Linux Kernel up to 6.19.9/7.0-rc4 ipv6 __in6_dev_get null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.19.9/7.0-rc4. It has been rated as critical. Affected is the function __in6_dev_get of the component ipv6. The manipulation leads to null pointer dereference. This vulnerability is referenced as CVE-2026-23442. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.19.9/7.0-rc4 and classified as critical. This issue affects the function __in6_dev_get of the component ipv6. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: ipv6: add NULL checks for idev in SRv6 paths __in6_dev_get() can return NULL when the device has no IPv6 configuration (e.g. MTU < IPV6_MIN_MTU or after NETDEV_UNREGISTER). Add NULL checks for idev returned by __in6_dev_get() in both seg6_hmac_validate_skb() and ipv6_srh_rcv() to prevent potential NULL pointer dereferences.

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2026-23442 since 01/13/2026. Technical details are known, but no exploit is available.

Upgrading to version 6.19.10 or 7.0-rc5 eliminates this vulnerability. Applying the patch a25853c9feea7bbf31d157ff6e004d2d3b4f7f13/06413793526251870e20402c39930804f14d59c0 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.19.10/7.0-rc5
Patch: a25853c9feea7bbf31d157ff6e004d2d3b4f7f13/06413793526251870e20402c39930804f14d59c0

Timelineinfo

01/13/2026 CVE reserved
04/03/2026 +79 days Advisory disclosed
04/03/2026 +0 days VulDB entry created
04/03/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-23442 (🔒)
GCVE (CVE): GCVE-0-2026-23442
GCVE (VulDB): GCVE-100-355145

Entryinfo

Created: 04/03/2026 18:13
Changes: 04/03/2026 18:13 (59)
Complete: 🔍
Cache ID: 216:A12:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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