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NVD / CVE Program· CNA Linux

CVE-2025-38400: nfs: Clean up /proc/net/rpc/nfs when nfs_fs_proc_net_init() fails.

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.22% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 3c94212b57bedec3a386ef3da1ef00602f5c3d1d, 412534a1fb76958b88dca48360c6f3ad4f3390f4, 5.10.240; cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0 5.15.200.1-1.

Low priority for now. Upgrade to Linux Linux 3c94212b57bedec3a386ef3da1ef00602f5c3d1d, 412534a1fb76958b88dca48360c6f3ad4f3390f4, 5.10.240; cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0 5.15.200.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: nfs: Clean up /proc/net/rpc/nfs when nfs_fs_proc_net_init() fails. syzbot reported a warning below [1] following a fault injection in nfs_fs_proc_net_init(). [0] When nfs_fs_proc_net_init() fails, /proc/net/rpc/nfs is not removed. Later, rpc_proc_exit() tries to remove /proc/net/rpc, and the warning is logged as the directory is not empty. Let's handle the error of nfs_fs_proc_net_init() properly. [0]: FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 UID: 0 PID: 6120 Comm: syz.2.27 Not tainted 6.16.0-rc1-syzkaller-00010-g2c4a1f3fe03e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: <TASK> dump_stack_lvl (lib/dump_stack.c:123) should_fail_ex (lib/fault-inject.c:73 lib/fault-inject.c:174) should_failslab (mm/failslab.c:46) kmem_cache_alloc_noprof (mm/slub.c:4178 mm/slub.c:4204) __proc_create (fs/proc/generic.c:427) proc_create_reg (fs/proc/generic.c:554) proc_create_net_data (fs/proc/proc_net.c:120) nfs_fs_proc_net_init (fs/nfs/client.c:1409) nfs_net_init (fs/nfs/inode.c:2600) ops_init (net/core/net_namespace.c:138) setup_net (net/core/net_namespace.c:443) copy_net_ns (net/core/net_namespace.c:576) create_new_namespaces (kernel/nsproxy.c:110) unshare_nsproxy_namespaces (kernel/nsproxy.c:218 (discriminator 4)) ksys_unshare (kernel/fork.c:3123) __x64_sys_unshare (kernel/fork.c:3190) do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) </TASK> [1]: remove_proc_entry: removing non-empty directory 'net/rpc', leaking at least 'nfs' WARNING: CPU: 1 PID: 6120 at fs/proc/generic.c:727 remove_proc_entry+0x45e/0x530 fs/proc/generic.c:727 Modules linked in: CPU: 1 UID: 0 PID: 6120 Comm: syz.2.27 Not tainted 6.16.0-rc1-syzkaller-00010-g2c4a1f3fe03e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:remove_proc_entry+0x45e/0x530 fs/proc/generic.c:727 Code: 3c 02 00 0f 85 85 00 00 00 48 8b 93 d8 00 00 00 4d 89 f0 4c 89 e9 48 c7 c6 40 ba a2 8b 48 c7 c7 60 b9 a2 8b e8 33 81 1d ff 90 <0f> 0b 90 90 e9 5f fe ff ff e8 04 69 5e ff 90 48 b8 00 00 00 00 00 RSP: 0018:ffffc90003637b08 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff88805f534140 RCX: ffffffff817a92c8 RDX: ffff88807da99e00 RSI: ffffffff817a92d5 RDI: 0000000000000001 RBP: ffff888033431ac0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffff888033431a00 R13: ffff888033431ae4 R14: ffff888033184724 R15: dffffc0000000000 FS: 0000555580328500(0000) GS:ffff888124a62000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f71733743e0 CR3: 000000007f618000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> sunrpc_exit_net+0x46/0x90 net/sunrpc/sunrpc_syms.c:76 ops_exit_list net/core/net_namespace.c:200 [inline] ops_undo_list+0x2eb/0xab0 net/core/net_namespace.c:253 setup_net+0x2e1/0x510 net/core/net_namespace.c:457 copy_net_ns+0x2a6/0x5f0 net/core/net_namespace.c:574 create_new_namespaces+0x3ea/0xa90 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xc0/0x1f0 kernel/nsproxy.c:218 ksys_unshare+0x45b/0xa40 kernel/fork.c:3121 __do_sys_unshare kernel/fork.c:3192 [inline] __se_sys_unshare kernel/fork.c:3190 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:3190 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x490 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa1a6b8e929 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c ---truncated---

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jul 25, 2025
Updated
Nov 5, 2026
EPSS
0.2% · 13th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel
debiandebian linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux11.0
  • linux linux kernel5.10.217 and later · before 5.10.240
  • linux linux kernel5.15.159 and later · before 5.15.187
  • linux linux kernel6.1.91 and later · before 6.1.144
  • linux linux kernel5.4.276 and later · before 5.4.296
  • linux linux kernel6.8.10 and later · before 6.12.37
  • linux linux kernel6.13 and later · before 6.15.6
  • linux linux kernel6.6.31 and later · before 6.6.97
  • linux linux kernel6.16

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • e05194baae299f2148ab5f6bab659c6ce8d1f6d3, 6.9affected
    • 31dd0cda5aa0547de447aaf184812f85ccc34044 and later · before 8785701fd7cd52ae74c0d2b35b82568df74e9dbbaffected · git
    • 6eef21eb7a165601882dad0419a630e32d2d7a2c and later · before 412534a1fb76958b88dca48360c6f3ad4f3390f4affected · git
    • 0bbd429260821dfb81478749837d3e6377949ac6 and later · before b92397ce96743e4cc090207e2df2a856cb4cef08affected · git
    • 9dd86e9d34b1078dcd647220e96a205028bf4e6f and later · before 7701c245ff1ac1a126bf431e72b24547519046ffaffected · git
    • 53a0365c9f9f66e1a981bf9188d8716d682e0739 and later · before d0877c479f44fe475f4c8c02c88ce9ad43e90298affected · git
    • d47151b79e3220e72ae323b8b8e9d6da20dc884e and later · before 3c94212b57bedec3a386ef3da1ef00602f5c3d1daffected · git
    • d47151b79e3220e72ae323b8b8e9d6da20dc884e and later · before 6acf340f8c1d296bcf535986175f5d0d6f2aab09affected · git
    • d47151b79e3220e72ae323b8b8e9d6da20dc884e and later · before e8d6f3ab59468e230f3253efe5cb63efa35289f7affected · git
    • 5.4.276 and later · before 5.4.296affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:9kernelbefore 5.14.0-687.5.1.el9_85.14.0-687.5.1.el9_8
AlmaLinux:9kernel-64kbefore 5.14.0-687.5.1.el9_85.14.0-687.5.1.el9_8
AlmaLinux:9kernel-64k-corebefore 5.14.0-687.5.1.el9_85.14.0-687.5.1.el9_8
AlmaLinux:9kernel-64k-debugbefore 5.14.0-687.5.1.el9_85.14.0-687.5.1.el9_8
AlmaLinux:9kernel-64k-debug-corebefore 5.14.0-687.5.1.el9_85.14.0-687.5.1.el9_8
AlmaLinux:9kernel-64k-debug-develbefore 5.14.0-687.5.1.el9_85.14.0-687.5.1.el9_8
AlmaLinux:9kernel-64k-debug-devel-matchedbefore 5.14.0-687.5.1.el9_85.14.0-687.5.1.el9_8
AlmaLinux:9kernel-64k-debug-modulesbefore 5.14.0-687.5.1.el9_85.14.0-687.5.1.el9_8
AlmaLinux:9kernel-64k-debug-modules-corebefore 5.14.0-687.5.1.el9_85.14.0-687.5.1.el9_8
AlmaLinux:9kernel-64k-debug-modules-extrabefore 5.14.0-687.5.1.el9_85.14.0-687.5.1.el9_8
AlmaLinux:9kernel-64k-develbefore 5.14.0-687.5.1.el9_85.14.0-687.5.1.el9_8
AlmaLinux:9kernel-64k-devel-matchedbefore 5.14.0-687.5.1.el9_85.14.0-687.5.1.el9_8
AlmaLinux:9kernel-64k-modulesbefore 5.14.0-687.5.1.el9_85.14.0-687.5.1.el9_8
AlmaLinux:9kernel-64k-modules-corebefore 5.14.0-687.5.1.el9_85.14.0-687.5.1.el9_8
AlmaLinux:9kernel-64k-modules-extrabefore 5.14.0-687.5.1.el9_85.14.0-687.5.1.el9_8
AlmaLinux:9kernel-abi-stablelistsbefore 5.14.0-687.5.1.el9_85.14.0-687.5.1.el9_8
AlmaLinux:9kernel-corebefore 5.14.0-687.5.1.el9_85.14.0-687.5.1.el9_8
AlmaLinux:9kernel-cross-headersbefore 5.14.0-687.5.1.el9_85.14.0-687.5.1.el9_8
AlmaLinux:9kernel-debugbefore 5.14.0-687.5.1.el9_85.14.0-687.5.1.el9_8
AlmaLinux:9kernel-debug-corebefore 5.14.0-687.5.1.el9_85.14.0-687.5.1.el9_8
AlmaLinux:9kernel-debug-develbefore 5.14.0-687.5.1.el9_85.14.0-687.5.1.el9_8
AlmaLinux:9kernel-debug-devel-matchedbefore 5.14.0-687.5.1.el9_85.14.0-687.5.1.el9_8
AlmaLinux:9kernel-debug-modulesbefore 5.14.0-687.5.1.el9_85.14.0-687.5.1.el9_8
AlmaLinux:9kernel-debug-modules-corebefore 5.14.0-687.5.1.el9_85.14.0-687.5.1.el9_8

+96

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2025-38392Jul 25, 2025 · idpf: convert control queue mutex to a spinlock
    22Monitor
  • ← EarlierCVE-2025-38399Jul 25, 2025 · scsi: target: Fix NULL pointer dereference in core_scsi3_decode_spec_i_port()
    22Monitor
  • Later →CVE-2025-38402Jul 25, 2025 · idpf: return 0 size for RSS key if not supported
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux3c94212b57bedec3a386ef3da1ef00602f5c3d1dVendor (CNA)
Linux Linux412534a1fb76958b88dca48360c6f3ad4f3390f4Vendor (CNA)
Linux Linux5.10.240Vendor (CNA)
Linux Linux5.15.187Vendor (CNA)
Linux Linux5.4.296Vendor (CNA)
Linux Linux6.1.144Vendor (CNA)
Linux Linux6.6.97Vendor (CNA)
Linux Linux6.9Vendor (CNA)
Linux Linux6acf340f8c1d296bcf535986175f5d0d6f2aab09Vendor (CNA)
Linux Linux7701c245ff1ac1a126bf431e72b24547519046ffVendor (CNA)
Linux Linux8785701fd7cd52ae74c0d2b35b82568df74e9dbbVendor (CNA)
Linux Linuxb92397ce96743e4cc090207e2df2a856cb4cef08Vendor (CNA)
Linux Linuxd0877c479f44fe475f4c8c02c88ce9ad43e90298Vendor (CNA)
Linux Linuxe8d6f3ab59468e230f3253efe5cb63efa35289f7Vendor (CNA)
cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.05.15.200.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
almalinux:kernel5.14.0-687.5.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k5.14.0-687.5.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-core5.14.0-687.5.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug5.14.0-687.5.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-core5.14.0-687.5.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel5.14.0-687.5.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel-matched5.14.0-687.5.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules5.14.0-687.5.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-core5.14.0-687.5.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-extra5.14.0-687.5.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel5.14.0-687.5.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel-matched5.14.0-687.5.1.el9_8 · AlmaLinux:9Package registry (OSV)
debian:linux6.1.147-1 · Debian:12Package registry (OSV)
red hat:kernel-64k-debug-debuginfo0:5.14.0-687.5.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel0:5.14.0-687.5.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)

+10

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (10 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records