CVE-2026-57027MEDIUM· 6.5MITRENVD대응게시일: 2026. 07. 09.수정일: 2026. 07. 13.CNA: sirt@juniper.netAnalyzed

A Missing Release of Memory after Effective Lifetime vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS on spe

위협 신호 · CVSS · EPSS · KEV

정기 패치· 높은 악용 신호 없음

CVSS

6.5medium

이론적 심각도 점수

EPSS

0.2%상위 93.9%

30일 내 악용 확률 예측

KEV

미등재

실측 악용 기록 없음

권장 대응 기한60일 이내CISA SSVC 기준

계획된 패치 주기 내 조치(60일 이내)

외부 노출· KEV 미등재 · 자동화 어려움 · 부분 영향 · 외부 노출

CVSS 벡터 · 메트릭

악용 경로

공격 벡터인접

공격 복잡도낮음

필요 권한불필요

사용자 상호작용불필요

범위불변

영향

기밀성 영향없음

무결성 영향없음

가용성 영향높음

버전별 점수

CVSS 4.07.1HIGH· 악용성숙도 NOT_DEFINED

CVSS 3.16.5MEDIUM· 악용성 2.8· 영향도 3.6

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

약점 (CWE)

CWE-401

상세 설명

A Missing Release of Memory after Effective Lifetime vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS on specific EX Series devices allows an unauthenticated adjacent attacker to cause a Denial-of-Service (DoS).When sFlow is configured in a Virtual Chassis (VC) scenario with EX4100 Series or EX4400 Series devices, multicast traffic which is received on one VC member and sent out on another member leads to a memory leak and ultimately an FPC crash and restart.

The leak can be monitored by watching the continuous increase of the buffer values in the output of:

user@host> show chassis fpc
This issue affects Junos OS on EX4100 Series and EX4400:

all versions before 23.2R2-S7,
23.4 versions before 23.4R2-S7,
24.2 versions before 24.2R2-S4,
24.4 versions before 24.4R2.

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영향받는 제품·버전

juniper junos< 23.2
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juniper ex4100
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juniper ex4100-f
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juniper ex4100-h
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juniper ex4100-h-12t
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juniper ex4400
other

영향받는 구성 (CPE) 40

juniper junos< 23.2cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:-:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r1:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r1-s1:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r1-s2:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r2:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r2-s1:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r2-s2:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r2-s3:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r2-s4:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r2-s5:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r2-s6:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:-:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r1:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r1-s1:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r1-s2:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r2:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r2-s1:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r2-s2:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r2-s3:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r2-s4:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r2-s5:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r2-s6:*:*:*:*:*:*
juniper junos 24.2cpe:2.3:o:juniper:junos:24.2:-:*:*:*:*:*:*
juniper junos 24.2cpe:2.3:o:juniper:junos:24.2:r1:*:*:*:*:*:*
juniper junos 24.2cpe:2.3:o:juniper:junos:24.2:r1-s1:*:*:*:*:*:*
juniper junos 24.2cpe:2.3:o:juniper:junos:24.2:r1-s2:*:*:*:*:*:*
juniper junos 24.2cpe:2.3:o:juniper:junos:24.2:r2:*:*:*:*:*:*
juniper junos 24.2cpe:2.3:o:juniper:junos:24.2:r2-s1:*:*:*:*:*:*
juniper junos 24.2cpe:2.3:o:juniper:junos:24.2:r2-s2:*:*:*:*:*:*
juniper junos 24.2cpe:2.3:o:juniper:junos:24.2:r2-s3:*:*:*:*:*:*
juniper junos 24.4cpe:2.3:o:juniper:junos:24.4:-:*:*:*:*:*:*
juniper junos 24.4cpe:2.3:o:juniper:junos:24.4:r1:*:*:*:*:*:*
juniper junos 24.4cpe:2.3:o:juniper:junos:24.4:r1-s2:*:*:*:*:*:*
juniper junos 24.4cpe:2.3:o:juniper:junos:24.4:r1-s3:*:*:*:*:*:*
juniper ex4100cpe:2.3:h:juniper:ex4100:-:*:*:*:*:*:*:*
juniper ex4100-fcpe:2.3:h:juniper:ex4100-f:-:*:*:*:*:*:*:*
juniper ex4100-hcpe:2.3:h:juniper:ex4100-h:-:*:*:*:*:*:*:*
juniper ex4100-h-12tcpe:2.3:h:juniper:ex4100-h-12t:-:*:*:*:*:*:*:*
juniper ex4400cpe:2.3:h:juniper:ex4400:-:*:*:*:*:*:*:*

참고 자료 1

https://supportportal.juniper.net/JSA110087
Vendor Advisory

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