VulnerabilityPublished 24 Dec 2025Updated 21 Oct 2026

CVE-2025-68353: Linux kernel · net: vxlan: prevent NULL deref in vxlan_xmit_one

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in 333deb6b43c11d5bce00463b364ac993d2fa02a6 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 333deb6b43c11d5bce00463b364ac993d2fa02a6, 4ac26aafdc8c7271414e2e7c0b2cb266a26591bc, 1f73a56f986005f0bc64ed23873930e2ee4f5911

Exploitation evidence

Disclosed: evidence found.
CVE published 24 Dec 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to 333deb6b43c11d5bce00463b364ac993d2fa02a6, 4ac26aafdc8c7271414e2e7c0b2cb266a26591bc or 1f73a56f986005f0bc64ed23873930e2ee4f5911.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 6f19b2c136d98a84d79030b53e23d405edfdc783, < 333deb6b43c11d5bce00463b364ac993d2fa02a6	Fixed in 333deb6b43c11d5bce00463b364ac993d2fa02a6
LinuxLinux	Affected ≥ 6f19b2c136d98a84d79030b53e23d405edfdc783, < 4ac26aafdc8c7271414e2e7c0b2cb266a26591bc	Fixed in 4ac26aafdc8c7271414e2e7c0b2cb266a26591bc
LinuxLinux	Affected ≥ 6f19b2c136d98a84d79030b53e23d405edfdc783, < 1f73a56f986005f0bc64ed23873930e2ee4f5911	Fixed in 1f73a56f986005f0bc64ed23873930e2ee4f5911
LinuxLinux	Affected =6.7	Fixed in–

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.

References

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