[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-DEBIAN-CVE-2021-47636":6},{"stargazers_count":4,"fetched_at":5},7,"2026-06-04T02:53:27.892Z",{"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-2021-47636","In the Linux kernel, the following vulnerability has been resolved:  ubifs: Fix read out-of-bounds in ubifs_wbuf_write_nolock()  Function ubifs_wbuf_write_nolock() may access buf out of bounds in following process:  ubifs_wbuf_write_nolock():   aligned_len = ALIGN(len, 8);   // Assume len = 4089, aligned_len = 4096   if (aligned_len \u003C= wbuf->avail) ... // Not satisfy   if (wbuf->used) {     ubifs_leb_write()  // Fill some data in avail wbuf     len -= wbuf->avail;   // len is still not 8-bytes aligned     aligned_len -= wbuf->avail;   }   n = aligned_len >> c->max_write_shift;   if (n) {     n \u003C\u003C= c->max_write_shift;     err = ubifs_leb_write(c, wbuf->lnum, buf + written,                           wbuf->offs, n);     // n > len, read out of bounds less than 8(n-len) bytes   }  , which can be catched by KASAN:   =========================================================   BUG: KASAN: slab-out-of-bounds in ecc_sw_hamming_calculate+0x1dc/0x7d0   Read of size 4 at addr ffff888105594ff8 by task kworker/u8:4/128   Workqueue: writeback wb_workfn (flush-ubifs_0_0)   Call Trace:     kasan_report.cold+0x81/0x165     nand_write_page_swecc+0xa9/0x160     ubifs_leb_write+0xf2/0x1b0 [ubifs]     ubifs_wbuf_write_nolock+0x421/0x12c0 [ubifs]     write_head+0xdc/0x1c0 [ubifs]     ubifs_jnl_write_inode+0x627/0x960 [ubifs]     wb_workfn+0x8af/0xb80  Function ubifs_wbuf_write_nolock() accepts that parameter 'len' is not 8 bytes aligned, the 'len' represents the true length of buf (which is allocated in 'ubifs_jnl_xxx', eg. ubifs_jnl_write_inode), so ubifs_wbuf_write_nolock() must handle the length read from 'buf' carefully to write leb safely.  Fetch a reproducer in [Link].",null,[],[],[],[14],{"_key":15},"CVE-2021-47636",[],[],[],"2025-02-26T06:37:05.377Z","2026-04-28T20:23:34.110695Z",{"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-2021-47636",[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},7.1,"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",8.7,4.6,[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_113_1",true,"ecosystem","5.10.113-1","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_17_3_1","5.17.3-1",{"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}]