In the Linux kernel, the following vulnerability has been resolved:
nfsd: allow SC_STATUS_FREEABLE when searching via nfs4_lookup_stateid()
The pynfs DELEG8 test fails when run against nfsd. It acquires a delegation and then lets the lease time out. It then tries to use the deleg stateid and expects to see NFS4ERR_DELEG_REVOKED, but it gets bad NFS4ERR_BAD_STATEID instead.
When a delegation is revoked, it's initially marked with SC_STATUS_REVOKED, or SC_STATUS_ADMIN_REVOKED and later, it's marked with the SC_STATUS_FREEABLE flag, which denotes that it is waiting for s FREE_STATEID call.
nfs4_lookup_stateid() accepts a statusmask that includes the status flags that a found stateid is allowed to have. Currently, that mask never includes SC_STATUS_FREEABLE, which means that revoked delegations are (almost) never found.
Add SC_STATUS_FREEABLE to the always-allowed status flags, and remove it from nfsd4_delegreturn() since it's now always implied.
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel-libbpfUpgrade kernel6.12-debuginfo-common-x86_64Upgrade perf6.12-debuginfoUpgrade kernel-tools-debuginfoUpgrade bpftool-debuginfoUpgrade kernel-livepatch-6.12.23-29.97Upgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel-libbpf-debuginfoUpgrade kernel-tools-develUpgrade kernel6.12-modules-extraUpgrade kernel6.12Upgrade kernel-develUpgrade kernel-headersUpgrade kernel-toolsUpgrade perf6.12Upgrade python3-perf6.12Upgrade kernel-modules-extra-commonUpgrade kernel-libbpf-develUpgrade bpftoolUpgrade python3-perf6.12-debuginfoUpgrade kernel6.12-debuginfoUpgrade kernel-libbpf-static | Aug 5, 2025 | Apr 18, 2025 |
| Debian | — | Upgrade linux | Jul 23, 2026 | Jul 23, 2026 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Apr 18, 2025 |
| Suse | — | Upgrade kernel-64kbUpgrade kernel-source-azureUpgrade kernel-64kb-extraUpgrade kernel-symsUpgrade kernel-devel-azureUpgrade kernel-azure-develUpgrade kernel-source-vanillaUpgrade kernel-zfcpdumpUpgrade kernel-develUpgrade kernel-kvmsmall-develUpgrade kernel-sourceUpgrade kernel-64kb-develUpgrade kernel-default-develUpgrade kernel-default-vdsoUpgrade kernel-azureUpgrade kernel-default-livepatchUpgrade kernel-kvmsmallUpgrade kernel-docs-htmlUpgrade kernel-default-extraUpgrade kernel-kvmsmall-vdsoUpgrade kernel-defaultUpgrade kernel-azure-extraUpgrade kernel-macrosUpgrade kernel-obs-qaUpgrade kernel-docsUpgrade kernel-azure-vdso | Dec 5, 2025 | Dec 5, 2025 |
| Ubuntu | — | Upgrade linux-image-6.11.0-1014-raspiUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-oem-24.04bUpgrade linux-image-virtualUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-6.14.0-22-genericUpgrade linux-image-6.14.0-1004-realtimeUpgrade linux-image-6.11.0-1018-azureUpgrade linux-image-awsUpgrade linux-image-6.11.0-1016-gcp-64kUpgrade linux-image-6.11.0-28-generic-64kUpgrade linux-image-lowlatency-64k-6.11Upgrade linux-image-oracleUpgrade linux-image-aws-64kUpgrade linux-image-oracle-64kUpgrade linux-image-6.14.0-1007-azure-fdeUpgrade linux-image-6.14.0-1008-gcp-64kUpgrade linux-image-gcpUpgrade linux-image-6.14.0-1007-azureUpgrade linux-image-realtimeUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-6.14.0-1007-oracleUpgrade linux-image-6.11.0-1015-lowlatencyUpgrade linux-image-6.14.0-1007-oracle-64kUpgrade linux-image-6.14.0-1007-aws-64kUpgrade linux-image-lowlatency-hwe-24.04Upgrade linux-image-genericUpgrade linux-image-lowlatency-6.11Upgrade linux-image-azure-fdeUpgrade linux-image-azure-6.11Upgrade linux-image-6.11.0-1017-oracle-64kUpgrade linux-image-gcp-64kUpgrade linux-image-lowlatency-64k-hwe-24.04Upgrade linux-image-raspiUpgrade linux-image-6.11.0-1015-lowlatency-64kUpgrade linux-image-6.14.0-1008-gcpUpgrade linux-image-generic-64kUpgrade linux-image-azureUpgrade linux-image-lowlatency-64kUpgrade linux-image-6.14.0-1007-raspiUpgrade linux-image-lowlatencyUpgrade linux-image-azure-fde-edgeUpgrade linux-image-6.14.0-1007-awsUpgrade linux-image-azure-fde-6.11Upgrade linux-image-6.11.0-1018-azure-fdeUpgrade linux-image-6.11.0-1017-oracleUpgrade linux-image-6.11.0-28-genericUpgrade linux-image-6.11.0-1015-awsUpgrade linux-image-6.11.0-1024-oemUpgrade linux-image-6.14.0-22-generic-64kUpgrade linux-image-6.11.0-1011-realtimeUpgrade linux-image-6.11.0-1016-gcp | Jun 26, 2025 | Apr 18, 2025 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub