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.

https://git.kernel.org/stable/c/14e4689c113b4c06af1069364ade24fdd7055f33

https://git.kernel.org/stable/c/193989cc6d80dd8e0460fb3992e69fa03bf0ff9b

https://git.kernel.org/stable/c/19a9493faa4bf3c7bd0a386f30b60b1bb4a3da03

https://git.kernel.org/stable/c/25918720ba97f974a4f8d433b5a0132c5b43f6f3

https://git.kernel.org/stable/c/7d4f5004511757e3984901ffb412fcf858d80ed5

https://git.kernel.org/stable/c/c6376b9b1b4d2bad638256b1b3588e073344ae69

https://git.kernel.org/stable/c/d10730a1f2caf08088e0db1b19b242f3e6fa5f06

https://git.kernel.org/stable/c/e4feec3174036ba772006be74beee0efa09a9eb8

[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["include/net/ip_vs.h","net/netfilter/ipvs/ip_vs_ctl.c","net/netfilter/ipvs/ip_vs_sched.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"05f00505a89acd21f5d0d20f5797dfbc4cf85243","lessThan":"d10730a1f2caf08088e0db1b19b242f3e6fa5f06","versionType":"git","status":"affected"},{"version":"05f00505a89acd21f5d0d20f5797dfbc4cf85243","lessThan":"e4feec3174036ba772006be74beee0efa09a9eb8","versionType":"git","status":"affected"},{"version":"05f00505a89acd21f5d0d20f5797dfbc4cf85243","lessThan":"7d4f5004511757e3984901ffb412fcf858d80ed5","versionType":"git","status":"affected"},{"version":"05f00505a89acd21f5d0d20f5797dfbc4cf85243","lessThan":"c6376b9b1b4d2bad638256b1b3588e073344ae69","versionType":"git","status":"affected"},{"version":"05f00505a89acd21f5d0d20f5797dfbc4cf85243","lessThan":"14e4689c113b4c06af1069364ade24fdd7055f33","versionType":"git","status":"affected"},{"version":"05f00505a89acd21f5d0d20f5797dfbc4cf85243","lessThan":"25918720ba97f974a4f8d433b5a0132c5b43f6f3","versionType":"git","status":"affected"},{"version":"05f00505a89acd21f5d0d20f5797dfbc4cf85243","lessThan":"19a9493faa4bf3c7bd0a386f30b60b1bb4a3da03","versionType":"git","status":"affected"},{"version":"05f00505a89acd21f5d0d20f5797dfbc4cf85243","lessThan":"193989cc6d80dd8e0460fb3992e69fa03bf0ff9b","versionType":"git","status":"affected"},{"version":"c803fddd2a95a70873c68dbff42d4c59fd2e674e","versionType":"git","status":"affected"},{"version":"4ec8fb23158797affae7993c15beba080488482f","versionType":"git","status":"affected"},{"version":"3.18.23","lessThan":"3.19","versionType":"semver","status":"affected"},{"version":"4.1.11","lessThan":"4.2","versionType":"semver","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["include/net/ip_vs.h","net/netfilter/ipvs/ip_vs_ctl.c","net/netfilter/ipvs/ip_vs_sched.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"4.2","status":"affected"},{"version":"0","lessThan":"4.2","versionType":"semver","status":"unaffected"},{"version":"5.10.259","lessThanOrEqual":"5.10.*","versionType":"semver","status":"unaffected"},{"version":"5.15.210","lessThanOrEqual":"5.15.*","versionType":"semver","status":"unaffected"},{"version":"6.1.176","lessThanOrEqual":"6.1.*","versionType":"semver","status":"unaffected"},{"version":"6.6.143","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.94","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.36","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.0.13","lessThanOrEqual":"7.0.*","versionType":"semver","status":"unaffected"},{"version":"7.1","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]