[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-DEBIAN-CVE-2025-38553":6},{"stargazers_count":4,"fetched_at":5},7,"2026-06-04T14:53:31.930Z",{"id":7,"descriptions":8,"cisa":9,"weaknesses":10,"exploits":11,"aliases":12,"duplicate_of":9,"upstream":13,"downstream":16,"duplicates":21,"related":22,"reserved_at":9,"published_at":23,"modified_at":24,"state":9,"summary":25,"references_raw":27,"kevs":34,"epss":9,"epss_history":35,"metrics":36,"affected":43},"DEBIAN-CVE-2025-38553","In the Linux kernel, the following vulnerability has been resolved:  net/sched: Restrict conditions for adding duplicating netems to qdisc tree  netem_enqueue's duplication prevention logic breaks when a netem resides in a qdisc tree with other netems - this can lead to a soft lockup and OOM loop in netem_dequeue, as seen in [1]. Ensure that a duplicating netem cannot exist in a tree with other netems.  Previous approaches suggested in discussions in chronological order:  1) Track duplication status or ttl in the sk_buff struct. Considered too specific a use case to extend such a struct, though this would be a resilient fix and address other previous and potential future DOS bugs like the one described in loopy fun [2].  2) Restrict netem_enqueue recursion depth like in act_mirred with a per cpu variable. However, netem_dequeue can call enqueue on its child, and the depth restriction could be bypassed if the child is a netem.  3) Use the same approach as in 2, but add metadata in netem_skb_cb to handle the netem_dequeue case and track a packet's involvement in duplication. This is an overly complex approach, and Jamal notes that the skb cb can be overwritten to circumvent this safeguard.  4) Prevent the addition of a netem to a qdisc tree if its ancestral path contains a netem. However, filters and actions can cause a packet to change paths when re-enqueued to the root from netem duplication, leading us to the current solution: prevent a duplicating netem from inhabiting the same tree as other netems.  [1] https://lore.kernel.org/netdev/8DuRWwfqjoRDLDmBMlIfbrsZg9Gx50DHJc1ilxsEBNe2D6NMoigR_eIRIG0LOjMc3r10nUUZtArXx4oZBIdUfZQrwjcQhdinnMis_0G7VEk=@willsroot.io/ [2] https://lwn.net/Articles/719297/",null,[],[],[],[14],{"_key":15},"CVE-2025-38553",[17,19],{"_key":18},"DLA-4327-1",{"_key":20},"DLA-4328-1",[],[],"2025-08-19T06:15:33.407Z","2026-04-28T20:30:00.414854Z",{"cisa_kev":26,"cisa_ransomware":26,"cisa_vendor":9,"epss_severity":9,"epss_score":9,"severity":9,"severity_score":9,"severity_version":9,"severity_source":9,"severity_vector":9,"severity_status":9},false,[28],{"url":29,"sources":30,"tags":32},"https://security-tracker.debian.org/tracker/CVE-2025-38553",[31],"osv_debian",[33],"Advisory",[],[],[37],{"source":31,"cvss_v2_0":9,"cvss_v3_0":9,"cvss_v3_1":38,"cvss_v4_0":9},{"baseScore":39,"baseSeverity":9,"vectorString":40,"impactScore":41,"exploitabilityScore":42},5.5,"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",6,4.6,[44,65],{"ecosystem":45,"name":46,"vendor":47,"product":46,"cpe_part":9,"purl_type":48,"purl_namespace":47,"purl_name":46,"source":9,"versions":49},"Debian","linux","debian","deb",[50,56,59,62],{"version":51,"is_range":52,"range_type":53,"version_start":9,"version_start_type":9,"version_end":54,"version_end_type":55,"fixed_in":9},"lt5_10_244_1",true,"ecosystem","5.10.244-1","excluding",{"version":57,"is_range":52,"range_type":53,"version_start":9,"version_start_type":9,"version_end":58,"version_end_type":55,"fixed_in":9},"lt6_1_148_1","6.1.148-1",{"version":60,"is_range":52,"range_type":53,"version_start":9,"version_start_type":9,"version_end":61,"version_end_type":55,"fixed_in":9},"lt6_12_43_1","6.12.43-1",{"version":63,"is_range":52,"range_type":53,"version_start":9,"version_start_type":9,"version_end":64,"version_end_type":55,"fixed_in":9},"lt6_16_3_1","6.16.3-1",{"ecosystem":45,"name":66,"vendor":47,"product":66,"cpe_part":9,"purl_type":48,"purl_namespace":47,"purl_name":66,"source":9,"versions":67},"linux-6.1",[68],{"version":69,"is_range":52,"range_type":53,"version_start":9,"version_start_type":9,"version_end":70,"version_end_type":55,"fixed_in":9},"lt6_1_153_1~deb11u1","6.1.153-1~deb11u1"]