8.2

CVE-2023-53705: ipv6: Fix out-of-bounds access in ipv6_find_tlv()

Deferred
AliasesUBUNTU-CVE-2023-53705DEBIAN-CVE-2023-53705
Published 22-10-2025Last modified 15-10-2026

Vulnerability summary

CVE-2023-53705 is a high (CVSS 8.2) vulnerability in linux. EPSS estimates a 0.56% chance of exploitation in the next 30 days, higher than 46.9% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 8.2 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
8.2/10
010
High · v3.1 (CVE.org)
EPSS score
0.56%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 20 · Related 8
RHSA-2023:6583RHSA-2024:3138RHSA-2026:0532RHSA-2026:0533RHSA-2026:0537RHSA-2026:0576

Timeline

  1. 22-10-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.56%

Chance of exploitation in the next 30 days

Percentile

47%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.56% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu122 products
  • linuxAll versions (No fix recorded) | < 5.4.0-162.179 | < 5.15.0-83.92
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1109.118 | < 5.15.0-1044.49
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.37-1 | < 6.3.7-1
Linux1 product
  • linux≥ c61a404325093250b676f40ad8f4dd00f3bcab5f, < 59e656d0d4a84ea0ee9a39c6f69160a3effccc94 | ≥ c61a404325093250b676f40ad8f4dd00f3bcab5f, < 04bf69e3de435d793a203aacc4b774f8f9f2baeb | ≥ c61a404325093250b676f40ad8f4dd00f3bcab5f, < 011f47c8b8389154f996f5f69da8efc3a3beefef | ≥ c61a404325093250b676f40ad8f4dd00f3bcab5f, < e5f82688ae10f5f386952e65e941bb8868ee54dc | ≥ c61a404325093250b676f40ad8f4dd00f3bcab5f, < 9b92e2d0eb696d7586ba832c8854653b59887da0 | ≥ c61a404325093250b676f40ad8f4dd00f3bcab5f, < 91dd8aab9c9f193210681b86b6b92840ffe74f0c | ≥ c61a404325093250b676f40ad8f4dd00f3bcab5f, < ae68c0f7edbc9a294094ce03a0aaf45aa489ce40 | ≥ c61a404325093250b676f40ad8f4dd00f3bcab5f, < 878ecb0897f4737a4c9401f3523fd49589025671 | 2.6.19

3 vendors · 124 products

References

12 links
Show all 12 references