{"id":"CVE-2025-39965","title":"xfrm: xfrm_alloc_spi shouldn't use 0 as SPI","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: xfrm_alloc_spi shouldn't use 0 as SPI\n\nx->id.spi == 0 means \"no SPI assigned\", but since commit\n94f39804d891 (\"xfrm: Duplicate SPI Handling\"), we now create state…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 3d8090bb53424432fa788fe9a49e8ceca74f0544 < 0baf92d0b1590b903c1f4ead75e61715e50e8146","Linux >= 2fc5b54368a1bf1d2d74b4d3b8eea5309a653e38 < 9fcedabaae0096f712bbb4ccca6a8538af1cd1c8","Linux >= 29e9158f91f99057dbd35db5e8674d93b38549fe < a78e55776522373c446f18d5002a8de4b09e6bf7","Linux >= 94f39804d891cffe4ce17737d295f3b195bc7299 < cd8ae32e4e4652db55bce6b9c79267d8946765a9","Linux fb58962aa3b9359988c7b5b15a971fd9ad5b0ecd","Linux c67d4e7a8f90fb6361ca89d4d5c9a28f4e935e47","Linux >= 6.1.191 < 6.2","Linux >= 6.15.11 < 6.16","Linux >= 6.6.103 < 6.6.109","Linux >= 6.12.43 < 6.12.50","Linux >= 6.16.2 < 6.16.10"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-15T21:55:18.566568Z"},"exploitAvailable":true,"published":"2025-10-13","updated":"2026-10-30","sourceUpdated":"2026-10-30T12:22:40.645Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-39965","references":[{"url":"https://git.kernel.org/stable/c/0baf92d0b1590b903c1f4ead75e61715e50e8146"},{"url":"https://git.kernel.org/stable/c/9fcedabaae0096f712bbb4ccca6a8538af1cd1c8"},{"url":"https://git.kernel.org/stable/c/a78e55776522373c446f18d5002a8de4b09e6bf7"},{"url":"https://git.kernel.org/stable/c/cd8ae32e4e4652db55bce6b9c79267d8946765a9"}],"tags":["cve.org","exploit-available"],"epss":0.00199,"epssPercentile":0.09842,"exploits":{"github":1,"githubRepos":["https://github.com/Shreyas-Penkar/CVE-2025-39965"],"checkedAt":"2026-11-03T21:56:27.345Z"},"ingestedAt":"2026-10-15T22:48:25.533Z","slug":"CVE-2025-39965","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: xfrm_alloc_spi shouldn't use 0 as SPI\n\nx->id.spi == 0 means \"no SPI assigned\", but since commit\n94f39804d891 (\"xfrm: Duplicate SPI Handling\"), we now create states\nand add them to the byspi list with this value.\n\n__xfrm_state_delete doesn't remove those states from the byspi list,\nsince they shouldn't be there, and this shows up as a UAF the next\ntime we go through the byspi list.\n\n## Affected\n\n- `Linux >= 3d8090bb53424432fa788fe9a49e8ceca74f0544 < 0baf92d0b1590b903c1f4ead75e61715e50e8146`\n- `Linux >= 2fc5b54368a1bf1d2d74b4d3b8eea5309a653e38 < 9fcedabaae0096f712bbb4ccca6a8538af1cd1c8`\n- `Linux >= 29e9158f91f99057dbd35db5e8674d93b38549fe < a78e55776522373c446f18d5002a8de4b09e6bf7`\n- `Linux >= 94f39804d891cffe4ce17737d295f3b195bc7299 < cd8ae32e4e4652db55bce6b9c79267d8946765a9`\n- `Linux fb58962aa3b9359988c7b5b15a971fd9ad5b0ecd`\n- `Linux c67d4e7a8f90fb6361ca89d4d5c9a28f4e935e47`\n- `Linux >= 6.1.191 < 6.2`\n- `Linux >= 6.15.11 < 6.16`\n- `Linux >= 6.6.103 < 6.6.109`\n- `Linux >= 6.12.43 < 6.12.50`\n- `Linux >= 6.16.2 < 6.16.10`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":55,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[]}