CVE-2026-53270
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.12%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.12% probability · 2th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/14e4689c113b4c06af1069364ade24fdd7055f33Patch
- https://git.kernel.org/stable/c/193989cc6d80dd8e0460fb3992e69fa03bf0ff9bPatch
- https://git.kernel.org/stable/c/19a9493faa4bf3c7bd0a386f30b60b1bb4a3da03Patch
- https://git.kernel.org/stable/c/25918720ba97f974a4f8d433b5a0132c5b43f6f3Patch
- https://git.kernel.org/stable/c/7d4f5004511757e3984901ffb412fcf858d80ed5Patch
- https://git.kernel.org/stable/c/c6376b9b1b4d2bad638256b1b3588e073344ae69Patch
- https://git.kernel.org/stable/c/d10730a1f2caf08088e0db1b19b242f3e6fa5f06Patch
- https://git.kernel.org/stable/c/e4feec3174036ba772006be74beee0efa09a9eb8Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.