CVE-2023-53705
Published Oct 22, 2025
Modified Apr 15, 2026
Description
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.
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References
Other References
https://git.kernel.org/stable/c/011f47c8b8389154f996f5f69da8efc3a3beefef
https://git.kernel.org/stable/c/04bf69e3de435d793a203aacc4b774f8f9f2baeb
https://git.kernel.org/stable/c/59e656d0d4a84ea0ee9a39c6f69160a3effccc94
https://git.kernel.org/stable/c/878ecb0897f4737a4c9401f3523fd49589025671
https://git.kernel.org/stable/c/91dd8aab9c9f193210681b86b6b92840ffe74f0c
https://git.kernel.org/stable/c/9b92e2d0eb696d7586ba832c8854653b59887da0
https://git.kernel.org/stable/c/ae68c0f7edbc9a294094ce03a0aaf45aa489ce40
https://git.kernel.org/stable/c/e5f82688ae10f5f386952e65e941bb8868ee54dc
Frequently Asked Questions
What is CVE-2023-53705? +
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.
How do I check if I'm vulnerable to CVE-2023-53705? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.