[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-DEBIAN-CVE-2024-56640":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":19,"related":20,"reserved_at":9,"published_at":21,"modified_at":22,"state":9,"summary":23,"references_raw":25,"kevs":32,"epss":9,"epss_history":33,"metrics":34,"affected":41},"DEBIAN-CVE-2024-56640","In the Linux kernel, the following vulnerability has been resolved:  net/smc: fix LGR and link use-after-free issue  We encountered a LGR/link use-after-free issue, which manifested as the LGR/link refcnt reaching 0 early and entering the clear process, making resource access unsafe.   refcount_t: addition on 0; use-after-free.  WARNING: CPU: 14 PID: 107447 at lib/refcount.c:25 refcount_warn_saturate+0x9c/0x140  Workqueue: events smc_lgr_terminate_work [smc]  Call trace:   refcount_warn_saturate+0x9c/0x140   __smc_lgr_terminate.part.45+0x2a8/0x370 [smc]   smc_lgr_terminate_work+0x28/0x30 [smc]   process_one_work+0x1b8/0x420   worker_thread+0x158/0x510   kthread+0x114/0x118  or   refcount_t: underflow; use-after-free.  WARNING: CPU: 6 PID: 93140 at lib/refcount.c:28 refcount_warn_saturate+0xf0/0x140  Workqueue: smc_hs_wq smc_listen_work [smc]  Call trace:   refcount_warn_saturate+0xf0/0x140   smcr_link_put+0x1cc/0x1d8 [smc]   smc_conn_free+0x110/0x1b0 [smc]   smc_conn_abort+0x50/0x60 [smc]   smc_listen_find_device+0x75c/0x790 [smc]   smc_listen_work+0x368/0x8a0 [smc]   process_one_work+0x1b8/0x420   worker_thread+0x158/0x510   kthread+0x114/0x118  It is caused by repeated release of LGR/link refcnt. One suspect is that smc_conn_free() is called repeatedly because some smc_conn_free() from server listening path are not protected by sock lock.  e.g.  Calls under socklock        | smc_listen_work ------------------------------------------------------- lock_sock(sk)               | smc_conn_abort smc_conn_free               | \\- smc_conn_free \\- smcr_link_put            |    \\- smcr_link_put (duplicated) release_sock(sk)  So here add sock lock protection in smc_listen_work() path, making it exclusive with other connection operations.",null,[],[],[],[14],{"_key":15},"CVE-2024-56640",[17],{"_key":18},"DLA-4076-1",[],[],"2024-12-27T15:15:23.730Z","2026-04-28T20:29:08.202125Z",{"cisa_kev":24,"cisa_ransomware":24,"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,[26],{"url":27,"sources":28,"tags":30},"https://security-tracker.debian.org/tracker/CVE-2024-56640",[29],"osv_debian",[31],"Advisory",[],[],[35],{"source":29,"cvss_v2_0":9,"cvss_v3_0":9,"cvss_v3_1":36,"cvss_v4_0":9},{"baseScore":37,"baseSeverity":9,"vectorString":38,"impactScore":39,"exploitabilityScore":40},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,[42,60],{"ecosystem":43,"name":44,"vendor":45,"product":44,"cpe_part":9,"purl_type":46,"purl_namespace":45,"purl_name":44,"source":9,"versions":47},"Debian","linux","debian","deb",[48,52,56,59],{"version":49,"is_range":50,"range_type":51,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},"all",true,"ecosystem",{"version":53,"is_range":50,"range_type":51,"version_start":9,"version_start_type":9,"version_end":54,"version_end_type":55,"fixed_in":9},"lt6_1_123_1","6.1.123-1","excluding",{"version":57,"is_range":50,"range_type":51,"version_start":9,"version_start_type":9,"version_end":58,"version_end_type":55,"fixed_in":9},"lt6_12_5_1","6.12.5-1",{"version":57,"is_range":50,"range_type":51,"version_start":9,"version_start_type":9,"version_end":58,"version_end_type":55,"fixed_in":9},{"ecosystem":43,"name":61,"vendor":45,"product":61,"cpe_part":9,"purl_type":46,"purl_namespace":45,"purl_name":61,"source":9,"versions":62},"linux-6.1",[63],{"version":64,"is_range":50,"range_type":51,"version_start":9,"version_start_type":9,"version_end":65,"version_end_type":55,"fixed_in":9},"lt6_1_128_1~deb11u1","6.1.128-1~deb11u1"]