{"id":"DEBIAN-CVE-2024-43910","details":"In the Linux kernel, the following vulnerability has been resolved:  bpf: add missing check_func_arg_reg_off() to prevent out-of-bounds memory accesses  Currently, it's possible to pass in a modified CONST_PTR_TO_DYNPTR to a global function as an argument. The adverse effects of this is that BPF helpers can continue to make use of this modified CONST_PTR_TO_DYNPTR from within the context of the global function, which can unintentionally result in out-of-bounds memory accesses and therefore compromise overall system stability i.e.  [  244.157771] BUG: KASAN: slab-out-of-bounds in bpf_dynptr_data+0x137/0x140 [  244.161345] Read of size 8 at addr ffff88810914be68 by task test_progs/302 [  244.167151] CPU: 0 PID: 302 Comm: test_progs Tainted: G O E 6.10.0-rc3-00131-g66b586715063 #533 [  244.174318] Call Trace: [  244.175787]  \u003cTASK\u003e [  244.177356]  dump_stack_lvl+0x66/0xa0 [  244.179531]  print_report+0xce/0x670 [  244.182314]  ? __virt_addr_valid+0x200/0x3e0 [  244.184908]  kasan_report+0xd7/0x110 [  244.187408]  ? bpf_dynptr_data+0x137/0x140 [  244.189714]  ? bpf_dynptr_data+0x137/0x140 [  244.192020]  bpf_dynptr_data+0x137/0x140 [  244.194264]  bpf_prog_b02a02fdd2bdc5fa_global_call_bpf_dynptr_data+0x22/0x26 [  244.198044]  bpf_prog_b0fe7b9d7dc3abde_callback_adjust_bpf_dynptr_reg_off+0x1f/0x23 [  244.202136]  bpf_user_ringbuf_drain+0x2c7/0x570 [  244.204744]  ? 0xffffffffc0009e58 [  244.206593]  ? __pfx_bpf_user_ringbuf_drain+0x10/0x10 [  244.209795]  bpf_prog_33ab33f6a804ba2d_user_ringbuf_callback_const_ptr_to_dynptr_reg_off+0x47/0x4b [  244.215922]  bpf_trampoline_6442502480+0x43/0xe3 [  244.218691]  __x64_sys_prlimit64+0x9/0xf0 [  244.220912]  do_syscall_64+0xc1/0x1d0 [  244.223043]  entry_SYSCALL_64_after_hwframe+0x77/0x7f [  244.226458] RIP: 0033:0x7ffa3eb8f059 [  244.228582] Code: 08 89 e8 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 8b 0d 8f 1d 0d 00 f7 d8 64 89 01 48 [  244.241307] RSP: 002b:00007ffa3e9c6eb8 EFLAGS: 00000206 ORIG_RAX: 000000000000012e [  244.246474] RAX: ffffffffffffffda RBX: 00007ffa3e9c7cdc RCX: 00007ffa3eb8f059 [  244.250478] RDX: 00007ffa3eb162b4 RSI: 0000000000000000 RDI: 00007ffa3e9c7fb0 [  244.255396] RBP: 00007ffa3e9c6ed0 R08: 00007ffa3e9c76c0 R09: 0000000000000000 [  244.260195] R10: 0000000000000000 R11: 0000000000000206 R12: ffffffffffffff80 [  244.264201] R13: 000000000000001c R14: 00007ffc5d6b4260 R15: 00007ffa3e1c7000 [  244.268303]  \u003c/TASK\u003e  Add a check_func_arg_reg_off() to the path in which the BPF verifier verifies the arguments of global function arguments, specifically those which take an argument of type ARG_PTR_TO_DYNPTR | MEM_RDONLY. Also, process_dynptr_func() doesn't appear to perform any explicit and strict type matching on the supplied register type, so let's also enforce that a register either type PTR_TO_STACK or CONST_PTR_TO_DYNPTR is by the caller.","modified":"2026-09-15T09:02:57.799124402Z","published":"2024-08-26T11:15:05.177Z","upstream":["CVE-2024-43910"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-43910"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.10.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-43910.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.10.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-43910.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"}]}