[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-DEBIAN-CVE-2021-47492":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":39},"DEBIAN-CVE-2021-47492","In the Linux kernel, the following vulnerability has been resolved:  mm, thp: bail out early in collapse_file for writeback page  Currently collapse_file does not explicitly check PG_writeback, instead, page_has_private and try_to_release_page are used to filter writeback pages.  This does not work for xfs with blocksize equal to or larger than pagesize, because in such case xfs has no page->private.  This makes collapse_file bail out early for writeback page.  Otherwise, xfs end_page_writeback will panic as follows.    page:fffffe00201bcc80 refcount:0 mapcount:0 mapping:ffff0003f88c86a8 index:0x0 pfn:0x84ef32   aops:xfs_address_space_operations [xfs] ino:30000b7 dentry name:\"libtest.so\"   flags: 0x57fffe0000008027(locked|referenced|uptodate|active|writeback)   raw: 57fffe0000008027 ffff80001b48bc28 ffff80001b48bc28 ffff0003f88c86a8   raw: 0000000000000000 0000000000000000 00000000ffffffff ffff0000c3e9a000   page dumped because: VM_BUG_ON_PAGE(((unsigned int) page_ref_count(page) + 127u \u003C= 127u))   page->mem_cgroup:ffff0000c3e9a000   ------------[ cut here ]------------   kernel BUG at include/linux/mm.h:1212!   Internal error: Oops - BUG: 0 [#1] SMP   Modules linked in:   BUG: Bad page state in process khugepaged  pfn:84ef32    xfs(E)   page:fffffe00201bcc80 refcount:0 mapcount:0 mapping:0 index:0x0 pfn:0x84ef32    libcrc32c(E) rfkill(E) aes_ce_blk(E) crypto_simd(E) ...   CPU: 25 PID: 0 Comm: swapper/25 Kdump: loaded Tainted: ...   pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--)   Call trace:     end_page_writeback+0x1c0/0x214     iomap_finish_page_writeback+0x13c/0x204     iomap_finish_ioend+0xe8/0x19c     iomap_writepage_end_bio+0x38/0x50     bio_endio+0x168/0x1ec     blk_update_request+0x278/0x3f0     blk_mq_end_request+0x34/0x15c     virtblk_request_done+0x38/0x74 [virtio_blk]     blk_done_softirq+0xc4/0x110     __do_softirq+0x128/0x38c     __irq_exit_rcu+0x118/0x150     irq_exit+0x1c/0x30     __handle_domain_irq+0x8c/0xf0     gic_handle_irq+0x84/0x108     el1_irq+0xcc/0x180     arch_cpu_idle+0x18/0x40     default_idle_call+0x4c/0x1a0     cpuidle_idle_call+0x168/0x1e0     do_idle+0xb4/0x104     cpu_startup_entry+0x30/0x9c     secondary_start_kernel+0x104/0x180   Code: d4210000 b0006161 910c8021 94013f4d (d4210000)   ---[ end trace 4a88c6a074082f8c ]---   Kernel panic - not syncing: Oops - BUG: Fatal exception in interrupt",null,[],[],[],[14],{"_key":15},"CVE-2021-47492",[],[],[],"2024-05-22T09:15:11.030Z","2026-04-28T20:23:30.192158Z",{"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-2021-47492",[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},5.5,"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",6,4.6,[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_84_1",true,"ecosystem","5.10.84-1","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},"lt5_15_3_1","5.15.3-1",{"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}]