[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-DEBIAN-CVE-2024-56672":6},{"stargazers_count":4,"fetched_at":5},7,"2026-06-04T20:55:29.923Z",{"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":42},"DEBIAN-CVE-2024-56672","In the Linux kernel, the following vulnerability has been resolved:  blk-cgroup: Fix UAF in blkcg_unpin_online()  blkcg_unpin_online() walks up the blkcg hierarchy putting the online pin. To walk up, it uses blkcg_parent(blkcg) but it was calling that after blkcg_destroy_blkgs(blkcg) which could free the blkcg, leading to the following UAF:    ==================================================================   BUG: KASAN: slab-use-after-free in blkcg_unpin_online+0x15a/0x270   Read of size 8 at addr ffff8881057678c0 by task kworker/9:1/117    CPU: 9 UID: 0 PID: 117 Comm: kworker/9:1 Not tainted 6.13.0-rc1-work-00182-gb8f52214c61a-dirty #48   Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS unknown 02/02/2022   Workqueue: cgwb_release cgwb_release_workfn   Call Trace:    \u003CTASK>    dump_stack_lvl+0x27/0x80    print_report+0x151/0x710    kasan_report+0xc0/0x100    blkcg_unpin_online+0x15a/0x270    cgwb_release_workfn+0x194/0x480    process_scheduled_works+0x71b/0xe20    worker_thread+0x82a/0xbd0    kthread+0x242/0x2c0    ret_from_fork+0x33/0x70    ret_from_fork_asm+0x1a/0x30    \u003C/TASK>   ...   Freed by task 1944:    kasan_save_track+0x2b/0x70    kasan_save_free_info+0x3c/0x50    __kasan_slab_free+0x33/0x50    kfree+0x10c/0x330    css_free_rwork_fn+0xe6/0xb30    process_scheduled_works+0x71b/0xe20    worker_thread+0x82a/0xbd0    kthread+0x242/0x2c0    ret_from_fork+0x33/0x70    ret_from_fork_asm+0x1a/0x30  Note that the UAF is not easy to trigger as the free path is indirected behind a couple RCU grace periods and a work item execution. I could only trigger it with artifical msleep() injected in blkcg_unpin_online().  Fix it by reading the parent pointer before destroying the blkcg's blkg's.",null,[],[],[],[14],{"_key":15},"CVE-2024-56672",[17,19],{"_key":18},"DLA-4075-1",{"_key":20},"DLA-4076-1",[],[],"2024-12-27T15:15:27.107Z","2026-04-28T20:29:09.515776Z",{"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-2024-56672",[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":4,"baseSeverity":9,"vectorString":39,"impactScore":40,"exploitabilityScore":41},"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",9.8,2.6,[43,62],{"ecosystem":44,"name":45,"vendor":46,"product":45,"cpe_part":9,"purl_type":47,"purl_namespace":46,"purl_name":45,"source":9,"versions":48},"Debian","linux","debian","deb",[49,55,58,61],{"version":50,"is_range":51,"range_type":52,"version_start":9,"version_start_type":9,"version_end":53,"version_end_type":54,"fixed_in":9},"lt5_10_234_1",true,"ecosystem","5.10.234-1","excluding",{"version":56,"is_range":51,"range_type":52,"version_start":9,"version_start_type":9,"version_end":57,"version_end_type":54,"fixed_in":9},"lt6_1_123_1","6.1.123-1",{"version":59,"is_range":51,"range_type":52,"version_start":9,"version_start_type":9,"version_end":60,"version_end_type":54,"fixed_in":9},"lt6_12_6_1","6.12.6-1",{"version":59,"is_range":51,"range_type":52,"version_start":9,"version_start_type":9,"version_end":60,"version_end_type":54,"fixed_in":9},{"ecosystem":44,"name":63,"vendor":46,"product":63,"cpe_part":9,"purl_type":47,"purl_namespace":46,"purl_name":63,"source":9,"versions":64},"linux-6.1",[65],{"version":66,"is_range":51,"range_type":52,"version_start":9,"version_start_type":9,"version_end":67,"version_end_type":54,"fixed_in":9},"lt6_1_128_1~deb11u1","6.1.128-1~deb11u1"]