CVE-2026-21911
Gravedad CVSS v4.0:
ALTA
Tipo:
No Disponible / Otro tipo
Fecha de publicación:
15/01/2026
Última modificación:
15/01/2026
Descripción
*** Pendiente de traducción *** An Incorrect Calculation vulnerability in the Layer 2 Control<br />
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Protocol <br />
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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.<br />
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When the issue is seen, the following log message will be generated:<br />
<br />
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, <br />
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<br />
This issue affects Junos OS Evolved: <br />
<br />
* all versions before 21.4R3-S7-EVO, <br />
* from 22.2 before 22.2R3-S4-EVO, <br />
* from 22.3 before 22.3R3-S3-EVO, <br />
* from 22.4 before 22.4R3-S2-EVO, <br />
* from 23.2 before 23.2R2-S1-EVO, <br />
* from 23.4 before 23.4R1-S2-EVO, 23.4R2-EVO.
Impacto
Puntuación base 4.0
7.10
Gravedad 4.0
ALTA
Puntuación base 3.x
6.50
Gravedad 3.x
MEDIA