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NVD / CVE Program· CNA Linux

CVE-2023-53304: netfilter: nft_set_rbtree: fix overlap expiration walk

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.16% (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 5.10.190, 5.15.124, 50cbb9d195c197af671869c8cadce3bd483735a0.

Low priority for now. Upgrade to Linux Linux 5.10.190, 5.15.124, 50cbb9d195c197af671869c8cadce3bd483735a0 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: netfilter: nft_set_rbtree: fix overlap expiration walk The lazy gc on insert that should remove timed-out entries fails to release the other half of the interval, if any. Can be reproduced with tests/shell/testcases/sets/0044interval_overlap_0 in nftables.git and kmemleak enabled kernel. Second bug is the use of rbe_prev vs. prev pointer. If rbe_prev() returns NULL after at least one iteration, rbe_prev points to element that is not an end interval, hence it should not be removed. Lastly, check the genmask of the end interval if this is active in the current generation.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Sep 16, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 5th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 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.

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When you'll hear from us

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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

Affected versions

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

  • linux linux kernel5.10.166 and later · before 5.10.190
  • linux linux kernel5.15.91 and later · before 5.15.124
  • linux linux kernel6.1.9 and later · before 6.1.43
  • linux linux kernel6.2.1 and later · before 6.4.8
  • linux linux kernel6.2
  • linux linux kernel6.5

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

    • 6.2affected
    • 7ab87a326f20c52ff4d9972052d085be951c704b and later · before 8284a79136c384059e85e278da2210b809730287affected · git
    • 181859bdfb9734aca449512fccaee4cacce64aed and later · before acaee227cf79c45a5d2d49c3e9a66333a462802caffected · git
    • 4aacf3d78424293e318c616016865380b37b9cc5 and later · before 893cb3c3513cf661a0ff45fe0cfa83fe27131f76affected · git
    • 2bf1435fa19d2c58054391b3bba40d5510a5758c and later · before 50cbb9d195c197af671869c8cadce3bd483735a0affected · git
    • 318cb24a4c3fce8140afaf84e4d45fcb76fb280b and later · before 89a4d1a89751a0fbd520e64091873e19cc0979e8affected · git
    • c9e6978e2725a7d4b6cd23b2facd3f11422c0643 and later · before cd66733932399475fe933cb3ec03e687ed401462affected · git
    • c9e6978e2725a7d4b6cd23b2facd3f11422c0643 and later · before f718863aca469a109895cb855e6b81fff4827d71affected · git
    • 5.10.166 and later · before 5.10.190affected · semver
    • 5.15.91 and later · before 5.15.124affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.52-16.1.52-1
Debian:13linuxbefore 6.4.11-16.4.11-1
Red Hat:rhel_eus:9.0::appstreambpftool-debuginfobefore 0:5.14.0-70.101.1.el9_00:5.14.0-70.101.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-debug-debuginfobefore 0:5.14.0-70.101.1.el9_00:5.14.0-70.101.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-debug-develbefore 0:5.14.0-70.101.1.el9_00:5.14.0-70.101.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-debug-devel-matchedbefore 0:5.14.0-70.101.1.el9_00:5.14.0-70.101.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-debuginfobefore 0:5.14.0-70.101.1.el9_00:5.14.0-70.101.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-debuginfo-common-aarch64before 0:5.14.0-70.101.1.el9_00:5.14.0-70.101.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-debuginfo-common-ppc64lebefore 0:5.14.0-70.101.1.el9_00:5.14.0-70.101.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-debuginfo-common-s390xbefore 0:5.14.0-70.101.1.el9_00:5.14.0-70.101.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-debuginfo-common-x86_64before 0:5.14.0-70.101.1.el9_00:5.14.0-70.101.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-develbefore 0:5.14.0-70.101.1.el9_00:5.14.0-70.101.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-devel-matchedbefore 0:5.14.0-70.101.1.el9_00:5.14.0-70.101.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-docbefore 0:5.14.0-70.101.1.el9_00:5.14.0-70.101.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-tools-debuginfobefore 0:5.14.0-70.101.1.el9_00:5.14.0-70.101.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-zfcpdump-debuginfobefore 0:5.14.0-70.101.1.el9_00:5.14.0-70.101.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-zfcpdump-develbefore 0:5.14.0-70.101.1.el9_00:5.14.0-70.101.1.el9_0
Red Hat:rhel_eus:9.0::appstreamkernel-zfcpdump-devel-matchedbefore 0:5.14.0-70.101.1.el9_00:5.14.0-70.101.1.el9_0
Red Hat:rhel_eus:9.0::appstreamperfbefore 0:5.14.0-70.101.1.el9_00:5.14.0-70.101.1.el9_0
Red Hat:rhel_eus:9.0::appstreamperf-debuginfobefore 0:5.14.0-70.101.1.el9_00:5.14.0-70.101.1.el9_0
Red Hat:rhel_eus:9.0::appstreampython3-perf-debuginfobefore 0:5.14.0-70.101.1.el9_00:5.14.0-70.101.1.el9_0
Red Hat:rhel_eus:9.0::baseosbpftoolbefore 0:5.14.0-70.101.1.el9_00:5.14.0-70.101.1.el9_0
Red Hat:rhel_eus:9.0::baseoskernelbefore 0:5.14.0-70.101.1.el9_00:5.14.0-70.101.1.el9_0
Red Hat:rhel_eus:9.0::baseoskernel-abi-stablelistsbefore 0:5.14.0-70.101.1.el9_00:5.14.0-70.101.1.el9_0

+15

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-2022-50351Sep 16, 2025 · cifs: Fix xid leak in cifs_create()
    22Monitor
  • ← EarlierCVE-2022-50352Sep 16, 2025 · net: hns: fix possible memory leak in hnae_ae_register()
    22Monitor
  • Later →CVE-2023-53305Sep 16, 2025 · Bluetooth: L2CAP: Fix use-after-free
    31Monitor

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 Linux5.10.190Vendor (CNA)
Linux Linux5.15.124Vendor (CNA)
Linux Linux50cbb9d195c197af671869c8cadce3bd483735a0Vendor (CNA)
Linux Linux6.1.43Vendor (CNA)
Linux Linux8284a79136c384059e85e278da2210b809730287Vendor (CNA)
Linux Linux893cb3c3513cf661a0ff45fe0cfa83fe27131f76Vendor (CNA)
Linux Linux89a4d1a89751a0fbd520e64091873e19cc0979e8Vendor (CNA)
Linux Linuxacaee227cf79c45a5d2d49c3e9a66333a462802cVendor (CNA)
Linux Linuxcd66733932399475fe933cb3ec03e687ed401462Vendor (CNA)
Linux Linuxf718863aca469a109895cb855e6b81fff4827d71Vendor (CNA)
debian:linux6.1.52-1 · Debian:12Package registry (OSV)
red hat:bpftool-debuginfo0:5.14.0-70.101.1.el9_0 · Red Hat:rhel_eus:9.0::appstreamPackage registry (OSV)
red hat:kernel-debug-debuginfo0:5.14.0-70.101.1.el9_0 · Red Hat:rhel_eus:9.0::appstreamPackage registry (OSV)
red hat:kernel-debug-devel0:5.14.0-70.101.1.el9_0 · Red Hat:rhel_eus:9.0::appstreamPackage registry (OSV)
red hat:kernel-debug-devel-matched0:5.14.0-70.101.1.el9_0 · Red Hat:rhel_eus:9.0::appstreamPackage registry (OSV)
red hat:kernel-debuginfo0:5.14.0-70.101.1.el9_0 · Red Hat:rhel_eus:9.0::appstreamPackage registry (OSV)
red hat:kernel-debuginfo-common-aarch640:5.14.0-70.101.1.el9_0 · Red Hat:rhel_eus:9.0::appstreamPackage registry (OSV)
red hat:kernel-debuginfo-common-ppc64le0:5.14.0-70.101.1.el9_0 · Red Hat:rhel_eus:9.0::appstreamPackage registry (OSV)
red hat:kernel-debuginfo-common-s390x0:5.14.0-70.101.1.el9_0 · Red Hat:rhel_eus:9.0::appstreamPackage registry (OSV)
red hat:kernel-debuginfo-common-x86_640:5.14.0-70.101.1.el9_0 · Red Hat:rhel_eus:9.0::appstreamPackage registry (OSV)
red hat:kernel-devel0:5.14.0-70.101.1.el9_0 · Red Hat:rhel_eus:9.0::appstreamPackage registry (OSV)
red hat:kernel-devel-matched0:5.14.0-70.101.1.el9_0 · Red Hat:rhel_eus:9.0::appstreamPackage registry (OSV)
red hat:kernel-doc0:5.14.0-70.101.1.el9_0 · Red Hat:rhel_eus:9.0::appstreamPackage 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.

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.

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).

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

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

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

MITRE has no CAPEC/ATT&CK mapping for this CWE.

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