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CVE-2023-53705

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

HIGH
8.2
CVSS Score
Published: October 22, 2025 at 01:23 PM UTC
Updated: October 28, 2026 at 07:10 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH8.2
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
90%
2.6.19c61a404325093250b676f40ad8f4dd00f3bcab5f
Vendor states this is fixed in 011f47c8b8389154f996f5f69da8efc3a3beefef (fixed)
Vendor states this is fixed in 04bf69e3de435d793a203aacc4b774f8f9f2baeb (fixed)
Vendor states this is fixed in 59e656d0d4a84ea0ee9a39c6f69160a3effccc94 (fixed)
Vendor states this is fixed in 878ecb0897f4737a4c9401f3523fd49589025671 (fixed)
Vendor states this is fixed in 91dd8aab9c9f193210681b86b6b92840ffe74f0c (fixed)
Vendor states this is fixed in 9b92e2d0eb696d7586ba832c8854653b59887da0 (fixed)
Vendor states this is fixed in ae68c0f7edbc9a294094ce03a0aaf45aa489ce40 (fixed)
Vendor states this is fixed in e5f82688ae10f5f386952e65e941bb8868ee54dc (fixed)
Vendor states this is fixed in 2.6.19 (unaffected)
Vendor states this is fixed in 4.14.316 (unaffected)
Vendor states this is fixed in 4.19.284 (unaffected)
Vendor states this is fixed in 5.10.181 (unaffected)
Vendor states this is fixed in 5.15.114 (unaffected)
Vendor states this is fixed in 5.4.244 (unaffected)
Vendor states this is fixed in 6.1.31 (unaffected)
Vendor states this is fixed in 6.3.5 (unaffected)
Vendor states this is fixed in 6.4 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (8)

Source: cverecord
https://git.kernel.org/stable/c/59e656d0d4a84ea0ee9a39c6f69160a3effccc94
Source: cverecord
https://git.kernel.org/stable/c/04bf69e3de435d793a203aacc4b774f8f9f2baeb
Source: cverecord
https://git.kernel.org/stable/c/011f47c8b8389154f996f5f69da8efc3a3beefef
Source: cverecord
https://git.kernel.org/stable/c/e5f82688ae10f5f386952e65e941bb8868ee54dc
Source: cverecord
https://git.kernel.org/stable/c/9b92e2d0eb696d7586ba832c8854653b59887da0
Source: cverecord
https://git.kernel.org/stable/c/91dd8aab9c9f193210681b86b6b92840ffe74f0c
Source: cverecord
https://git.kernel.org/stable/c/ae68c0f7edbc9a294094ce03a0aaf45aa489ce40
Source: cverecord
https://git.kernel.org/stable/c/878ecb0897f4737a4c9401f3523fd49589025671

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.2HIGHLinux
Vector?

Quick Info

StatusDEFERRED

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