UnratedFix available
ipv6: add NULL checks for idev in SRv6 paths
Type: advisorySources: OSV
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.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.258, 5.15.209, 6.1.175, 6.12.83, 6.18.25, 6.19.10, 6.6.136
- CVEs
- CVE-2026-23442
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 11:23 UTC · Revision 1
Source evidence
ipv6: add NULL checks for idev in SRv6 paths
core-osv · Original sourcePublished 3 Apr 2026, 15:15 UTC
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.
osv:CVE-2026-23442
Kernel
Fixed versions: 5.10.258, 5.15.209, 6.1.175, 6.6.136, 6.12.83, 6.18.25, 6.19.10
Complete source record
{
"id": "b55bd8227111cdf47a8f8bbc963a86f770e20dca620d283bc238c9f82ad73922",
"url": "https://osv.dev/vulnerability/CVE-2026-23442",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ipv6: add NULL checks for idev in SRv6 paths",
"summary": "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.",
"evidence": "osv:CVE-2026-23442",
"products": [
{
"name": {
"value": "Kernel",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
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"value": "5.10.258",
"evidence": "/affected/1/ranges"
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{
"value": "5.15.209",
"evidence": "/affected/1/ranges"
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{
"value": "6.1.175",
"evidence": "/affected/1/ranges"
},
{
"value": "6.6.136",
"evidence": "/affected/1/ranges"
},
{
"value": "6.12.83",
"evidence": "/affected/1/ranges"
},
{
"value": "6.18.25",
"evidence": "/affected/1/ranges"
},
{
"value": "6.19.10",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CVE-2026-23442",
"aliases": [
"CVE-2026-23442"
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"affected": [
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
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{
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{
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{
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}
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}
],
"database_specific": {
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}
},
{
"ranges": [
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"type": "ECOSYSTEM",
"events": [
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{
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"events": [
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{
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"events": [
{
"introduced": "6.2.0"
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{
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},
{
"type": "ECOSYSTEM",
"events": [
{
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{
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]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.13.0"
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{
"fixed": "6.18.25"
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},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.19.0"
},
{
"fixed": "6.19.10"
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]
}
],
"package": {
"name": "Kernel",
"ecosystem": "Linux"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23442.json"
}
}
],
"modified": "2026-10-28T02:30:50.608920591Z",
"provider": "osv",
"references": [
"https://cert-portal.siemens.com/productcert/html/ssa-784472.html",
"https://git.kernel.org/stable/c/0348fa0ada37cef7c6b5ab2a428bb2c6aee784e4",
"https://git.kernel.org/stable/c/06413793526251870e20402c39930804f14d59c0",
"https://git.kernel.org/stable/c/50352fc103928e10e8729abc79a0d05abef26c4d",
"https://git.kernel.org/stable/c/83d705d35e583cb1b1eacf196dfe7b77d442018e",
"https://git.kernel.org/stable/c/a25853c9feea7bbf31d157ff6e004d2d3b4f7f13",
"https://git.kernel.org/stable/c/bc9843c39f9932a8b36efd1d362ea00bb88e4e78",
"https://git.kernel.org/stable/c/c5cedee5d97382176573bbe21e1724e737a5eb64",
"https://git.kernel.org/stable/c/d1bd8b9edc6752d10f84d28ff64f842401ce336d",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23442.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-23442",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
],
"provider_metadata": {
"cna_assigner": "Linux",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23442.json"
}
},
"related_cves": [
{
"value": "CVE-2026-23442",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 519120,
"published_at": "2026-04-03T15:15:26.851+00:00"
}