FKIE_CVE-2026-33790
Vulnerability from fkie_nvd - Published: 2026-04-09 22:16 - Updated: 2026-04-17 17:11
Severity
Summary
An Improper Check for Unusual or Exceptional Conditions vulnerability in the flow daemon (flowd) of Juniper Networks Junos OS on SRX Series allows an attacker sending a specific, malformed ICMPv6 packet to cause the srxpfe process to crash and restart. Continued receipt and processing of these packets will repeatedly crash the srxpfe process and sustain the Denial of Service (DoS) condition.
During NAT64 translation, receipt of a specific, malformed ICMPv6 packet destined to the device will cause the srxpfe process to crash and restart.
This issue cannot be triggered using IPv4 nor other IPv6 traffic.
This issue affects Junos OS on SRX Series:
* all versions before 21.2R3-S10,
* all versions of 21.3,
* from 21.4 before 21.4R3-S12,
* all versions of 22.1,
* from 22.2 before 22.2R3-S8,
* all versions of 22.4,
* from 22.4 before 22.4R3-S9,
* from 23.2 before 23.2R2-S6,
* from 23.4 before 23.4R2-S7,
* from 24.2 before 24.2R2-S3,
* from 24.4 before 24.4R2-S3,
* from 25.2 before 25.2R1-S2, 25.2R2.
References
| URL | Tags | ||
|---|---|---|---|
| sirt@juniper.net | https://kb.juniper.net/JSA107874 | Vendor Advisory |
Impacted products
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"value": "An Improper Check for Unusual or Exceptional Conditions vulnerability in the flow daemon (flowd) of Juniper Networks Junos OS on SRX Series allows an attacker sending a specific, malformed ICMPv6 packet to cause the srxpfe process to crash and restart.\u00a0Continued receipt and processing of these packets will repeatedly crash the srxpfe process and sustain the Denial of Service (DoS) condition.\n\nDuring NAT64 translation, receipt of a specific, malformed ICMPv6 packet destined to the device will cause the srxpfe process to crash and restart.\n\nThis issue cannot be triggered using IPv4 nor other IPv6 traffic.\n\n\n\nThis issue affects Junos OS on SRX Series:\n * all versions before 21.2R3-S10,\n * all versions of 21.3,\n * from 21.4 before 21.4R3-S12,\n * all versions of 22.1,\n * from 22.2 before 22.2R3-S8,\n * all versions of 22.4,\n * from 22.4 before 22.4R3-S9,\n * from 23.2 before 23.2R2-S6,\n * from 23.4 before 23.4R2-S7,\n * from 24.2 before 24.2R2-S3,\n * from 24.4 before 24.4R2-S3,\n * from 25.2 before 25.2R1-S2, 25.2R2."
}
],
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"lastModified": "2026-04-17T17:11:49.497",
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}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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