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    <lastBuildDate>Mon, 05 Oct 2026 09:01:11 +0000</lastBuildDate>
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      <title>CVE-2022-22209 — Junos OS: RIB and PFEs can get out of sync due to a memory leak caused by interface flaps or route churn</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2022-22209</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Juniper Networks Junos OS&lt;/p&gt;
&lt;p&gt;A Missing Release of Memory after Effective Lifetime vulnerability in the kernel of Juniper Networks Junos OS allows an unauthenticated network based attacker to cause a Denial of Service (DoS). On all Junos platforms, the Kernel Routing Table (KRT) queue can get stuck due to a memory leak triggered by interface flaps or route churn leading to RIB and PFEs getting out of sync. The memory leak causes RTNEXTHOP/route and next-hop memory pressure issue and the KRT queue will eventually get stuck with the error- &amp;#39;ENOMEM -- Cannot allocate memory&amp;#39;. The out-of-sync state between RIB and FIB can be seen with the &amp;#34;show route&amp;#34; and &amp;#34;show route forwarding-table&amp;#34; command. This issue will lead to failures for adding new routes. The KRT queue status can be checked using the CLI command &amp;#34;show krt queue&amp;#34;: user@host &amp;gt; show krt state High-priority add queue: 1 queued ADD nhtype Router index 0 (31212) error &amp;#39;ENOMEM -- Cannot allocate memory&amp;#39; kqp &amp;#39;0x8ad5e40&amp;#39; The following messages will be observed in /var/log/messages, which indicate high memory for routes/nexthops: host rpd[16279]: RPD_RT_HWM_NOTICE: New RIB highwatermark for routes: 266 [2022-03-04 05:06:07] host rpd[16279]: RPD_KRT_Q_RETRIES: nexthop ADD: Cannot allocate memory host rpd[16279]: RPD_KRT_Q_RETRIES: nexthop ADD: Cannot allocate memory host kernel: rts_veto_net_delayed_unref_limit: Route/nexthop memory is severe pressure. User Application to perform recovery actions. O p 8 err 12, rtsm_id 0:-1, msg type 10, veto simulation: 0. h…&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Juniper Networks Junos OS&lt;/p&gt;
&lt;p&gt;A Missing Release of Memory after Effective Lifetime vulnerability in the kernel of Juniper Networks Junos OS allows an unauthenticated network based attacker to cause a Denial of Service (DoS). On all Junos platforms, the Kernel Routing Table (KRT) queue can get stuck due to a memory leak triggered by interface flaps or route churn leading to RIB and PFEs getting out of sync. The memory leak causes RTNEXTHOP/route and next-hop memory pressure issue and the KRT queue will eventually get stuck with the error- &amp;#39;ENOMEM -- Cannot allocate memory&amp;#39;. The out-of-sync state between RIB and FIB can be seen with the &amp;#34;show route&amp;#34; and &amp;#34;show route forwarding-table&amp;#34; command. This issue will lead to failures for adding new routes. The KRT queue status can be checked using the CLI command &amp;#34;show krt queue&amp;#34;: user@host &amp;gt; show krt state High-priority add queue: 1 queued ADD nhtype Router index 0 (31212) error &amp;#39;ENOMEM -- Cannot allocate memory&amp;#39; kqp &amp;#39;0x8ad5e40&amp;#39; The following messages will be observed in /var/log/messages, which indicate high memory for routes/nexthops: host rpd[16279]: RPD_RT_HWM_NOTICE: New RIB highwatermark for routes: 266 [2022-03-04 05:06:07] host rpd[16279]: RPD_KRT_Q_RETRIES: nexthop ADD: Cannot allocate memory host rpd[16279]: RPD_KRT_Q_RETRIES: nexthop ADD: Cannot allocate memory host kernel: rts_veto_net_delayed_unref_limit: Route/nexthop memory is severe pressure. User Application to perform recovery actions. O p 8 err 12, rtsm_id 0:-1, msg type 10, veto simulation: 0. h…&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://cve.radiocsirt.org/vuln/cve-2022-22209</guid>
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