[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-DEBIAN-CVE-2022-50488":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":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":39},"DEBIAN-CVE-2022-50488","In the Linux kernel, the following vulnerability has been resolved:  block, bfq: fix possible uaf for 'bfqq->bic'  Our test report a uaf for 'bfqq->bic' in 5.10:  ================================================================== BUG: KASAN: use-after-free in bfq_select_queue+0x378/0xa30  CPU: 6 PID: 2318352 Comm: fsstress Kdump: loaded Not tainted 5.10.0-60.18.0.50.h602.kasan.eulerosv2r11.x86_64 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58-20220320_160524-szxrtosci10000 04/01/2014 Call Trace:  bfq_select_queue+0x378/0xa30  bfq_dispatch_request+0xe8/0x130  blk_mq_do_dispatch_sched+0x62/0xb0  __blk_mq_sched_dispatch_requests+0x215/0x2a0  blk_mq_sched_dispatch_requests+0x8f/0xd0  __blk_mq_run_hw_queue+0x98/0x180  __blk_mq_delay_run_hw_queue+0x22b/0x240  blk_mq_run_hw_queue+0xe3/0x190  blk_mq_sched_insert_requests+0x107/0x200  blk_mq_flush_plug_list+0x26e/0x3c0  blk_finish_plug+0x63/0x90  __iomap_dio_rw+0x7b5/0x910  iomap_dio_rw+0x36/0x80  ext4_dio_read_iter+0x146/0x190 [ext4]  ext4_file_read_iter+0x1e2/0x230 [ext4]  new_sync_read+0x29f/0x400  vfs_read+0x24e/0x2d0  ksys_read+0xd5/0x1b0  do_syscall_64+0x33/0x40  entry_SYSCALL_64_after_hwframe+0x61/0xc6  Commit 3bc5e683c67d (\"bfq: Split shared queues on move between cgroups\") changes that move process to a new cgroup will allocate a new bfqq to use, however, the old bfqq and new bfqq can point to the same bic:  1) Initial state, two process with io in the same cgroup.  Process 1       Process 2  (BIC1)          (BIC2)   |  Λ            |  Λ   |  |            |  |   V  |            V  |   bfqq1           bfqq2  2) bfqq1 is merged to bfqq2.  Process 1       Process 2  (BIC1)          (BIC2)   |               |    \\-------------\\|                   V   bfqq1           bfqq2(coop)  3) Process 1 exit, then issue new io(denoce IOA) from Process 2.   (BIC2)   |  Λ   |  |   V  |   bfqq2(coop)  4) Before IOA is completed, move Process 2 to another cgroup and issue io.  Process 2  (BIC2)    Λ    |\\--------------\\    |                V   bfqq2           bfqq3  Now that BIC2 points to bfqq3, while bfqq2 and bfqq3 both point to BIC2. If all the requests are completed, and Process 2 exit, BIC2 will be freed while there is no guarantee that bfqq2 will be freed before BIC2.  Fix the problem by clearing bfqq->bic while bfqq is detached from bic.",null,[],[],[],[14],{"_key":15},"CVE-2022-50488",[],[],[],"2025-10-04T16:15:45.707Z","2026-04-28T20:25:36.791372Z",{"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-2022-50488",[27],"osv_debian",[29],"Advisory",[],[],[33],{"source":27,"cvss_v2_0":9,"cvss_v3_0":9,"cvss_v3_1":34,"cvss_v4_0":9},{"baseScore":35,"baseSeverity":9,"vectorString":36,"impactScore":37,"exploitabilityScore":38},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,[40],{"ecosystem":41,"name":42,"vendor":43,"product":42,"cpe_part":9,"purl_type":44,"purl_namespace":43,"purl_name":42,"source":9,"versions":45},"Debian","linux","debian","deb",[46,52,55,56],{"version":47,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":50,"version_end_type":51,"fixed_in":9},"lt5_10_178_1",true,"ecosystem","5.10.178-1","excluding",{"version":53,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":54,"version_end_type":51,"fixed_in":9},"lt6_1_4_1","6.1.4-1",{"version":53,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":54,"version_end_type":51,"fixed_in":9},{"version":53,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":54,"version_end_type":51,"fixed_in":9}]