In the Linux kernel, the following vulnerability has been resolved:
nfsd: never defer requests during idmap lookup
During v4 request compound arg decoding, some ops (e.g. SETATTR) can trigger idmap lookup upcalls. When those upcall responses get delayed beyond the allowed time limit, cache_check() will mark the request for deferral and cause it to be dropped.
This prevents nfs4svc_encode_compoundres from being executed, and thus the session slot flag NFSD4_SLOT_INUSE never gets cleared. Subsequent client requests will fail with NFSERR_JUKEBOX, given that the slot will be marked as in-use, making the SEQUENCE op fail.
Fix this by making sure that the RQ_USEDEFERRAL flag is always clear during nfs4svc_decode_compoundargs(), since no v4 request should ever be deferred.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade perf-debuginfoUpgrade python-perfUpgrade bpftoolUpgrade perfUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-toolsUpgrade kernel-tools-develUpgrade kernel-livepatch-5.15.202-141.223Upgrade bpftool-debuginfoUpgrade kernel-livepatch-5.10.252-250.992Upgrade kernel-develUpgrade kernel-tools-debuginfoUpgrade kernelUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-headers | Jun 17, 2026 | Jun 17, 2026 |
| Debian | — | Upgrade linux | May 28, 2026 | May 28, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | May 27, 2026 |
| Ubuntu | — | Upgrade linux-image-5.15.0-1112-awsUpgrade linux-image-5.15.0-1106-raspiUpgrade linux-image-6.8.0-1060-ibmUpgrade linux-image-aws-lts-22.04Upgrade linux-image-aws-lts-24.04Upgrade linux-image-azureUpgrade linux-image-oem-22.04cUpgrade linux-image-oracle-lts-22.04Upgrade linux-image-oracle-6.8Upgrade linux-image-azure-fde-lts-22.04Upgrade linux-image-oem-20.04bUpgrade linux-image-6.8.0-134-generic-64kUpgrade linux-image-oem-20.04dUpgrade linux-image-6.8.0-1062-azure-fipsUpgrade linux-image-6.8.0-1063-azureUpgrade linux-image-gcp-fips-6.8Upgrade linux-image-5.15.0-1111-realtimeUpgrade linux-image-5.15.0-1117-azure-fdeUpgrade linux-image-5.15.0-1064-nvidia-tegra-rtUpgrade linux-image-raspiUpgrade linux-image-nvidia-5.15Upgrade linux-image-nvidia-tegra-rt-5.15Upgrade linux-image-azure-5.15Upgrade linux-image-azure-fips-6.8Upgrade linux-image-raspi-6.8Upgrade linux-image-oem-22.04bUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-kvmUpgrade linux-image-genericUpgrade linux-image-nvidiaUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-azure-fde-6.8Upgrade linux-image-generic-64kUpgrade linux-image-fips-6.8Upgrade linux-image-6.8.0-1058-nvidia-lowlatency-64kUpgrade linux-image-ibmUpgrade linux-image-intelUpgrade linux-image-nvidia-64kUpgrade linux-image-xilinxUpgrade linux-image-6.8.0-2049-raspi-realtimeUpgrade linux-image-fips-5.15Upgrade linux-image-6.8.0-1029-nvidia-tegra-rtUpgrade linux-image-gcpUpgrade linux-image-gke-64k-6.8Upgrade linux-image-realtime-5.15Upgrade linux-image-ibm-6.8Upgrade linux-image-5.15.0-186-generic-lpaeUpgrade linux-image-gcp-64k-6.8Upgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-6.8.0-136-genericUpgrade linux-image-nvidia-tegra-igx-5.15Upgrade linux-image-5.15.0-1053-nvidia-tegra-igx-rtUpgrade linux-image-6.8.0-1045-gkeopUpgrade linux-image-6.8.0-134-lowlatency-64kUpgrade linux-image-oem-20.04Upgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-6.8.0-1060-awsUpgrade linux-image-gke-6.8Upgrade linux-image-5.15.0-1112-aws-fipsUpgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-laptop-23.10Upgrade linux-image-kvm-5.15Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-aws-64k-lts-22.04Upgrade linux-image-5.15.0-1064-nvidia-tegraUpgrade linux-image-6.8.0-1029-nvidia-tegraUpgrade linux-image-nvidia-tegra-5.15Upgrade linux-image-aws-64kUpgrade linux-image-5.15.0-1075-xilinx-zynqmpUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-xilinx-6.8Upgrade linux-image-6.8.0-1063-gcp-64kUpgrade linux-image-raspi-realtime-6.8Upgrade linux-image-6.8.0-1058-gke-64kUpgrade linux-image-oem-22.04dUpgrade linux-image-5.15.0-1112-aws-64kUpgrade linux-image-oracle-64k-6.8Upgrade linux-image-5.15.0-1109-oracleUpgrade linux-image-oracle-64kUpgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-raspi-realtimeUpgrade linux-image-virtualUpgrade linux-image-5.15.0-1112-gcpUpgrade linux-image-intel-iot-realtimeUpgrade linux-image-intel-iotgUpgrade linux-image-gkeopUpgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-generic-6.8Upgrade linux-image-oem-20.04cUpgrade linux-image-aws-fips-6.8Upgrade linux-image-raspi-5.15Upgrade linux-image-virtual-hwe-20.04Upgrade linux-image-5.15.0-186-genericUpgrade linux-image-nvidia-tegraUpgrade linux-image-aws-64k-6.8Upgrade linux-image-gcp-64kUpgrade linux-image-gkeUpgrade linux-image-oem-22.04aUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-6.8.1-1055-realtimeUpgrade linux-image-aws-5.15Upgrade linux-image-6.8.0-1057-oracle-64kUpgrade linux-image-aws-6.8Upgrade linux-image-5.15.0-1107-nvidiaUpgrade linux-image-5.15.0-184-lowlatencyUpgrade linux-image-azure-lts-22.04Upgrade linux-image-6.8.0-1058-nvidiaUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-6.8.0-136-generic-64kUpgrade linux-image-virtual-5.15Upgrade linux-image-azure-6.8Upgrade linux-image-ibm-classicUpgrade linux-image-nvidia-tegra-igx-rtUpgrade linux-image-realtime-6.8.1Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-generic-lpae-5.15Upgrade linux-image-gkeop-5.15Upgrade linux-image-5.15.0-1107-intel-iotgUpgrade linux-image-6.8.0-1060-aws-fipsUpgrade linux-image-realtime-hwe-22.04Upgrade linux-image-xilinx-zynqmpUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-6.8.0-1062-azure-fdeUpgrade linux-image-ibm-5.15Upgrade linux-image-azure-lts-24.04Upgrade linux-image-azure-fips-5.15Upgrade linux-image-realtimeUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-intel-iot-realtime-5.15Upgrade linux-image-6.8.0-1060-raspiUpgrade linux-image-6.8.0-1032-xilinxUpgrade linux-image-nvidia-tegra-rt-6.8Upgrade linux-image-nvidia-lowlatencyUpgrade linux-image-6.8.0-134-genericUpgrade linux-image-virtual-6.8Upgrade linux-image-oracle-5.15Upgrade linux-image-oracleUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-lowlatency-5.15Upgrade linux-image-lowlatencyUpgrade linux-image-6.8.0-134-fipsUpgrade linux-image-6.8.0-1058-gkeUpgrade linux-image-5.15.0-1117-azureUpgrade linux-image-5.15.0-1112-gcp-fipsUpgrade linux-image-xilinx-zynqmp-5.15Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-azure-cvmUpgrade linux-image-awsUpgrade linux-image-lowlatency-6.8Upgrade linux-image-gkeop-6.8Upgrade linux-image-6.8.0-1063-gcpUpgrade linux-image-5.15.0-1108-gkeUpgrade linux-image-5.15.0-1106-ibmUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-aws-fips-5.15Upgrade linux-image-generic-64k-5.15Upgrade linux-image-generic-lpaeUpgrade linux-image-gcp-fipsUpgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-aws-64k-5.15Upgrade linux-image-6.8.0-1058-nvidia-64kUpgrade linux-image-nvidia-tegra-igxUpgrade linux-image-5.15.0-184-lowlatency-64kUpgrade linux-image-6.8.0-1060-aws-64kUpgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-nvidia-lowlatency-5.15Upgrade linux-image-6.8.0-1063-gcp-fipsUpgrade linux-image-nvidia-tegra-igx-rt-5.15Upgrade linux-image-lowlatency-64k-5.15Upgrade linux-image-gcp-5.15Upgrade linux-image-lowlatency-64kUpgrade linux-image-6.8.0-1057-oracleUpgrade linux-image-5.15.0-186-fipsUpgrade linux-image-5.15.0-1095-gkeopUpgrade linux-image-oem-22.04Upgrade linux-image-generic-5.15Upgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-5.15.0-1104-intel-iot-realtimeUpgrade linux-image-5.15.0-1053-nvidia-tegra-igxUpgrade linux-image-azure-fde-5.15Upgrade linux-image-azure-fdeUpgrade linux-image-6.8.0-134-lowlatencyUpgrade linux-image-6.8.0-1058-nvidia-lowlatencyUpgrade linux-image-5.15.0-1107-nvidia-lowlatencyUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-gke-64kUpgrade linux-image-intel-iotg-5.15Upgrade linux-image-gcp-6.8Upgrade linux-image-azure-fipsUpgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-5.15.0-186-generic-64kUpgrade linux-image-5.15.0-1117-azure-fipsUpgrade linux-image-raspi-nolpaeUpgrade linux-image-gke-5.15Upgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-generic-64k-6.8Upgrade linux-image-fipsUpgrade linux-image-aws-fipsUpgrade linux-image-gcp-fips-5.15Upgrade linux-image-nvidia-tegra-6.8Upgrade linux-image-5.15.0-1104-kvmUpgrade linux-image-nvidia-tegra-rtUpgrade linux-image-nvidia-6.8 | Jul 2, 2026 | Jul 1, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jun 12, 2026 | May 27, 2026 |
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