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Echo: linux: security update to 6.5.13-1

medium Tenable Self-Hosted Container Security Plugin ID 459833

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: riscv: VMAP_STACK overflow detection
 thread-safe commit 31da94c25aea ("riscv: add VMAP_STACK overflow detection") added support for
 CONFIG_VMAP_STACK. If overflow is detected, CPU switches to `shadow_stack` temporarily before switching
 finally to per-cpu `overflow_stack`. If two CPUs/harts are racing and end up in over flowing kernel stack,
 one or both will end up corrupting each other state because `shadow_stack` is not per-cpu. This patch
 optimizes per-cpu overflow stack switch by directly picking per-cpu `overflow_stack` and gets rid of
 `shadow_stack`. Following are the changes in this patch - Defines an asm macro to obtain per-cpu symbols
 in destination register. - In entry.S, when overflow is detected, per-cpu overflow stack is located using
 per-cpu asm macro. Computing per-cpu symbol requires a temporary register. x31 is saved away into
 CSR_SCRATCH (CSR_SCRATCH is anyways zero since we're in kernel). Please see Links for additional relevant
 disccussion and alternative solution. Tested by `echo EXHAUST_STACK > /sys/kernel/debug/provoke-
 crash/DIRECT` Kernel crash log below Insufficient stack space to handle exception!/debug/provoke-
 crash/DIRECT Task stack: [0xff20000010a98000..0xff20000010a9c000] Overflow stack:
 [0xff600001f7d98370..0xff600001f7d99370] CPU: 1 PID: 205 Comm: bash Not tainted
 6.1.0-rc2-00001-g328a1f96f7b9 #34 Hardware name: riscv-virtio,qemu (DT) epc : __memset+0x60/0xfc ra :
 recursive_loop+0x48/0xc6 [lkdtm] epc : ffffffff808de0e4 ra : ffffffff0163a752 sp : ff20000010a97e80 gp :
 ffffffff815c0330 tp : ff600000820ea280 t0 : ff20000010a97e88 t1 : 000000000000002e t2 : 3233206874706564
 s0 : ff20000010a982b0 s1 : 0000000000000012 a0 : ff20000010a97e88 a1 : 0000000000000000 a2 :
 0000000000000400 a3 : ff20000010a98288 a4 : 0000000000000000 a5 : 0000000000000000 a6 : fffffffffffe43f0
 a7 : 00007fffffffffff s2 : ff20000010a97e88 s3 : ffffffff01644680 s4 : ff20000010a9be90 s5 :
 ff600000842ba6c0 s6 : 00aaaaaac29e42b0 s7 : 00fffffff0aa3684 s8 : 00aaaaaac2978040 s9 : 0000000000000065
 s10: 00ffffff8a7cad10 s11: 00ffffff8a76a4e0 t3 : ffffffff815dbaf4 t4 : ffffffff815dbaf4 t5 :
 ffffffff815dbab8 t6 : ff20000010a9bb48 status: 0000000200000120 badaddr: ff20000010a97e88 cause:
 000000000000000f Kernel panic - not syncing: Kernel stack overflow CPU: 1 PID: 205 Comm: bash Not tainted
 6.1.0-rc2-00001-g328a1f96f7b9 #34 Hardware name: riscv-virtio,qemu (DT) Call Trace: [<ffffffff80006754>]
 dump_backtrace+0x30/0x38 [<ffffffff808de798>] show_stack+0x40/0x4c [<ffffffff808ea2a8>]
 dump_stack_lvl+0x44/0x5c [<ffffffff808ea2d8>] dump_stack+0x18/0x20 [<ffffffff808dec06>] panic+0x126/0x2fe
 [<ffffffff800065ea>] walk_stackframe+0x0/0xf0 [<ffffffff0163a752>] recursive_loop+0x48/0xc6 [lkdtm] SMP:
 stopping secondary CPUs ---[ end Kernel panic - not syncing: Kernel stack overflow ]--- (CVE-2023-52761)

Solution

Update the linux library and its related packages to version 6.5.13-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2023-52761

Plugin Details

Severity: Medium

ID: 459833

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-2023-52761

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: 5/21/2024

Reference Information

CVE: CVE-2023-52761