Kernel: netfilter: potential slab-out-of-bound access due to integer underflow
An array indexing vulnerability was found in the netfilter subsystem of the Linux kernel. A missing macro could lead to a miscalculation of the `h->nets` array offset, providing attackers with the primitive to arbitrarily increment/decrement a memory buffer out-of-bound. This issue may allow a local user to crash the system or potentially escalate their privileges on the system.
- BDU:2023-06160
- ALSA-2024:0113
- openSUSE-SU-2024:13305-1
- RHSA-2023:7370
- RHSA-2023:7379
- RHSA-2023:7382
- RHSA-2023:7389
- RHSA-2023:7411
- RHSA-2023:7418
- RHSA-2023:7539
- RHSA-2023:7558
- RHSA-2024:0089
- RHSA-2024:0113
- RHSA-2024:0134
- RHSA-2024:0340
- RHSA-2024:0346
- RHSA-2024:0347
- RHSA-2024:0371
- RHSA-2024:0376
- RHSA-2024:0378
- Published
- Sep 25, 2023
- Updated
- Aug 6, 2026
- EPSS
- 0.5% · 41th percentile
- CWE
- CWE-787
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Report tools
Action score
31
Monitor
Low priority for now.
- CVSS
- 31 / 40 · 7.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.5%
CISA SSVC decision
- Exploitation
- proof of concept
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 7.8
- CNA · redhat
- 7.0
- 0.8 point gap
CVSS:3.1/AV:L/AC:H/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.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
| redhat | enterprise linux | cpe:2.3:o:redhat:enterprise_linux |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- debian debian linux10.0
- linux linux kernel4.9.141 and later · before 4.10
- linux linux kernel4.14.84 and later · before 4.15
- linux linux kernel4.19.5 and later · before 4.19.295
- linux linux kernel4.20 and later · before 5.4.257
- linux linux kernel5.5 and later · before 5.10.195
- linux linux kernel5.11 and later · before 5.15.132
- linux linux kernel4.4.165 and later · before 4.5
- linux linux kernel6.2 and later · before 6.4.16
- linux linux kernel6.5 and later · before 6.5.3
- linux linux kernel5.16 and later · before 6.1.53
- redhat enterprise linux7.0
- redhat enterprise linux8.0
- 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
- 0:3.10.0-1160.108.1.rt56.1259.el7 and laternot affected · rpm
- 0:3.10.0-1160.108.1.el7 and laternot affected · rpm
- all versionsunknown
Red Hat Red Hat Enterprise Linux 7.7 Advanced Update Support
- 0:3.10.0-1062.85.1.el7 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 8
- 0:4.18.0-513.11.1.rt7.313.el8_9 and laternot affected · rpm
- all versionsunknown
- 0:4.18.0-513.11.1.el8_9 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support
- 0:4.18.0-193.120.1.el8_2 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 8.2 Telecommunications Update Service
- 0:4.18.0-193.120.1.rt13.171.el8_2 and laternot affected · rpm
- 0:4.18.0-193.120.1.el8_2 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions
- all versionsunknown
- 0:4.18.0-193.120.1.el8_2 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
- 0:4.18.0-305.120.1.el8_4 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service
- 0:4.18.0-305.120.1.rt7.196.el8_4 and laternot affected · rpm
- 0:4.18.0-305.120.1.el8_4 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions
- 0:4.18.0-305.120.1.el8_4 and laternot affected · rpm
- all versionsunknown
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support
- 0:4.18.0-372.87.1.el8_6 and laternot affected · rpm
- all versionsunknown
Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support
- 0:4.18.0-477.36.1.el8_8 and laternot affected · rpm
- all versionsunknown
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:8 | bpftool | before 4.18.0-513.11.1.el8_9 | 4.18.0-513.11.1.el8_9 |
| AlmaLinux:8 | kernel | before 4.18.0-513.11.1.el8_9 | 4.18.0-513.11.1.el8_9 |
| AlmaLinux:8 | kernel-abi-stablelists | before 4.18.0-513.11.1.el8_9 | 4.18.0-513.11.1.el8_9 |
| AlmaLinux:8 | kernel-core | before 4.18.0-513.11.1.el8_9 | 4.18.0-513.11.1.el8_9 |
| AlmaLinux:8 | kernel-cross-headers | before 4.18.0-513.11.1.el8_9 | 4.18.0-513.11.1.el8_9 |
| AlmaLinux:8 | kernel-debug | before 4.18.0-513.11.1.el8_9 | 4.18.0-513.11.1.el8_9 |
| AlmaLinux:8 | kernel-debug-core | before 4.18.0-513.11.1.el8_9 | 4.18.0-513.11.1.el8_9 |
| AlmaLinux:8 | kernel-debug-devel | before 4.18.0-513.11.1.el8_9 | 4.18.0-513.11.1.el8_9 |
| AlmaLinux:8 | kernel-debug-modules | before 4.18.0-513.11.1.el8_9 | 4.18.0-513.11.1.el8_9 |
| AlmaLinux:8 | kernel-debug-modules-extra | before 4.18.0-513.11.1.el8_9 | 4.18.0-513.11.1.el8_9 |
| AlmaLinux:8 | kernel-devel | before 4.18.0-513.11.1.el8_9 | 4.18.0-513.11.1.el8_9 |
| AlmaLinux:8 | kernel-doc | before 4.18.0-513.11.1.el8_9 | 4.18.0-513.11.1.el8_9 |
| AlmaLinux:8 | kernel-modules | before 4.18.0-513.11.1.el8_9 | 4.18.0-513.11.1.el8_9 |
| AlmaLinux:8 | kernel-modules-extra | before 4.18.0-513.11.1.el8_9 | 4.18.0-513.11.1.el8_9 |
| AlmaLinux:8 | kernel-tools | before 4.18.0-513.11.1.el8_9 | 4.18.0-513.11.1.el8_9 |
| AlmaLinux:8 | kernel-tools-libs | before 4.18.0-513.11.1.el8_9 | 4.18.0-513.11.1.el8_9 |
| AlmaLinux:8 | kernel-tools-libs-devel | before 4.18.0-513.11.1.el8_9 | 4.18.0-513.11.1.el8_9 |
| AlmaLinux:8 | kernel-zfcpdump | before 4.18.0-513.11.1.el8_9 | 4.18.0-513.11.1.el8_9 |
| AlmaLinux:8 | kernel-zfcpdump-core | before 4.18.0-513.11.1.el8_9 | 4.18.0-513.11.1.el8_9 |
| AlmaLinux:8 | kernel-zfcpdump-devel | before 4.18.0-513.11.1.el8_9 | 4.18.0-513.11.1.el8_9 |
| AlmaLinux:8 | kernel-zfcpdump-modules | before 4.18.0-513.11.1.el8_9 | 4.18.0-513.11.1.el8_9 |
| AlmaLinux:8 | kernel-zfcpdump-modules-extra | before 4.18.0-513.11.1.el8_9 | 4.18.0-513.11.1.el8_9 |
| AlmaLinux:8 | perf | before 4.18.0-513.11.1.el8_9 | 4.18.0-513.11.1.el8_9 |
| AlmaLinux:8 | python3-perf | before 4.18.0-513.11.1.el8_9 | 4.18.0-513.11.1.el8_9 |
+96
Same product
linux: all recordsOther 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 KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
- 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 haKEV83Now
- CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV77This week
- CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV77This week
- CVE-2013-2094The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows loKEV77This week
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| almalinux:bpftool | 4.18.0-513.11.1.el8_9 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel | 4.18.0-513.11.1.el8_9 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-abi-stablelists | 4.18.0-513.11.1.el8_9 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-core | 4.18.0-513.11.1.el8_9 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-cross-headers | 4.18.0-513.11.1.el8_9 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-debug | 4.18.0-513.11.1.el8_9 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-debug-core | 4.18.0-513.11.1.el8_9 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-debug-devel | 4.18.0-513.11.1.el8_9 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-debug-modules | 4.18.0-513.11.1.el8_9 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-debug-modules-extra | 4.18.0-513.11.1.el8_9 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-devel | 4.18.0-513.11.1.el8_9 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-doc | 4.18.0-513.11.1.el8_9 · AlmaLinux:8 | Package registry (OSV) |
| debian:linux | 6.1.55-1 · Debian:12 | Package registry (OSV) |
| opensuse:kernel-rt | 5.14.21-150500.13.21.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| opensuse:kernel-rt_debug | 5.14.21-150500.13.21.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| opensuse:kernel-source-rt | 5.14.21-150500.13.21.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| opensuse:kernel-syms-rt | 5.14.21-150500.13.21.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| red hat:bpftool-debuginfo | 0:7.0.0-284.40.1.el9_2 · Red Hat:rhel_eus:9.2::appstream | Package registry (OSV) |
| red hat:kernel-64k-debug-debuginfo | 0:5.14.0-284.40.1.el9_2 · Red Hat:rhel_eus:9.2::appstream | Package registry (OSV) |
| red hat:kernel-64k-debug-devel | 0:5.14.0-284.40.1.el9_2 · Red Hat:rhel_eus:9.2::appstream | Package registry (OSV) |
| red hat:kernel-64k-debug-devel-matched | 0:5.14.0-284.40.1.el9_2 · Red Hat:rhel_eus:9.2::appstream | Package registry (OSV) |
| red hat:kernel-64k-debuginfo | 0:5.14.0-284.40.1.el9_2 · Red Hat:rhel_eus:9.2::appstream | Package registry (OSV) |
| red hat:kernel-64k-devel | 0:5.14.0-284.40.1.el9_2 · Red Hat:rhel_eus:9.2::appstream | Package registry (OSV) |
| red hat:kernel-64k-devel-matched | 0:5.14.0-284.40.1.el9_2 · Red Hat:rhel_eus:9.2::appstream | Package registry (OSV) |
| red hat:kernel-debug-debuginfo | 0:5.14.0-284.40.1.el9_2 · Red Hat:rhel_eus:9.2::appstream | Package registry (OSV) |
| red hat:kernel-debug-devel | 0:5.14.0-284.40.1.el9_2 · Red Hat:rhel_eus:9.2::appstream | Package registry (OSV) |
| red hat:kernel-debug-devel-matched | 0:5.14.0-284.40.1.el9_2 · Red Hat:rhel_eus:9.2::appstream | Package registry (OSV) |
| red hat:kernel-debuginfo | 0:5.14.0-284.40.1.el9_2 · Red Hat:rhel_eus:9.2::appstream | Package registry (OSV) |
| red hat:kernel-debuginfo-common-aarch64 | 0:5.14.0-284.40.1.el9_2 · Red Hat:rhel_eus:9.2::appstream | Package registry (OSV) |
| rocky linux:kernel-rt | 0:4.18.0-513.11.1.rt7.313.el8_9 · Rocky Linux:8 | Package registry (OSV) |
+16
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.
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 researchersFinders, 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.
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).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-23-0661 · Nov 24, 2023(RedHat Güvenlik Güncellemesi)
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-787 · Out-of-bounds WriteCVSS 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.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- access.redhat.com/errata/RHSA-2023:7370
- access.redhat.com/errata/RHSA-2023:7379
- access.redhat.com/errata/RHSA-2023:7382
- access.redhat.com/errata/RHSA-2023:7389
- access.redhat.com/errata/RHSA-2023:7411
- access.redhat.com/errata/RHSA-2023:7418
- access.redhat.com/errata/RHSA-2023:7539
- access.redhat.com/errata/RHSA-2023:7558
- access.redhat.com/errata/RHSA-2024:0089
- access.redhat.com/errata/RHSA-2024:0113
- access.redhat.com/errata/RHSA-2024:0134
- access.redhat.com/errata/RHSA-2024:0340
- access.redhat.com/errata/RHSA-2024:0346
- access.redhat.com/errata/RHSA-2024:0347
- access.redhat.com/errata/RHSA-2024:0371
- access.redhat.com/errata/RHSA-2024:0376
- access.redhat.com/errata/RHSA-2024:0378
- access.redhat.com/errata/RHSA-2024:0402
- access.redhat.com/errata/RHSA-2024:0403
- access.redhat.com/errata/RHSA-2024:0412
Vendor advisories and official records. Exploit/PoC links are deliberately left out.