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CVE-2026-43101

ipv6: ioam: fix potential NULL dereferences in __ioam6_fill_trace_data()

HIGH
7.5
CVSS Score
Published: May 6, 2026 at 07:40 AM UTC
Updated: October 21, 2026 at 01:18 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.5
Exploit prediction
EPSS 0.5%

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.

Affected

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

Linux Kernel· Linux
95%
5.15 ≤ v < 6.18.246.19 ≤ v < 6.19.145.157.07.0 rc17.0 rc27.0 rc37.0 rc47.0 rc57.0 rc67.0 rc79ee11f0fff205b4b3df9750bff5e94f97c71b6a0
Vendor states this is fixed in 3719c234fa94c37c955b1ecd3742ef280ec135e6 (fixed)
Vendor states this is fixed in 4198aab6f000b4febb18ea820fea20634dd789c7 (fixed)
Vendor states this is fixed in 4e65a8b8daa18d63255ec58964dd192c7fdd9f8b (fixed)
Vendor states this is fixed in 5.15 (unaffected)
Vendor states this is fixed in 6.12.114 (unaffected)
Vendor states this is fixed in 6.18.24 (unaffected)
Vendor states this is fixed in 6.19.14 (unaffected)
Vendor states this is fixed in 6.6.160 (unaffected)
Vendor states this is fixed in 7.0 (unaffected)

References (5)

Patch
Source: cverecord
https://git.kernel.org/stable/c/4198aab6f000b4febb18ea820fea20634dd789c7
Patch
Source: cverecord
https://git.kernel.org/stable/c/3719c234fa94c37c955b1ecd3742ef280ec135e6
Patch
Source: cverecord
https://git.kernel.org/stable/c/4e65a8b8daa18d63255ec58964dd192c7fdd9f8b
Source: cverecord
https://git.kernel.org/stable/c/34b8390ac0ba57004b90ea568ac06f50bf896a80
Source: cverecord
https://git.kernel.org/stable/c/f87aa5d1a7f56727a768757613a303b4245444a1

CVSS

7.5HIGHLinux
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-476

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