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Echo: linux: security update to 6.1.135-1

medium Tenable Self-Hosted Container Security Plugin ID 463367

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - In the Linux kernel, the following vulnerability has been resolved: nfsd: decrease sc_count directly if
 fail to queue dl_recall A deadlock warning occurred when invoking nfs4_put_stid following a failed
 dl_recall queue operation: T1 T2 nfs4_laundromat nfs4_get_client_reaplist nfs4_anylock_blockers
 __break_lease spin_lock // ctx->flc_lock spin_lock // clp->cl_lock nfs4_lockowner_has_blockers
 locks_owner_has_blockers spin_lock // flctx->flc_lock nfsd_break_deleg_cb nfsd_break_one_deleg
 nfs4_put_stid refcount_dec_and_lock spin_lock // clp->cl_lock When a file is opened, an nfs4_delegation is
 allocated with sc_count initialized to 1, and the file_lease holds a reference to the delegation. The
 file_lease is then associated with the file through kernel_setlease. The disassociation is performed in
 nfsd4_delegreturn via the following call chain: nfsd4_delegreturn --> destroy_delegation -->
 destroy_unhashed_deleg --> nfs4_unlock_deleg_lease --> kernel_setlease --> generic_delete_lease The
 corresponding sc_count reference will be released after this disassociation. Since nfsd_break_one_deleg
 executes while holding the flc_lock, the disassociation process becomes blocked when attempting to acquire
 flc_lock in generic_delete_lease. This means: 1) sc_count in nfsd_break_one_deleg will not be decremented
 to 0; 2) The nfs4_put_stid called by nfsd_break_one_deleg will not attempt to acquire cl_lock; 3)
 Consequently, no deadlock condition is created. Given that sc_count in nfsd_break_one_deleg remains non-
 zero, we can safely perform refcount_dec on sc_count directly. This approach effectively avoids triggering
 deadlock warnings. (CVE-2025-37871)

Solution

Update the linux library and its related packages to version 6.1.135-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2025-37871

Plugin Details

Severity: Medium

ID: 463367

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.18

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C

CVSS Score Source: CVE-2025-37871

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/15/2025

Vulnerability Publication Date: 5/9/2025

Reference Information

CVE: CVE-2025-37871