[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-DEBIAN-CVE-2025-40214":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":17,"related":18,"reserved_at":9,"published_at":19,"modified_at":20,"state":9,"summary":21,"references_raw":23,"kevs":30,"epss":9,"epss_history":31,"metrics":32,"affected":33},"DEBIAN-CVE-2025-40214","In the Linux kernel, the following vulnerability has been resolved:  af_unix: Initialise scc_index in unix_add_edge().  Quang Le reported that the AF_UNIX GC could garbage-collect a receive queue of an alive in-flight socket, with a nice repro.  The repro consists of three stages.    1)     1-a. Create a single cyclic reference with many sockets     1-b. close() all sockets     1-c. Trigger GC    2)     2-a. Pass sk-A to an embryo sk-B     2-b. Pass sk-X to sk-X     2-c. Trigger GC    3)     3-a. accept() the embryo sk-B     3-b. Pass sk-B to sk-C     3-c. close() the in-flight sk-A     3-d. Trigger GC  As of 2-c, sk-A and sk-X are linked to unix_unvisited_vertices, and unix_walk_scc() groups them into two different SCCs:    unix_sk(sk-A)->vertex->scc_index = 2 (UNIX_VERTEX_INDEX_START)   unix_sk(sk-X)->vertex->scc_index = 3  Once GC completes, unix_graph_grouped is set to true. Also, unix_graph_maybe_cyclic is set to true due to sk-X's cyclic self-reference, which makes close() trigger GC.  At 3-b, unix_add_edge() allocates unix_sk(sk-B)->vertex and links it to unix_unvisited_vertices.  unix_update_graph() is called at 3-a. and 3-b., but neither unix_graph_grouped nor unix_graph_maybe_cyclic is changed because both sk-B's listener and sk-C are not in-flight.  3-c decrements sk-A's file refcnt to 1.  Since unix_graph_grouped is true at 3-d, unix_walk_scc_fast() is finally called and iterates 3 sockets sk-A, sk-B, and sk-X:    sk-A -> sk-B (-> sk-C)   sk-X -> sk-X  This is totally fine.  All of them are not yet close()d and should be grouped into different SCCs.  However, unix_vertex_dead() misjudges that sk-A and sk-B are in the same SCC and sk-A is dead.    unix_sk(sk-A)->scc_index == unix_sk(sk-B)->scc_index \u003C-- Wrong!   &&   sk-A's file refcnt == unix_sk(sk-A)->vertex->out_degree                                        ^-- 1 in-flight count for sk-B   -> sk-A is dead !?  The problem is that unix_add_edge() does not initialise scc_index.  Stage 1) is used for heap spraying, making a newly allocated vertex have vertex->scc_index == 2 (UNIX_VERTEX_INDEX_START) set by unix_walk_scc() at 1-c.  Let's track the max SCC index from the previous unix_walk_scc() call and assign the max + 1 to a new vertex's scc_index.  This way, we can continue to avoid Tarjan's algorithm while preventing misjudgments.",null,[],[],[],[14],{"_key":15},"CVE-2025-40214",[],[],[],"2025-12-04T13:15:48.157Z","2026-04-28T20:30:08.642459Z",{"cisa_kev":22,"cisa_ransomware":22,"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,[24],{"url":25,"sources":26,"tags":28},"https://security-tracker.debian.org/tracker/CVE-2025-40214",[27],"osv_debian",[29],"Advisory",[],[],[],[34,52],{"ecosystem":35,"name":36,"vendor":37,"product":36,"cpe_part":9,"purl_type":38,"purl_namespace":37,"purl_name":36,"source":9,"versions":39},"Debian","linux","debian","deb",[40,46,49],{"version":41,"is_range":42,"range_type":43,"version_start":9,"version_start_type":9,"version_end":44,"version_end_type":45,"fixed_in":9},"lt6_1_159_1",true,"ecosystem","6.1.159-1","excluding",{"version":47,"is_range":42,"range_type":43,"version_start":9,"version_start_type":9,"version_end":48,"version_end_type":45,"fixed_in":9},"lt6_12_63_1","6.12.63-1",{"version":50,"is_range":42,"range_type":43,"version_start":9,"version_start_type":9,"version_end":51,"version_end_type":45,"fixed_in":9},"lt6_17_9_1","6.17.9-1",{"ecosystem":35,"name":53,"vendor":37,"product":53,"cpe_part":9,"purl_type":38,"purl_namespace":37,"purl_name":53,"source":9,"versions":54},"linux-6.1",[55],{"version":56,"is_range":42,"range_type":43,"version_start":9,"version_start_type":9,"version_end":57,"version_end_type":45,"fixed_in":9},"lt6_1_159_1~deb11u1","6.1.159-1~deb11u1"]