Riskcovery

CVE-2025-68353

net: vxlan: prevent NULL deref in vxlan_xmit_one

State
Published
Severity
Not scored
Published
Dec 24, 2025
Updated
Oct 21, 2026
Reserved
Dec 16, 2025

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

net: vxlan: prevent NULL deref in vxlan_xmit_one

Neither sock4 nor sock6 pointers are guaranteed to be non-NULL in vxlan_xmit_one, e.g. if the iface is brought down. This can lead to the following NULL dereference:

BUG: kernel NULL pointer dereference, address: 0000000000000010 Oops: Oops: 0000 [#1] SMP NOPTI RIP: 0010:vxlan_xmit_one+0xbb3/0x1580 Call Trace: vxlan_xmit+0x429/0x610 dev_hard_start_xmit+0x55/0xa0 __dev_queue_xmit+0x6d0/0x7f0 ip_finish_output2+0x24b/0x590 ip_output+0x63/0x110

Mentioned commits changed the code path in vxlan_xmit_one and as a side effect the sock4/6 pointer validity checks in vxlan(6)_get_route were lost. Fix this by adding back checks.

Since both commits being fixed were released in the same version (v6.7) and are strongly related, bundle the fixes in a single commit.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 6f19b2c136d98a84d79030b53e23d405edfdc783 to before 333deb6b43c11d5bce00463b364ac993d2fa02a6Affected
  • 6f19b2c136d98a84d79030b53e23d405edfdc783 to before 4ac26aafdc8c7271414e2e7c0b2cb266a26591bcAffected
  • 6f19b2c136d98a84d79030b53e23d405edfdc783 to before 1f73a56f986005f0bc64ed23873930e2ee4f5911Affected
LinuxLinux
  • 6.7Affected
  • before 6.7Not affected
  • 6.12.114 through 6.12.*Not affected
  • 6.18.2 through 6.18.*Not affected
  • 6.19 and laterNot affected

References

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