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CVE-2023-53705· NVD / CVE Program· CNA Linux

ipv6: Fix out-of-bounds access in ipv6_find_tlv()

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: 0.56% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 011f47c8b8389154f996f5f69da8efc3a3beefef, 04bf69e3de435d793a203aacc4b774f8f9f2baeb, 59e656d0d4a84ea0ee9a39c6f69160a3effccc94.

Low priority for now. Upgrade to Linux Linux 011f47c8b8389154f996f5f69da8efc3a3beefef, 04bf69e3de435d793a203aacc4b774f8f9f2baeb, 59e656d0d4a84ea0ee9a39c6f69160a3effccc94 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

In the Linux kernel, the following vulnerability has been resolved: ipv6: Fix out-of-bounds access in ipv6_find_tlv() optlen is fetched without checking whether there is more than one byte to parse. It can lead to out-of-bounds access. Found by InfoTeCS on behalf of Linux Verification Center (linuxtesting.org) with SVACE.

HighCVSS 8.2 · v3.1—No exploit Fix available
Published
Oct 22, 2025
Updated
Aug 5, 2026
EPSS
0.6% · 45th percentile
CWE
—

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 · 0.6%

CNA vs NVD score

NVD
—
CNA · Linux
8.2
NVD has not scored this yet; the score shown is the CNA’s.

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.

Follow CVE-2023-53705

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.

—

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

    • 2.6.19affected
    • c61a404325093250b676f40ad8f4dd00f3bcab5f and later · before 59e656d0d4a84ea0ee9a39c6f69160a3effccc94affected · git
    • c61a404325093250b676f40ad8f4dd00f3bcab5f and later · before 04bf69e3de435d793a203aacc4b774f8f9f2baebaffected · git
    • c61a404325093250b676f40ad8f4dd00f3bcab5f and later · before 011f47c8b8389154f996f5f69da8efc3a3beefefaffected · git
    • c61a404325093250b676f40ad8f4dd00f3bcab5f and later · before e5f82688ae10f5f386952e65e941bb8868ee54dcaffected · git
    • c61a404325093250b676f40ad8f4dd00f3bcab5f and later · before 9b92e2d0eb696d7586ba832c8854653b59887da0affected · git
    • c61a404325093250b676f40ad8f4dd00f3bcab5f and later · before 91dd8aab9c9f193210681b86b6b92840ffe74f0caffected · git
    • c61a404325093250b676f40ad8f4dd00f3bcab5f and later · before ae68c0f7edbc9a294094ce03a0aaf45aa489ce40affected · git
    • c61a404325093250b676f40ad8f4dd00f3bcab5f and later · before 878ecb0897f4737a4c9401f3523fd49589025671affected · git
    • before 2.6.19not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.37-16.1.37-1
Debian:13linuxbefore 6.3.7-16.3.7-1
Red Hat:rhel_aus:8.2::baseosbpftoolbefore 0:4.18.0-193.183.1.el8_20:4.18.0-193.183.1.el8_2
Red Hat:rhel_aus:8.2::baseosbpftool-debuginfobefore 0:4.18.0-193.183.1.el8_20:4.18.0-193.183.1.el8_2
Red Hat:rhel_aus:8.2::baseoskernelbefore 0:4.18.0-193.183.1.el8_20:4.18.0-193.183.1.el8_2
Red Hat:rhel_aus:8.2::baseoskernel-abi-whitelistsbefore 0:4.18.0-193.183.1.el8_20:4.18.0-193.183.1.el8_2
Red Hat:rhel_aus:8.2::baseoskernel-corebefore 0:4.18.0-193.183.1.el8_20:4.18.0-193.183.1.el8_2
Red Hat:rhel_aus:8.2::baseoskernel-debugbefore 0:4.18.0-193.183.1.el8_20:4.18.0-193.183.1.el8_2
Red Hat:rhel_aus:8.2::baseoskernel-debug-corebefore 0:4.18.0-193.183.1.el8_20:4.18.0-193.183.1.el8_2
Red Hat:rhel_aus:8.2::baseoskernel-debug-debuginfobefore 0:4.18.0-193.183.1.el8_20:4.18.0-193.183.1.el8_2
Red Hat:rhel_aus:8.2::baseoskernel-debug-develbefore 0:4.18.0-193.183.1.el8_20:4.18.0-193.183.1.el8_2
Red Hat:rhel_aus:8.2::baseoskernel-debug-modulesbefore 0:4.18.0-193.183.1.el8_20:4.18.0-193.183.1.el8_2
Red Hat:rhel_aus:8.2::baseoskernel-debug-modules-extrabefore 0:4.18.0-193.183.1.el8_20:4.18.0-193.183.1.el8_2
Red Hat:rhel_aus:8.2::baseoskernel-debuginfobefore 0:4.18.0-193.183.1.el8_20:4.18.0-193.183.1.el8_2
Red Hat:rhel_aus:8.2::baseoskernel-debuginfo-common-x86_64before 0:4.18.0-193.183.1.el8_20:4.18.0-193.183.1.el8_2
Red Hat:rhel_aus:8.2::baseoskernel-develbefore 0:4.18.0-193.183.1.el8_20:4.18.0-193.183.1.el8_2
Red Hat:rhel_aus:8.2::baseoskernel-docbefore 0:4.18.0-193.183.1.el8_20:4.18.0-193.183.1.el8_2
Red Hat:rhel_aus:8.2::baseoskernel-modulesbefore 0:4.18.0-193.183.1.el8_20:4.18.0-193.183.1.el8_2
Red Hat:rhel_aus:8.2::baseoskernel-modules-extrabefore 0:4.18.0-193.183.1.el8_20:4.18.0-193.183.1.el8_2
Red Hat:rhel_aus:8.2::baseoskernel-toolsbefore 0:4.18.0-193.183.1.el8_20:4.18.0-193.183.1.el8_2
Red Hat:rhel_aus:8.2::baseoskernel-tools-debuginfobefore 0:4.18.0-193.183.1.el8_20:4.18.0-193.183.1.el8_2
Red Hat:rhel_aus:8.2::baseoskernel-tools-libsbefore 0:4.18.0-193.183.1.el8_20:4.18.0-193.183.1.el8_2
Red Hat:rhel_aus:8.2::baseosperfbefore 0:4.18.0-193.183.1.el8_20:4.18.0-193.183.1.el8_2
Red Hat:rhel_aus:8.2::baseosperf-debuginfobefore 0:4.18.0-193.183.1.el8_20:4.18.0-193.183.1.el8_2

+96

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan
  • CVE-2026-74309vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
    40Plan
  • CVE-2026-74280crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
    40Plan
  • CVE-2026-74279crypto: cavium/cpt - fix DMA cleanup using wrong loop index
    40Plan

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 Linux011f47c8b8389154f996f5f69da8efc3a3beefefVendor (CNA)
Linux Linux04bf69e3de435d793a203aacc4b774f8f9f2baebVendor (CNA)
Linux Linux59e656d0d4a84ea0ee9a39c6f69160a3effccc94Vendor (CNA)
Linux Linux878ecb0897f4737a4c9401f3523fd49589025671Vendor (CNA)
Linux Linux91dd8aab9c9f193210681b86b6b92840ffe74f0cVendor (CNA)
Linux Linux9b92e2d0eb696d7586ba832c8854653b59887da0Vendor (CNA)
Linux Linuxae68c0f7edbc9a294094ce03a0aaf45aa489ce40Vendor (CNA)
Linux Linuxe5f82688ae10f5f386952e65e941bb8868ee54dcVendor (CNA)
debian:linux6.1.37-1 · Debian:12Package registry (OSV)
red hat:bpftool0:4.18.0-477.124.1.el8_8 · Red Hat:rhel_e4s:8.8::baseosPackage registry (OSV)
red hat:bpftool-debuginfo0:4.18.0-477.124.1.el8_8 · Red Hat:rhel_e4s:8.8::baseosPackage registry (OSV)
red hat:kernel0:4.18.0-477.124.1.el8_8 · Red Hat:rhel_e4s:8.8::baseosPackage registry (OSV)
red hat:kernel-abi-stablelists0:4.18.0-477.124.1.el8_8 · Red Hat:rhel_e4s:8.8::baseosPackage registry (OSV)
red hat:kernel-core0:4.18.0-477.124.1.el8_8 · Red Hat:rhel_e4s:8.8::baseosPackage registry (OSV)
red hat:kernel-debug0:4.18.0-477.124.1.el8_8 · Red Hat:rhel_e4s:8.8::baseosPackage registry (OSV)
red hat:kernel-debug-core0:4.18.0-477.124.1.el8_8 · Red Hat:rhel_e4s:8.8::baseosPackage registry (OSV)
red hat:kernel-debug-debuginfo0:4.18.0-477.124.1.el8_8 · Red Hat:rhel_e4s:8.8::baseosPackage registry (OSV)
red hat:kernel-debug-devel0:4.18.0-477.124.1.el8_8 · Red Hat:rhel_e4s:8.8::baseosPackage registry (OSV)
red hat:kernel-debug-modules0:4.18.0-477.124.1.el8_8 · Red Hat:rhel_e4s:8.8::baseosPackage registry (OSV)
red hat:kernel-debug-modules-extra0:4.18.0-477.124.1.el8_8 · Red Hat:rhel_e4s:8.8::baseosPackage registry (OSV)
red hat:kernel-debuginfo0:4.18.0-477.124.1.el8_8 · Red Hat:rhel_e4s:8.8::baseosPackage registry (OSV)
suse:kernel-default3.0.101-108.192.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage registry (OSV)
suse:kernel-docs3.0.101-108.192.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage registry (OSV)
suse:kernel-ec23.0.101-108.192.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage registry (OSV)
suse:kernel-source3.0.101-108.192.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage registry (OSV)
suse:kernel-syms3.0.101-108.192.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage registry (OSV)
suse:kernel-trace3.0.101-108.192.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage registry (OSV)
suse:kernel-xen3.0.101-108.192.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage 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.

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

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

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

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

nvd-secondary

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 (7 more)

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

All records