5.7

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

Deferred
AliasesUBUNTU-CVE-2025-68353DEBIAN-CVE-2025-68353
Published 24-12-2025Last modified 21-10-2026

Vulnerability summary

CVE-2025-68353 is a medium (CVSS 5.7) vulnerability in linux. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 12.8% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.7, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.7/10
010
Medium · v4.0 (OSV · Ubuntu), selected by version preference
EPSS score
0.22%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 12 · Related 13
OPENSUSE-SU-2026:10039-1OPENSUSE-SU-2026:10301-1OPENSUSE-SU-2026:20145-1SUSE-SU-2026:20207-1SUSE-SU-2026:20220-1SUSE-SU-2026:20228-1

Timeline

  1. 24-12-2025
    PublishedVulnerability first disclosed.
  2. 21-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

13%

Versus all other CVEs

30-day change

Increase +0.04 pp

From 0.19% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu132 products
  • linuxAll versions (No fix recorded) | < 6.17.0-22.22
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.17.0-1012.12
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linuxAll versions (No fix recorded) | < 6.12.115-2 | < 6.18.3-1
Linux1 product
  • linux≥ 6f19b2c136d98a84d79030b53e23d405edfdc783, < 333deb6b43c11d5bce00463b364ac993d2fa02a6 | ≥ 6f19b2c136d98a84d79030b53e23d405edfdc783, < 4ac26aafdc8c7271414e2e7c0b2cb266a26591bc | ≥ 6f19b2c136d98a84d79030b53e23d405edfdc783, < 1f73a56f986005f0bc64ed23873930e2ee4f5911 | 6.7

3 vendors · 134 products

References

12 links
Show all 12 references