PT-2026-52365 · Linux · Linux

Published 2026-06-25 · Updated 2026-06-25 · CVE-2026-53270

Mitre

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.

Related Identifiers

CVE-2026-53270

Affected Products

Linux

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-53270 · Security Note
• https://git.kernel.org/stable/c/c6376b9b1b4d2bad638256b1b3588e073344ae69 · Note
• https://git.kernel.org/stable/c/193989cc6d80dd8e0460fb3992e69fa03bf0ff9b · Note
• https://git.kernel.org/stable/c/e4feec3174036ba772006be74beee0efa09a9eb8 · Note
• https://git.kernel.org/stable/c/7d4f5004511757e3984901ffb412fcf858d80ed5 · Note
• https://git.kernel.org/stable/c/19a9493faa4bf3c7bd0a386f30b60b1bb4a3da03 · Note
• https://git.kernel.org/stable/c/d10730a1f2caf08088e0db1b19b242f3e6fa5f06 · Note
• https://git.kernel.org/stable/c/14e4689c113b4c06af1069364ade24fdd7055f33 · Note
• https://git.kernel.org/stable/c/25918720ba97f974a4f8d433b5a0132c5b43f6f3 · Note