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 kernel-develUpgrade kernel-tools-develUpgrade bpftool-debuginfoUpgrade kernel-livepatch-5.15.202-141.223Upgrade perfUpgrade python-perfUpgrade kernel-livepatch-5.10.252-250.992Upgrade bpftoolUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernelUpgrade kernel-headersUpgrade python-perf-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-tools | 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-gcp-fips-5.15Upgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-fipsUpgrade linux-image-gke-5.15Upgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-generic-64k-6.8Upgrade linux-image-nvidia-tegra-6.8Upgrade linux-image-azure-cvmUpgrade linux-image-lowlatency-6.8Upgrade linux-image-6.8.0-134-genericUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-5.15.0-1108-gkeUpgrade linux-image-6.8.0-1063-gcpUpgrade linux-image-nvidia-tegra-rt-6.8Upgrade linux-image-realtimeUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-oracle-5.15Upgrade linux-image-lowlatency-5.15Upgrade linux-image-aws-fips-5.15Upgrade linux-image-6.8.0-1058-gkeUpgrade linux-image-6.8.0-134-fipsUpgrade linux-image-lowlatencyUpgrade linux-image-oracleUpgrade linux-image-virtual-6.8Upgrade linux-image-xilinx-zynqmp-5.15Upgrade linux-image-nvidia-64k-6.8Upgrade linux-image-5.15.0-1112-gcp-fipsUpgrade linux-image-5.15.0-1117-azureUpgrade linux-image-5.15.0-1106-ibmUpgrade linux-image-6.8.0-1060-raspiUpgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-azure-fipsUpgrade linux-image-6.8.0-1032-xilinxUpgrade linux-image-gcp-6.8Upgrade linux-image-awsUpgrade linux-image-5.15.0-1117-azure-fipsUpgrade linux-image-5.15.0-186-generic-64kUpgrade linux-image-gke-64kUpgrade linux-image-5.15.0-1095-gkeopUpgrade linux-image-gkeop-6.8Upgrade linux-image-nvidia-tegra-igx-rt-5.15Upgrade linux-image-raspi-nolpaeUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-134-lowlatencyUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-intel-iot-realtime-5.15Upgrade linux-image-5.15.0-1107-nvidia-lowlatencyUpgrade linux-image-azure-fde-5.15Upgrade linux-image-5.15.0-1104-intel-iot-realtimeUpgrade linux-image-generic-5.15Upgrade linux-image-6.8.0-1057-oracleUpgrade linux-image-lowlatency-64k-5.15Upgrade linux-image-6.8.0-1058-nvidia-lowlatencyUpgrade linux-image-azure-fdeUpgrade linux-image-oem-22.04Upgrade linux-image-5.15.0-186-fipsUpgrade linux-image-5.15.0-1053-nvidia-tegra-igxUpgrade linux-image-intel-iotg-5.15Upgrade linux-image-aws-fipsUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-generic-64k-5.15Upgrade linux-image-generic-lpaeUpgrade linux-image-gcp-fipsUpgrade linux-image-5.15.0-184-lowlatency-64kUpgrade linux-image-nvidia-tegra-igxUpgrade linux-image-aws-64k-5.15Upgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-6.8.0-1058-nvidia-64kUpgrade linux-image-ibm-5.15Upgrade linux-image-nvidia-6.8Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-nvidia-lowlatency-5.15Upgrade linux-image-6.8.0-1062-azure-fdeUpgrade linux-image-azure-fips-5.15Upgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-6.8.0-1060-aws-64kUpgrade linux-image-nvidia-tegra-rtUpgrade linux-image-azure-lts-24.04Upgrade linux-image-5.15.0-1104-kvmUpgrade linux-image-6.8.0-1063-gcp-fipsUpgrade linux-image-gcp-5.15Upgrade linux-image-lowlatency-64kUpgrade linux-image-virtual-5.15Upgrade linux-image-realtime-5.15Upgrade linux-image-virtual-hwe-22.04Upgrade linux-image-genericUpgrade linux-image-gke-64k-6.8Upgrade linux-image-gke-6.8Upgrade linux-image-oem-20.04Upgrade linux-image-5.15.0-1112-awsUpgrade linux-image-5.15.0-1106-raspiUpgrade linux-image-azureUpgrade linux-image-aws-lts-24.04Upgrade linux-image-aws-lts-22.04Upgrade linux-image-gcpUpgrade linux-image-generic-lpae-5.15Upgrade linux-image-6.8.0-1058-nvidiaUpgrade linux-image-6.8.0-1058-nvidia-lowlatency-64kUpgrade linux-image-6.8.1-1055-realtimeUpgrade linux-image-gkeUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-raspi-realtimeUpgrade linux-image-nvidiaUpgrade linux-image-6.8.0-1057-oracle-64kUpgrade linux-image-6.8.0-136-generic-64kUpgrade linux-image-5.15.0-1107-intel-iotgUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-virtual-hwe-20.04Upgrade linux-image-virtualUpgrade linux-image-generic-6.8Upgrade linux-image-aws-64k-6.8Upgrade linux-image-6.8.0-1060-aws-fipsUpgrade linux-image-5.15.0-186-genericUpgrade linux-image-5.15.0-1112-aws-64kUpgrade linux-image-5.15.0-1109-oracleUpgrade linux-image-oem-20.04cUpgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-intel-iotgUpgrade linux-image-intel-iot-realtimeUpgrade linux-image-gkeopUpgrade linux-image-oracle-64k-6.8Upgrade linux-image-kvmUpgrade linux-image-nvidia-tegra-rt-5.15Upgrade linux-image-nvidia-5.15Upgrade linux-image-azure-5.15Upgrade linux-image-aws-64k-lts-22.04Upgrade linux-image-6.8.0-1058-gke-64kUpgrade linux-image-5.15.0-1112-aws-fipsUpgrade linux-image-xilinx-6.8Upgrade linux-image-xilinxUpgrade linux-image-kvm-5.15Upgrade linux-image-raspi-6.8Upgrade linux-image-raspi-realtime-6.8Upgrade linux-image-5.15.0-1117-azure-fdeUpgrade linux-image-5.15.0-1112-gcpUpgrade linux-image-5.15.0-1111-realtimeUpgrade linux-image-5.15.0-1064-nvidia-tegra-rtUpgrade linux-image-5.15.0-1064-nvidia-tegraUpgrade linux-image-oracle-64kUpgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-generic-hwe-22.04Upgrade linux-image-generic-64kUpgrade linux-image-fips-6.8Upgrade linux-image-azure-fde-6.8Upgrade linux-image-aws-fips-6.8Upgrade linux-image-aws-64kUpgrade linux-image-5.15.0-186-generic-lpaeUpgrade linux-image-5.15.0-184-lowlatencyUpgrade linux-image-5.15.0-1107-nvidiaUpgrade linux-image-oem-22.04aUpgrade linux-image-nvidia-tegraUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-azure-6.8Upgrade linux-image-aws-6.8Upgrade linux-image-gcp-64kUpgrade linux-image-azure-lts-22.04Upgrade linux-image-oem-20.04bUpgrade linux-image-raspiUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-oracle-lts-22.04Upgrade linux-image-oracle-6.8Upgrade linux-image-oem-22.04cUpgrade linux-image-oem-20.04dUpgrade linux-image-gcp-fips-6.8Upgrade linux-image-azure-fips-6.8Upgrade linux-image-azure-fde-lts-22.04Upgrade linux-image-6.8.0-134-generic-64kUpgrade linux-image-6.8.0-1063-azureUpgrade linux-image-6.8.0-1062-azure-fipsUpgrade linux-image-6.8.0-1029-nvidia-tegraUpgrade linux-image-5.15.0-1075-xilinx-zynqmpUpgrade linux-image-aws-5.15Upgrade linux-image-oem-22.04bUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-raspi-5.15Upgrade linux-image-oem-22.04dUpgrade linux-image-nvidia-tegra-5.15Upgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-realtime-hwe-22.04Upgrade linux-image-gcp-64k-6.8Upgrade linux-image-6.8.0-136-genericUpgrade linux-image-6.8.0-134-lowlatency-64kUpgrade linux-image-6.8.0-1045-gkeopUpgrade linux-image-5.15.0-1053-nvidia-tegra-igx-rtUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-laptop-23.10Upgrade linux-image-6.8.0-1060-awsUpgrade linux-image-6.8.0-1063-gcp-64kUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-realtime-6.8.1Upgrade linux-image-nvidia-tegra-igx-rtUpgrade linux-image-ibm-classicUpgrade linux-image-gkeop-5.15Upgrade linux-image-6.8.0-1060-ibmUpgrade linux-image-nvidia-tegra-igx-5.15Upgrade linux-image-nvidia-64kUpgrade linux-image-intelUpgrade linux-image-ibm-6.8Upgrade linux-image-ibmUpgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-fips-5.15Upgrade linux-image-6.8.0-2049-raspi-realtimeUpgrade linux-image-6.8.0-1029-nvidia-tegra-rt | 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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