7.5

CVE-2026-43101: linux NULL Pointer Dereference

CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2026-43101DEBIAN-CVE-2026-43101CGA-3cpq-349r-jv8v
Published 06-05-2026Last modified 21-10-2026
Open JSON

Vulnerability summary

CVE-2026-43101 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.61% chance of exploitation in the next 30 days, higher than 48.4% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.61%
0%100%
Low · +0.18 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 12 · Related 13
OPENSUSE-SU-2026:21388-1SUSE-SU-2026:22433-1SUSE-SU-2026:22436-1SUSE-SU-2026:22458-1SUSE-SU-2026:22460-1SUSE-SU-2026:22742-1

Timeline

  1. 06-05-2026
    PublishedVulnerability first disclosed.
  2. 21-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ipv6: ioam: fix potential NULL dereferences in __ioam6_fill_trace_data() We need to check __in6_dev_get() for possible NULL value, as suggested by Yiming Qian. Also add skb_dst_dev_rcu() instead of skb_dst_dev(), and two missing READ_ONCE(). Note that @dev can't be NULL.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.61%

Chance of exploitation in the next 30 days

Percentile

48%

Versus all other CVEs

30-day change

+0.18 pp

From 0.43% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.61%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu147 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Chainguard11 products
  • linux-aws-6.12All versions (No fix recorded)
  • linux-aws-6.18< 6.18.31-r0
  • linux-azure-6.12All versions (No fix recorded)
  • linux-azure-6.18< 6.18.31-r0
  • linux-gcp-6.12All versions (No fix recorded)
Linux2 products
  • linux≥ 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0, < 34b8390ac0ba57004b90ea568ac06f50bf896a80 | ≥ 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0, < f87aa5d1a7f56727a768757613a303b4245444a1 | ≥ 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0, < 4198aab6f000b4febb18ea820fea20634dd789c7 | ≥ 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0, < 3719c234fa94c37c955b1ecd3742ef280ec135e6 | ≥ 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0, < 4e65a8b8daa18d63255ec58964dd192c7fdd9f8b | 5.15
  • linux_kernel≥ 5.15, < 6.18.24 | ≥ 6.19, < 6.19.14 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6 | 7.0:rc7
Debian1 product
  • linuxAll versions (No fix recorded) | < 6.19.14-1

4 vendors · 161 products

References

13 links
Show all 13 references