.14.21-150500.55.36.1.150500.6.15.3 · SUSE:Linux Enterprise Micro 5.5Package registry (OSV)
suse:kernel-docs5.14.21-150500.55.36.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP5Package registry (OSV)
suse:kernel-livepatch-SLE15-SP5-RT_Update_71-150500.11.3.1 · SUSE:Linux Enterprise Live Patching 15 SP5Package registry (OSV)

+7

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

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

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.

—

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.
  • Administrator privileges are required.
  • 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

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Local
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Changed
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-20 · Improper Input Validation

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/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.

Change log

  1. Fix✗ → ✓

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

References

Show all references (6 more)

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

All records