{"id":"CVE-2025-68353","title":"net: vxlan: prevent NULL deref in vxlan_xmit_one","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: vxlan: prevent NULL deref in vxlan_xmit_one\n\nNeither sock4 nor sock6 pointers are guaranteed to be non-NULL in\nvxlan_xmit_one, e.g. if the iface is brought down. T…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 6f19b2c136d98a84d79030b53e23d405edfdc783 < 333deb6b43c11d5bce00463b364ac993d2fa02a6","Linux >= 6f19b2c136d98a84d79030b53e23d405edfdc783 < 4ac26aafdc8c7271414e2e7c0b2cb266a26591bc","Linux >= 6f19b2c136d98a84d79030b53e23d405edfdc783 < 1f73a56f986005f0bc64ed23873930e2ee4f5911","Linux 6.7"],"published":"2025-12-24","updated":"2026-10-21","sourceUpdated":"2026-10-21T12:38:14.894Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-68353","references":[{"url":"https://git.kernel.org/stable/c/333deb6b43c11d5bce00463b364ac993d2fa02a6"},{"url":"https://git.kernel.org/stable/c/4ac26aafdc8c7271414e2e7c0b2cb266a26591bc"},{"url":"https://git.kernel.org/stable/c/1f73a56f986005f0bc64ed23873930e2ee4f5911"}],"tags":["cve.org"],"epss":0.00222,"epssPercentile":0.12682,"ingestedAt":"2026-10-21T12:48:53.678Z","slug":"CVE-2025-68353","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet: vxlan: prevent NULL deref in vxlan_xmit_one\n\nNeither sock4 nor sock6 pointers are guaranteed to be non-NULL in\nvxlan_xmit_one, e.g. if the iface is brought down. This can lead to the\nfollowing NULL dereference:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000010\n  Oops: Oops: 0000 [#1] SMP NOPTI\n  RIP: 0010:vxlan_xmit_one+0xbb3/0x1580\n  Call Trace:\n   vxlan_xmit+0x429/0x610\n   dev_hard_start_xmit+0x55/0xa0\n   __dev_queue_xmit+0x6d0/0x7f0\n   ip_finish_output2+0x24b/0x590\n   ip_output+0x63/0x110\n\nMentioned commits changed the code path in vxlan_xmit_one and as a side\neffect the sock4/6 pointer validity checks in vxlan(6)_get_route were\nlost. Fix this by adding back checks.\n\nSince both commits being fixed were released in the same version (v6.7)\nand are strongly related, bundle the fixes in a single commit.\n\n## Affected\n\n- `Linux >= 6f19b2c136d98a84d79030b53e23d405edfdc783 < 333deb6b43c11d5bce00463b364ac993d2fa02a6`\n- `Linux >= 6f19b2c136d98a84d79030b53e23d405edfdc783 < 4ac26aafdc8c7271414e2e7c0b2cb266a26591bc`\n- `Linux >= 6f19b2c136d98a84d79030b53e23d405edfdc783 < 1f73a56f986005f0bc64ed23873930e2ee4f5911`\n- `Linux 6.7`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}