ipvs: clear the svc scheduler ptr early on edit

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Summary

CVECVE-2026-53270
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-25 09:16:45 UTC
Updated2026-06-25 09:16:45 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 05f00505a89acd21f5d0d20f5797dfbc4cf85243 d10730a1f2caf08088e0db1b19b242f3e6fa5f06 git Not specified
CNA Linux Linux affected 05f00505a89acd21f5d0d20f5797dfbc4cf85243 e4feec3174036ba772006be74beee0efa09a9eb8 git Not specified
CNA Linux Linux affected 05f00505a89acd21f5d0d20f5797dfbc4cf85243 7d4f5004511757e3984901ffb412fcf858d80ed5 git Not specified
CNA Linux Linux affected 05f00505a89acd21f5d0d20f5797dfbc4cf85243 c6376b9b1b4d2bad638256b1b3588e073344ae69 git Not specified
CNA Linux Linux affected 05f00505a89acd21f5d0d20f5797dfbc4cf85243 14e4689c113b4c06af1069364ade24fdd7055f33 git Not specified
CNA Linux Linux affected 05f00505a89acd21f5d0d20f5797dfbc4cf85243 25918720ba97f974a4f8d433b5a0132c5b43f6f3 git Not specified
CNA Linux Linux affected 05f00505a89acd21f5d0d20f5797dfbc4cf85243 19a9493faa4bf3c7bd0a386f30b60b1bb4a3da03 git Not specified
CNA Linux Linux affected 05f00505a89acd21f5d0d20f5797dfbc4cf85243 193989cc6d80dd8e0460fb3992e69fa03bf0ff9b git Not specified
CNA Linux Linux affected c803fddd2a95a70873c68dbff42d4c59fd2e674e git Not specified
CNA Linux Linux affected 4ec8fb23158797affae7993c15beba080488482f git Not specified
CNA Linux Linux affected 3.18.23 3.19 semver Not specified
CNA Linux Linux affected 4.1.11 4.2 semver Not specified
CNA Linux Linux affected 4.2 Not specified
CNA Linux Linux unaffected 4.2 semver Not specified
CNA Linux Linux unaffected 5.10.259 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.210 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.176 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.143 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.94 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.36 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.13 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/25918720ba97f974a4f8d433b5a0132c5b43f6f3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c6376b9b1b4d2bad638256b1b3588e073344ae69 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e4feec3174036ba772006be74beee0efa09a9eb8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/193989cc6d80dd8e0460fb3992e69fa03bf0ff9b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d10730a1f2caf08088e0db1b19b242f3e6fa5f06 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7d4f5004511757e3984901ffb412fcf858d80ed5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/19a9493faa4bf3c7bd0a386f30b60b1bb4a3da03 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/14e4689c113b4c06af1069364ade24fdd7055f33 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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