CVE-2026-53399
published 2026-07-19CVE-2026-53399: In the Linux kernel, the following vulnerability has been resolved: nfsd: release layout stid on setlease failure nfs4_alloc_stid() publishes the new stid into…
PriorityP345critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.54%
44.3th percentile
In the Linux kernel, the following vulnerability has been resolved:
nfsd: release layout stid on setlease failure
nfs4_alloc_stid() publishes the new stid into cl->cl_stateids via
idr_alloc_cyclic() under cl_lock before returning to
nfsd4_alloc_layout_stateid(). When nfsd4_layout_setlease() then
fails, the error path frees the layout stateid directly with
kmem_cache_free() without ever calling idr_remove(), leaving the
IDR slot pointing at freed slab memory. Any subsequent IDR walker
(states_show, client teardown) dereferences the dangling pointer.
The correct teardown for an IDR-published stid is nfs4_put_stid(),
which removes the IDR slot under cl_lock, dispatches sc_free
(nfsd4_free_layout_stateid) to release ls->ls_file via
nfsd4_close_layout(), and drops the nfs4_file reference in its
tail.
A second issue blocks that switch: nfsd4_free_layout_stateid()
unconditionally inspects ls->ls_fence_work via
delayed_work_pending() under ls_lock, but
INIT_DELAYED_WORK(&ls->ls_fence_work, ...) currently runs only
after the setlease call. On the setlease-failure path the
destructor would touch an uninitialized delayed_work.
nfsd4_alloc_layout_stateid()
nfs4_alloc_stid() /* idr_alloc_cyclic under cl_lock */
nfsd4_layout_setlease() /* fails */
nfs4_put_stid()
nfsd4_free_layout_stateid()
delayed_work_pending(&ls->ls_fence_work) /* needs INIT */
nfsd4_close_layout() /* nfsd_file_put(ls->ls_file) */
put_nfs4_file()
Fix by hoisting the ls_fenced / ls_fence_delay / INIT_DELAYED_WORK
initialization above the nfsd4_layout_setlease() call, and replace
the manual nfsd_file_put + put_nfs4_file + kmem_cache_free cleanup
with a single nfs4_put_stid(stp).
Affected
56 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= c5c707f96fc9a6e5a57ca5baac892673270abe3d < d788ef40a7517d22c97ab01700e4ae4c611b6f2f | d788ef40a7517d22c97ab01700e4ae4c611b6f2f |
| linux | linux | >= c5c707f96fc9a6e5a57ca5baac892673270abe3d < 2e0a5d6d62600b8c614d1b55e50ef94035d6adf9 | 2e0a5d6d62600b8c614d1b55e50ef94035d6adf9 |
| linux | linux | >= c5c707f96fc9a6e5a57ca5baac892673270abe3d < 7bbb7ce74051c8be4b69ff44ce3db370600dae61 | 7bbb7ce74051c8be4b69ff44ce3db370600dae61 |
| linux | linux | >= c5c707f96fc9a6e5a57ca5baac892673270abe3d < 48a586e382e4db1dbf958d44b63e081df5f8ed04 | 48a586e382e4db1dbf958d44b63e081df5f8ed04 |
| linux | linux | >= c5c707f96fc9a6e5a57ca5baac892673270abe3d < d369e5edfaaf83a448016e2f1da392b2174be801 | d369e5edfaaf83a448016e2f1da392b2174be801 |
| linux | linux | >= c5c707f96fc9a6e5a57ca5baac892673270abe3d < 8dee7c278f1c2b5bb80e17a6281c3812fc8b0cdd | 8dee7c278f1c2b5bb80e17a6281c3812fc8b0cdd |
| linux | linux | >= c5c707f96fc9a6e5a57ca5baac892673270abe3d < 83c2b7797742339bb768f83935f7ca33950db138 | 83c2b7797742339bb768f83935f7ca33950db138 |
| linux | linux | >= c5c707f96fc9a6e5a57ca5baac892673270abe3d < 30d55c8aabb261bc3f427d6b9aae7ef6206063f9 | 30d55c8aabb261bc3f427d6b9aae7ef6206063f9 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 4.0 < 5.10.261 | 5.10.261 |
| linux | linux_kernel | >= 5.11 < 5.15.212 | 5.15.212 |
| linux | linux_kernel | >= 5.16 < 6.1.178 | 6.1.178 |
| linux | linux_kernel | >= 6.13 < 6.18.39 | 6.18.39 |
| linux | linux_kernel | >= 6.19 < 7.1.3 | 7.1.3 |
| linux | linux_kernel | >= 6.2 < 6.6.145 | 6.6.145 |
| linux | linux_kernel | >= 6.7 < 6.12.96 | 6.12.96 |
| ubuntu | linux | — | — |
| ubuntu | linux-aws | — | — |
| ubuntu | linux-aws-5.15 | — | — |
| ubuntu | linux-aws-7.0 | — | — |
| ubuntu | linux-aws-fips | — | — |
| ubuntu | linux-azure | — | — |
| ubuntu | linux-azure-5.15 | — | — |
| ubuntu | linux-azure-7.0 | — | — |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vendor_redhat9.8CRITICAL
vendor_ubuntu9.1CRITICAL
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An attacker could possibly use these to compromise the system.
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Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)
It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation cache. A local attacker could possibly
use this issue to corrupt instructions executed at a higher privilege
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It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)
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An attacker could possibly use these to compromise the system.
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- ARM64 architecture;
- User-space API (UAPI);
- Kernel build system;
- ARM32 architecture;
- RISC-V architecture;
- S390 architecture;
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An attacker could possibly use these to compromise the system.
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Red Hat
kernel: nfsd: release layout stid on setlease failure
vendor_redhat·2026-07-19·CVSS 9.8
CVE-2026-53399 [CRITICAL] CWE-825 kernel: nfsd: release layout stid on setlease failure
kernel: nfsd: release layout stid on setlease failure
In the Linux kernel, the following vulnerability has been resolved:
nfsd: release layout stid on setlease failure
nfs4_alloc_stid() publishes the new stid into cl->cl_stateids via
idr_alloc_cyclic() under cl_lock before returning to
nfsd4_alloc_layout_stateid(). When nfsd4_layout_setlease() then
fails, the error path frees the layout stateid directly with
kmem_cache_free() without ever calling idr_remove(), leaving the
IDR slot pointing at freed slab memory. Any subsequent IDR walker
(states_show, client teardown) dereferences the dangling pointer.
The correct teardown for an IDR-published stid is nfs4_put_stid(),
which removes the IDR slot under cl_lock, dispatches sc_free
(nfsd4_free_layout_stateid) to release ls->ls_file via
nfsd4_c
GHSA
In the Linux kernel, the following vulnerability has been resolved: nfsd: release layout stid on setlease failure nfs4_alloc_stid() publishes the new stid into cl->cl_stateids via idr_alloc_cyclic()
ghsa_unreviewed·2026-07-19
CVE-2026-53399 [CRITICAL] In the Linux kernel, the following vulnerability has been resolved: nfsd: release layout stid on setlease failure nfs4_alloc_stid() publishes the new stid into cl->cl_stateids via idr_alloc_cyclic()
In the Linux kernel, the following vulnerability has been resolved:
nfsd: release layout stid on setlease failure
nfs4_alloc_stid() publishes the new stid into cl->cl_stateids via
idr_alloc_cyclic() under cl_lock before returning to
nfsd4_alloc_layout_stateid(). When nfsd4_layout_setlease() then
fails, the error path frees the layout stateid directly with
kmem_cache_free() without ever calling idr_remove(), leaving the
IDR slot pointing at freed slab memory. Any subsequent IDR walker
(states_show, client teardown) dereferences the dangling pointer.
The correct teardown for an IDR-published stid is nfs4_put_stid(),
which removes the IDR slot under cl_lock, dispatches sc_free
(nfsd4_free_layout_stateid) to release ls->ls_file via
nfsd4_close_layout(), and drops the nfs4_file reference in
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/2e0a5d6d62600b8c614d1b55e50ef94035d6adf9https://git.kernel.org/stable/c/30d55c8aabb261bc3f427d6b9aae7ef6206063f9https://git.kernel.org/stable/c/48a586e382e4db1dbf958d44b63e081df5f8ed04https://git.kernel.org/stable/c/7bbb7ce74051c8be4b69ff44ce3db370600dae61https://git.kernel.org/stable/c/83c2b7797742339bb768f83935f7ca33950db138https://git.kernel.org/stable/c/8dee7c278f1c2b5bb80e17a6281c3812fc8b0cddhttps://git.kernel.org/stable/c/d369e5edfaaf83a448016e2f1da392b2174be801https://git.kernel.org/stable/c/d788ef40a7517d22c97ab01700e4ae4c611b6f2f
2026-07-19
Published