CVE-2026-23442
Low
No strong exploitation signal.
CVSS base
5.5
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS — probability of exploitation (30 days)
0.1%
2.4th percentile
CISA KEV
Not listed
Weakness / dates
CWE-476
Published 2026-04-03 · modified 2026-07-24
CVSS breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
| Attack Vector | L | Local |
| Attack Complexity | L | Low |
| Privileges Required | L | Low |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | N | None |
| Integrity | N | None |
| Availability | H | High |
Timeline
- 2026-04-03 — Published (NVD)
- 2026-07-24 — Last modified (NVD)
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.
Affected
References
- 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