[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-DEBIAN-CVE-2021-47623":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-2021-47623","In the Linux kernel, the following vulnerability has been resolved:  powerpc/fixmap: Fix VM debug warning on unmap  Unmapping a fixmap entry is done by calling __set_fixmap() with FIXMAP_PAGE_CLEAR as flags.  Today, powerpc __set_fixmap() calls map_kernel_page().  map_kernel_page() is not happy when called a second time for the same page.  \tWARNING: CPU: 0 PID: 1 at arch/powerpc/mm/pgtable.c:194 set_pte_at+0xc/0x1e8 \tCPU: 0 PID: 1 Comm: swapper Not tainted 5.16.0-rc3-s3k-dev-01993-g350ff07feb7d-dirty #682 \tNIP:  c0017cd4 LR: c00187f0 CTR: 00000010 \tREGS: e1011d50 TRAP: 0700   Not tainted  (5.16.0-rc3-s3k-dev-01993-g350ff07feb7d-dirty) \tMSR:  00029032 \u003CEE,ME,IR,DR,RI>  CR: 42000208  XER: 00000000  \tGPR00: c0165fec e1011e10 c14c0000 c0ee2550 ff800000 c0f3d000 00000000 c001686c \tGPR08: 00001000 b00045a9 00000001 c0f58460 c0f50000 00000000 c0007e10 00000000 \tGPR16: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 \tGPR24: 00000000 00000000 c0ee2550 00000000 c0f57000 00000ff8 00000000 ff800000 \tNIP [c0017cd4] set_pte_at+0xc/0x1e8 \tLR [c00187f0] map_kernel_page+0x9c/0x100 \tCall Trace: \t[e1011e10] [c0736c68] vsnprintf+0x358/0x6c8 (unreliable) \t[e1011e30] [c0165fec] __set_fixmap+0x30/0x44 \t[e1011e40] [c0c13bdc] early_iounmap+0x11c/0x170 \t[e1011e70] [c0c06cb0] ioremap_legacy_serial_console+0x88/0xc0 \t[e1011e90] [c0c03634] do_one_initcall+0x80/0x178 \t[e1011ef0] [c0c0385c] kernel_init_freeable+0xb4/0x250 \t[e1011f20] [c0007e34] kernel_init+0x24/0x140 \t[e1011f30] [c0016268] ret_from_kernel_thread+0x5c/0x64 \tInstruction dump: \t7fe3fb78 48019689 80010014 7c630034 83e1000c 5463d97e 7c0803a6 38210010 \t4e800020 81250000 712a0001 41820008 \u003C0fe00000> 9421ffe0 93e1001c 48000030  Implement unmap_kernel_page() which clears an existing pte.",null,[],[],[],[14],{"_key":15},"CVE-2021-47623",[],[],[],"2024-07-16T12:15:02.483Z","2026-04-28T20:23:33.930915Z",{"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-2021-47623",[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_103_1",true,"ecosystem","5.10.103-1","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_16_10_1","5.16.10-1",{"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}]