CVE-2026-21911

Опубликовано: 15 янв. 2026

Источник: nvd

CVSS3: 6.5

EPSS Низкий

Описание

An Incorrect Calculation vulnerability in the Layer 2 Control

Protocol

Daemon (l2cpd) of Juniper Networks Junos OS Evolved allows an unauthenticated network-adjacent attacker flapping the management interface to cause the learning of new MACs over label-switched interfaces (LSI) to stop while generating a flood of logs, resulting in high CPU usage.

When the issue is seen, the following log message will be generated:

op:1 flag:0x6 mac:xx:xx:xx:xx:xx:xx bd:2 ifl:13302 reason:0(REASON_NONE) i-op:6(INTRNL_OP_HW_FORCE_DELETE) status:10 lstatus:10 err:26(GETIFBD_VALIDATE_FAILED) err-reason 4(IFBD_VALIDATE_FAIL_EPOCH_MISMATCH) hw_wr:0x4 ctxsync:0 fwdsync:0 rtt-id:51 p_ifl:0 fwd_nh:0 svlbnh:0 event:- smask:0x100000000 dmask:0x0 mplsmask 0x1 act:0x5800 extf:0x0 pfe-id 0 hw-notif-ifl 13302 programmed-ifl 4294967295 pseudo-vtep underlay-ifl-idx 0 stack:GET_MAC, ALLOCATE_MAC, GET_IFL, GET_IFF, GET_IFBD, STOP,

This issue affects Junos OS Evolved:

all versions before 21.4R3-S7-EV

Ссылки

https://kb.juniper.net/JSA106010
Vendor Advisory
https://supportportal.juniper.net/JSA106010
Vendor Advisory

Уязвимые конфигурации

Конфигурация 1

Одно из

cpe:2.3:o:juniper:junos_os_evolved:*:*:*:*:*:*:*:*

Версия до 21.4 (исключая)

cpe:2.3:o:juniper:junos_os_evolved:21.4:-:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:21.4:r1:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:21.4:r1-s1:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:21.4:r1-s2:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:21.4:r2:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:21.4:r2-s1:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:21.4:r2-s2:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:21.4:r3:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s1:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s2:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s3:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s4:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s5:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s6:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.2:-:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.2:r1:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.2:r1-s1:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.2:r1-s2:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.2:r2:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.2:r2-s1:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.2:r2-s2:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.2:r3:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.2:r3-s1:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.2:r3-s2:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.2:r3-s3:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.3:-:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.3:r1:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.3:r1-s1:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.3:r1-s2:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.3:r2:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.3:r2-s1:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.3:r2-s2:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.3:r3:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.3:r3-s1:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.3:r3-s2:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.4:-:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.4:r1:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.4:r1-s1:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.4:r1-s2:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.4:r2:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.4:r2-s1:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.4:r2-s2:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.4:r3:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:22.4:r3-s1:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:23.2:-:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:23.2:r1:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:23.2:r1-s1:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:23.2:r1-s2:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:23.2:r2:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:23.4:-:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:23.4:r1:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:23.4:r1-s1:*:*:*:*:*:*

cpe:2.3:o:juniper:junos_os_evolved:23.4:r2:*:*:*:*:*:*

EPSS

Процентиль: 4%

0.0002

Низкий

6.5 Medium

CVSS3

Дефекты

CWE-682

Связанные уязвимости

GHSA-6fvr-r66p-5w4v

CVSS3: 6.5

github

23 дня назад

An Incorrect Calculation vulnerability in the Layer 2 Control Protocol Daemon (l2cpd) of Juniper Networks Junos OS Evolved allows an unauthenticated network-adjacent attacker flapping the management interface to cause the learning of new MACs over label-switched interfaces (LSI) to stop while generating a flood of logs, resulting in high CPU usage. When the issue is seen, the following log message will be generated: op:1 flag:0x6 mac:xx:xx:xx:xx:xx:xx bd:2 ifl:13302 reason:0(REASON_NONE) i-op:6(INTRNL_OP_HW_FORCE_DELETE) status:10 lstatus:10 err:26(GETIFBD_VALIDATE_FAILED) err-reason 4(IFBD_VALIDATE_FAIL_EPOCH_MISMATCH) hw_wr:0x4 ctxsync:0 fwdsync:0 rtt-id:51 p_ifl:0 fwd_nh:0 svlbnh:0 event:- smask:0x100000000 dmask:0x0 mplsmask 0x1 act:0x5800 extf:0x0 pfe-id 0 hw-notif-ifl 13302 programmed-ifl 4294967295 pseudo-vtep underlay-ifl-idx 0 stack:GET_MAC, ALLOCATE_MAC, GET_IFL, GET_IFF, GET_IFBD, STOP, This issue affects Junos OS Evolved: * all versions before 21.4R3-S7...

EPSS

Процентиль: 4%

0.0002

Низкий

6.5 Medium

CVSS3

Дефекты

CWE-682