Linux Kernel up to 6.3.4 ipv6 ipv6_find_tlv out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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3.4$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.3.4. Affected by this issue is the function ipv6_find_tlv of the component ipv6. The manipulation leads to out-of-bounds. This vulnerability is listed as CVE-2023-53705. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.3.4. It has been rated as problematic. This issue affects the function ipv6_find_tlv of the component ipv6. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2023-53705 since 10/22/2025. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 276910 (SUSE SLES12 Security Update : kernel (SUSE-SU-2025:4189-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.14.316, 4.19.284, 5.4.244, 5.10.181, 5.15.114, 6.1.31 or 6.3.5 eliminates this vulnerability. Applying the patch 59e656d0d4a84ea0ee9a39c6f69160a3effccc94/04bf69e3de435d793a203aacc4b774f8f9f2baeb/011f47c8b8389154f996f5f69da8efc3a3beefef/e5f82688ae10f5f386952e65e941bb8868ee54dc/9b92e2d0eb696d7586ba832c8854653b59887da0/91dd8aab9c9f193210681b86b6b92840ffe74f0c/ae68c0f7edbc9a294094ce03a0aaf45aa489ce40/878ecb0897f4737a4c9401f3523fd49589025671 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (276910) and CERT Bund (WID-SEC-2025-2394). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • Red Hat Enterprise Linux
  • SUSE Linux
  • Oracle Linux
  • Open Source Linux Kernel
  • Dell NetWorker

Productinfo

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Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 276910
Nessus Name: SUSE SLES12 Security Update : kernel (SUSE-SU-2025:4189-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 4.14.316/4.19.284/5.4.244/5.10.181/5.15.114/6.1.31/6.3.5
Patch: 59e656d0d4a84ea0ee9a39c6f69160a3effccc94/04bf69e3de435d793a203aacc4b774f8f9f2baeb/011f47c8b8389154f996f5f69da8efc3a3beefef/e5f82688ae10f5f386952e65e941bb8868ee54dc/9b92e2d0eb696d7586ba832c8854653b59887da0/91dd8aab9c9f193210681b86b6b92840ffe74f0c/ae68c0f7edbc9a294094ce03a0aaf45aa489ce40/878ecb0897f4737a4c9401f3523fd49589025671

Timelineinfo

10/22/2025 Advisory disclosed
10/22/2025 +0 days CVE reserved
10/22/2025 +0 days VulDB entry created
02/28/2026 +129 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-53705 (🔒)
GCVE (CVE): GCVE-0-2023-53705
GCVE (VulDB): GCVE-100-329363
CERT Bund: WID-SEC-2025-2394 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 10/22/2025 17:51
Updated: 02/28/2026 09:02
Changes: 10/22/2025 17:51 (59), 10/24/2025 09:30 (7), 11/28/2025 02:28 (2), 01/02/2026 06:11 (1), 02/28/2026 09:02 (1)
Complete: 🔍
Cache ID: 216::103

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