[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-DEBIAN-CVE-2025-37797":6},{"stargazers_count":4,"fetched_at":5},7,"2026-06-04T08:53:30.047Z",{"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-2025-37797","In the Linux kernel, the following vulnerability has been resolved:  net_sched: hfsc: Fix a UAF vulnerability in class handling  This patch fixes a Use-After-Free vulnerability in the HFSC qdisc class handling. The issue occurs due to a time-of-check/time-of-use condition in hfsc_change_class() when working with certain child qdiscs like netem or codel.  The vulnerability works as follows: 1. hfsc_change_class() checks if a class has packets (q.qlen != 0) 2. It then calls qdisc_peek_len(), which for certain qdiscs (e.g.,    codel, netem) might drop packets and empty the queue 3. The code continues assuming the queue is still non-empty, adding    the class to vttree 4. This breaks HFSC scheduler assumptions that only non-empty classes    are in vttree 5. Later, when the class is destroyed, this can lead to a Use-After-Free  The fix adds a second queue length check after qdisc_peek_len() to verify the queue wasn't emptied.",null,[],[],[],[14],{"_key":15},"CVE-2025-37797",[17,19],{"_key":18},"DLA-4178-1",{"_key":20},"DLA-4193-1",[],[],"2025-05-02T15:15:48.557Z","2026-04-28T20:29:46.137769Z",{"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-2025-37797",[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},7.8,"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",9.8,4.6,[44,63],{"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_237_1",true,"ecosystem","5.10.237-1","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_137_1","6.1.137-1",{"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_27_1","6.12.27-1",{"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},{"ecosystem":45,"name":64,"vendor":47,"product":64,"cpe_part":9,"purl_type":48,"purl_namespace":47,"purl_name":64,"source":9,"versions":65},"linux-6.1",[66],{"version":67,"is_range":52,"range_type":53,"version_start":9,"version_start_type":9,"version_end":68,"version_end_type":55,"fixed_in":9},"lt6_1_137_1~deb11u1","6.1.137-1~deb11u1"]