[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-DEBIAN-CVE-2023-53513":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-2023-53513","In the Linux kernel, the following vulnerability has been resolved:  nbd: fix incomplete validation of ioctl arg  We tested and found an alarm caused by nbd_ioctl arg without verification. The UBSAN warning calltrace like below:  UBSAN: Undefined behaviour in fs/buffer.c:1709:35 signed integer overflow: -9223372036854775808 - 1 cannot be represented in type 'long long int' CPU: 3 PID: 2523 Comm: syz-executor.0 Not tainted 4.19.90 #1 Hardware name: linux,dummy-virt (DT) Call trace:  dump_backtrace+0x0/0x3f0 arch/arm64/kernel/time.c:78  show_stack+0x28/0x38 arch/arm64/kernel/traps.c:158  __dump_stack lib/dump_stack.c:77 [inline]  dump_stack+0x170/0x1dc lib/dump_stack.c:118  ubsan_epilogue+0x18/0xb4 lib/ubsan.c:161  handle_overflow+0x188/0x1dc lib/ubsan.c:192  __ubsan_handle_sub_overflow+0x34/0x44 lib/ubsan.c:206  __block_write_full_page+0x94c/0xa20 fs/buffer.c:1709  block_write_full_page+0x1f0/0x280 fs/buffer.c:2934  blkdev_writepage+0x34/0x40 fs/block_dev.c:607  __writepage+0x68/0xe8 mm/page-writeback.c:2305  write_cache_pages+0x44c/0xc70 mm/page-writeback.c:2240  generic_writepages+0xdc/0x148 mm/page-writeback.c:2329  blkdev_writepages+0x2c/0x38 fs/block_dev.c:2114  do_writepages+0xd4/0x250 mm/page-writeback.c:2344  The reason for triggering this warning is __block_write_full_page() -> i_size_read(inode) - 1 overflow. inode->i_size is assigned in __nbd_ioctl() -> nbd_set_size() -> bytesize. We think it is necessary to limit the size of arg to prevent errors.  Moreover, __nbd_ioctl() -> nbd_add_socket(), arg will be cast to int. Assuming the value of arg is 0x80000000000000001) (on a 64-bit machine), it will become 1 after the coercion, which will return unexpected results.  Fix it by adding checks to prevent passing in too large numbers.",null,[],[],[],[14],{"_key":15},"CVE-2023-53513",[],[],[],"2025-10-01T12:15:55.317Z","2026-04-28T20:27:03.095171Z",{"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-2023-53513",[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",[46,50,54,57],{"version":47,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},"all",true,"ecosystem",{"version":51,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":52,"version_end_type":53,"fixed_in":9},"lt6_1_37_1","6.1.37-1","excluding",{"version":55,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":56,"version_end_type":53,"fixed_in":9},"lt6_3_7_1","6.3.7-1",{"version":55,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":56,"version_end_type":53,"fixed_in":9}]