{"id":"CVE-2026-53270","title":"ipvs: clear the svc scheduler ptr early on edit","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nipvs: clear the svc scheduler ptr early on edit\n\nip_vs_edit_service() while unbinding the old scheduler clears\nthe svc->scheduler ptr after the scheduler module initiat…","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 >= 05f00505a89acd21f5d0d20f5797dfbc4cf85243 < d10730a1f2caf08088e0db1b19b242f3e6fa5f06","Linux >= 05f00505a89acd21f5d0d20f5797dfbc4cf85243 < e4feec3174036ba772006be74beee0efa09a9eb8","Linux >= 05f00505a89acd21f5d0d20f5797dfbc4cf85243 < 7d4f5004511757e3984901ffb412fcf858d80ed5","Linux >= 05f00505a89acd21f5d0d20f5797dfbc4cf85243 < c6376b9b1b4d2bad638256b1b3588e073344ae69","Linux >= 05f00505a89acd21f5d0d20f5797dfbc4cf85243 < 14e4689c113b4c06af1069364ade24fdd7055f33","Linux >= 05f00505a89acd21f5d0d20f5797dfbc4cf85243 < 25918720ba97f974a4f8d433b5a0132c5b43f6f3","Linux >= 05f00505a89acd21f5d0d20f5797dfbc4cf85243 < 19a9493faa4bf3c7bd0a386f30b60b1bb4a3da03","Linux >= 05f00505a89acd21f5d0d20f5797dfbc4cf85243 < 193989cc6d80dd8e0460fb3992e69fa03bf0ff9b","Linux c803fddd2a95a70873c68dbff42d4c59fd2e674e","Linux 4ec8fb23158797affae7993c15beba080488482f","Linux >= 3.18.23 < 3.19","Linux >= 4.1.11 < 4.2","Linux 4.2"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T15:28:13.169684Z"},"published":"2026-06-25","updated":"2026-10-16","sourceUpdated":"2026-10-16T15:31:44.852Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53270","references":[{"url":"https://git.kernel.org/stable/c/d10730a1f2caf08088e0db1b19b242f3e6fa5f06"},{"url":"https://git.kernel.org/stable/c/e4feec3174036ba772006be74beee0efa09a9eb8"},{"url":"https://git.kernel.org/stable/c/7d4f5004511757e3984901ffb412fcf858d80ed5"},{"url":"https://git.kernel.org/stable/c/c6376b9b1b4d2bad638256b1b3588e073344ae69"},{"url":"https://git.kernel.org/stable/c/14e4689c113b4c06af1069364ade24fdd7055f33"},{"url":"https://git.kernel.org/stable/c/25918720ba97f974a4f8d433b5a0132c5b43f6f3"},{"url":"https://git.kernel.org/stable/c/19a9493faa4bf3c7bd0a386f30b60b1bb4a3da03"},{"url":"https://git.kernel.org/stable/c/193989cc6d80dd8e0460fb3992e69fa03bf0ff9b"}],"tags":["cve.org"],"epss":0.00121,"epssPercentile":0.01749,"ingestedAt":"2026-10-16T17:24:46.740Z","slug":"CVE-2026-53270","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nipvs: clear the svc scheduler ptr early on edit\n\nip_vs_edit_service() while unbinding the old scheduler clears\nthe svc->scheduler ptr after the scheduler module initiates\nRCU callbacks. This can cause packets to use the old\nscheduler at the time when svc->sched_data is already freed\nafter RCU grace period.\n\nFix it by clearing the ptr early in ip_vs_unbind_scheduler(),\nbefore the done_service method schedules any RCU callbacks.\n\nAlso, if the new scheduler fails to initialize when replacing\nthe old scheduler, try to restore the old scheduler while still\nreturning the error code.\n\n## Affected\n\n- `Linux >= 05f00505a89acd21f5d0d20f5797dfbc4cf85243 < d10730a1f2caf08088e0db1b19b242f3e6fa5f06`\n- `Linux >= 05f00505a89acd21f5d0d20f5797dfbc4cf85243 < e4feec3174036ba772006be74beee0efa09a9eb8`\n- `Linux >= 05f00505a89acd21f5d0d20f5797dfbc4cf85243 < 7d4f5004511757e3984901ffb412fcf858d80ed5`\n- `Linux >= 05f00505a89acd21f5d0d20f5797dfbc4cf85243 < c6376b9b1b4d2bad638256b1b3588e073344ae69`\n- `Linux >= 05f00505a89acd21f5d0d20f5797dfbc4cf85243 < 14e4689c113b4c06af1069364ade24fdd7055f33`\n- `Linux >= 05f00505a89acd21f5d0d20f5797dfbc4cf85243 < 25918720ba97f974a4f8d433b5a0132c5b43f6f3`\n- `Linux >= 05f00505a89acd21f5d0d20f5797dfbc4cf85243 < 19a9493faa4bf3c7bd0a386f30b60b1bb4a3da03`\n- `Linux >= 05f00505a89acd21f5d0d20f5797dfbc4cf85243 < 193989cc6d80dd8e0460fb3992e69fa03bf0ff9b`\n- `Linux c803fddd2a95a70873c68dbff42d4c59fd2e674e`\n- `Linux 4ec8fb23158797affae7993c15beba080488482f`\n- `Linux >= 3.18.23 < 3.19`\n- `Linux >= 4.1.11 < 4.2`\n- `Linux 4.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}