{"id":"DEBIAN-CVE-2021-46913","details":"In the Linux kernel, the following vulnerability has been resolved:  netfilter: nftables: clone set element expression template  memcpy() breaks when using connlimit in set elements. Use nft_expr_clone() to initialize the connlimit expression list, otherwise connlimit garbage collector crashes when walking on the list head copy.  [  493.064656] Workqueue: events_power_efficient nft_rhash_gc [nf_tables] [  493.064685] RIP: 0010:find_or_evict+0x5a/0x90 [nf_conncount] [  493.064694] Code: 2b 43 40 83 f8 01 77 0d 48 c7 c0 f5 ff ff ff 44 39 63 3c 75 df 83 6d 18 01 48 8b 43 08 48 89 de 48 8b 13 48 8b 3d ee 2f 00 00 \u003c48\u003e 89 42 08 48 89 10 48 b8 00 01 00 00 00 00 ad de 48 89 03 48 83 [  493.064699] RSP: 0018:ffffc90000417dc0 EFLAGS: 00010297 [  493.064704] RAX: 0000000000000000 RBX: ffff888134f38410 RCX: 0000000000000000 [  493.064708] RDX: 0000000000000000 RSI: ffff888134f38410 RDI: ffff888100060cc0 [  493.064711] RBP: ffff88812ce594a8 R08: ffff888134f38438 R09: 00000000ebb9025c [  493.064714] R10: ffffffff8219f838 R11: 0000000000000017 R12: 0000000000000001 [  493.064718] R13: ffffffff82146740 R14: ffff888134f38410 R15: 0000000000000000 [  493.064721] FS:  0000000000000000(0000) GS:ffff88840e440000(0000) knlGS:0000000000000000 [  493.064725] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [  493.064729] CR2: 0000000000000008 CR3: 00000001330aa002 CR4: 00000000001706e0 [  493.064733] Call Trace: [  493.064737]  nf_conncount_gc_list+0x8f/0x150 [nf_conncount] [  493.064746]  nft_rhash_gc+0x106/0x390 [nf_tables]","modified":"2026-09-01T20:04:34.840832358Z","published":"2024-02-27T07:15:07.770Z","upstream":["CVE-2021-46913"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2021-46913"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.14.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-46913.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.14.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-46913.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.14.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-46913.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"}]}