CVE-2026-23442
Full vulnerability record from the local CVENow database.
Description
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.
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-04-03 16:16:28.423000
Last modified
2026-11-05 22:18:26.490000
View original CVE JSON
{
"id": "CVE-2026-23442",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-04-03T16:16:28.423",
"lastModified": "2026-11-05T22:18:26.490",
"vulnStatus": "Modified",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: add NULL checks for idev in SRv6 paths\n\n__in6_dev_get() can return NULL when the device has no IPv6 configuration\n(e.g. MTU < IPV6_MIN_MTU or after NETDEV_UNREGISTER).\n\nAdd NULL checks for idev returned by __in6_dev_get() in both\nseg6_hmac_validate_skb() and ipv6_srh_rcv() to prevent potential NULL\npointer dereferences."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nipv6: añadir comprobaciones de NULL para idev en las rutas SRv6\n\n__in6_dev_get() puede devolver NULL cuando el dispositivo no tiene configuración IPv6 (p. ej., MTU < IPV6_MIN_MTU o después de NETDEV_UNREGISTER).\n\nAñadir comprobaciones de NULL para idev devuelto por __in6_dev_get() tanto en seg6_hmac_validate_skb() como en ipv6_srh_rcv() para prevenir posibles desreferencias de puntero NULL."
}
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"product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
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"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
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"id": "CVE-2026-23442",
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