{"id":"DEBIAN-CVE-2021-47080","details":"In the Linux kernel, the following vulnerability has been resolved:  RDMA/core: Prevent divide-by-zero error triggered by the user  The user_entry_size is supplied by the user and later used as a denominator to calculate number of entries. The zero supplied by the user will trigger the following divide-by-zero error:   divide error: 0000 [#1] SMP KASAN PTI  CPU: 4 PID: 497 Comm: c_repro Not tainted 5.13.0-rc1+ #281  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014  RIP: 0010:ib_uverbs_handler_UVERBS_METHOD_QUERY_GID_TABLE+0x1b1/0x510  Code: 87 59 03 00 00 e8 9f ab 1e ff 48 8d bd a8 00 00 00 e8 d3 70 41 ff 44 0f b7 b5 a8 00 00 00 e8 86 ab 1e ff 31 d2 4c 89 f0 31 ff \u003c49\u003e f7 f5 48 89 d6 48 89 54 24 10 48 89 04 24 e8 1b ad 1e ff 48 8b  RSP: 0018:ffff88810416f828 EFLAGS: 00010246  RAX: 0000000000000008 RBX: 1ffff1102082df09 RCX: ffffffff82183f3d  RDX: 0000000000000000 RSI: ffff888105f2da00 RDI: 0000000000000000  RBP: ffff88810416fa98 R08: 0000000000000001 R09: ffffed102082df5f  R10: ffff88810416faf7 R11: ffffed102082df5e R12: 0000000000000000  R13: 0000000000000000 R14: 0000000000000008 R15: ffff88810416faf0  FS:  00007f5715efa740(0000) GS:ffff88811a700000(0000) knlGS:0000000000000000  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033  CR2: 0000000020000840 CR3: 000000010c2e0001 CR4: 0000000000370ea0  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400  Call Trace:   ? ib_uverbs_handler_UVERBS_METHOD_INFO_HANDLES+0x4b0/0x4b0   ib_uverbs_cmd_verbs+0x1546/0x1940   ib_uverbs_ioctl+0x186/0x240   __x64_sys_ioctl+0x38a/0x1220   do_syscall_64+0x3f/0x80   entry_SYSCALL_64_after_hwframe+0x44/0xae","modified":"2026-09-15T09:02:35.171054182Z","published":"2024-03-01T22:15:47.433Z","upstream":["CVE-2021-47080"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2021-47080"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.10.40-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-47080.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.10.40-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-47080.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.10.40-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-47080.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}