High 7.8Published Jun 25, 2026

CVE-2026-53270ipvs: clear the svc scheduler ptr early on edit

Updated under an hour ago (Oct 28, 2026, 2:10 AM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: ipvs: clear the svc scheduler ptr early on edit ip_vs_edit_service() while unbinding the old scheduler clears the svc->scheduler ptr after the scheduler module initiates RCU callbacks. This can cause packets to use the old scheduler at the time when svc->sched_data is already freed after RCU grace period. Fix it by clearing the ptr early in ip_vs_unbind_scheduler(), before the done_service method schedules any RCU callbacks. Also, if the new scheduler fails to initialize when replacing the old scheduler, try to restore the old scheduler while still returning the error code.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-416
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 05f00505a89acd21f5d0d20f5797dfbc4cf85243 before d10730a1f2caf08088e0db1b19b242f3e6fa5f06; from 05f00505a89acd21f5d0d20f5797dfbc4cf85243 before e4feec3174036ba772006be74beee0efa09a9eb8; from 05f00505a89acd21f5d0d20f5797dfbc4cf85243 before 7d4f5004511757e3984901ffb412fcf858d80ed5; from 05f00505a89acd21f5d0d20f5797dfbc4cf85243 before c6376b9b1b4d2bad638256b1b3588e073344ae69; from 05f00505a89acd21f5d0d20f5797dfbc4cf85243 before 14e4689c113b4c06af1069364ade24fdd7055f33; from 05f00505a89acd21f5d0d20f5797dfbc4cf85243 before 25918720ba97f974a4f8d433b5a0132c5b43f6f3; from 05f00505a89acd21f5d0d20f5797dfbc4cf85243 before 19a9493faa4bf3c7bd0a386f30b60b1bb4a3da03; from 05f00505a89acd21f5d0d20f5797dfbc4cf85243 before 193989cc6d80dd8e0460fb3992e69fa03bf0ff9b; and 4 more ranges	CNA record
linux linux_kernel linux:linux_kernel	from 3.18.23 before 3.19; from 4.1.11 before 4.2; from 4.2.1 before 5.10.259; from 5.11 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.94; from 6.13 before 6.18.36; and 12 more ranges	NVD

References

References

https://git.kernel.org/stable/c/d10730a1f2caf08088e0db1b19b242f3e6fa5f06	patch
https://git.kernel.org/stable/c/e4feec3174036ba772006be74beee0efa09a9eb8	patch
https://git.kernel.org/stable/c/7d4f5004511757e3984901ffb412fcf858d80ed5	patch
https://git.kernel.org/stable/c/c6376b9b1b4d2bad638256b1b3588e073344ae69	patch
https://git.kernel.org/stable/c/14e4689c113b4c06af1069364ade24fdd7055f33	patch
https://git.kernel.org/stable/c/25918720ba97f974a4f8d433b5a0132c5b43f6f3	patch
https://git.kernel.org/stable/c/19a9493faa4bf3c7bd0a386f30b60b1bb4a3da03	patch
https://git.kernel.org/stable/c/193989cc6d80dd8e0460fb3992e69fa03bf0ff9b	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.