{"id":"DEBIAN-CVE-2024-50162","details":"In the Linux kernel, the following vulnerability has been resolved:  bpf: devmap: provide rxq after redirect  rxq contains a pointer to the device from where the redirect happened. Currently, the BPF program that was executed after a redirect via BPF_MAP_TYPE_DEVMAP* does not have it set.  This is particularly bad since accessing ingress_ifindex, e.g.  SEC(\"xdp\") int prog(struct xdp_md *pkt) {         return bpf_redirect_map(&dev_redirect_map, 0, 0); }  SEC(\"xdp/devmap\") int prog_after_redirect(struct xdp_md *pkt) {         bpf_printk(\"ifindex %i\", pkt-\u003eingress_ifindex);         return XDP_PASS; }  depends on access to rxq, so a NULL pointer gets dereferenced:  \u003c1\u003e[  574.475170] BUG: kernel NULL pointer dereference, address: 0000000000000000 \u003c1\u003e[  574.475188] #PF: supervisor read access in kernel mode \u003c1\u003e[  574.475194] #PF: error_code(0x0000) - not-present page \u003c6\u003e[  574.475199] PGD 0 P4D 0 \u003c4\u003e[  574.475207] Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI \u003c4\u003e[  574.475217] CPU: 4 UID: 0 PID: 217 Comm: kworker/4:1 Not tainted 6.11.0-rc5-reduced-00859-g780801200300 #23 \u003c4\u003e[  574.475226] Hardware name: Intel(R) Client Systems NUC13ANHi7/NUC13ANBi7, BIOS ANRPL357.0026.2023.0314.1458 03/14/2023 \u003c4\u003e[  574.475231] Workqueue: mld mld_ifc_work \u003c4\u003e[  574.475247] RIP: 0010:bpf_prog_5e13354d9cf5018a_prog_after_redirect+0x17/0x3c \u003c4\u003e[  574.475257] Code: cc cc cc cc cc cc cc 80 00 00 00 cc cc cc cc cc cc cc cc f3 0f 1e fa 0f 1f 44 00 00 66 90 55 48 89 e5 f3 0f 1e fa 48 8b 57 20 \u003c48\u003e 8b 52 00 8b 92 e0 00 00 00 48 bf f8 a6 d5 c4 5d a0 ff ff be 0b \u003c4\u003e[  574.475263] RSP: 0018:ffffa62440280c98 EFLAGS: 00010206 \u003c4\u003e[  574.475269] RAX: ffffa62440280cd8 RBX: 0000000000000001 RCX: 0000000000000000 \u003c4\u003e[  574.475274] RDX: 0000000000000000 RSI: ffffa62440549048 RDI: ffffa62440280ce0 \u003c4\u003e[  574.475278] RBP: ffffa62440280c98 R08: 0000000000000002 R09: 0000000000000001 \u003c4\u003e[  574.475281] R10: ffffa05dc8b98000 R11: ffffa05f577fca40 R12: ffffa05dcab24000 \u003c4\u003e[  574.475285] R13: ffffa62440280ce0 R14: ffffa62440549048 R15: ffffa62440549000 \u003c4\u003e[  574.475289] FS:  0000000000000000(0000) GS:ffffa05f4f700000(0000) knlGS:0000000000000000 \u003c4\u003e[  574.475294] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 \u003c4\u003e[  574.475298] CR2: 0000000000000000 CR3: 000000025522e000 CR4: 0000000000f50ef0 \u003c4\u003e[  574.475303] PKRU: 55555554 \u003c4\u003e[  574.475306] Call Trace: \u003c4\u003e[  574.475313]  \u003cIRQ\u003e \u003c4\u003e[  574.475318]  ? __die+0x23/0x70 \u003c4\u003e[  574.475329]  ? page_fault_oops+0x180/0x4c0 \u003c4\u003e[  574.475339]  ? skb_pp_cow_data+0x34c/0x490 \u003c4\u003e[  574.475346]  ? kmem_cache_free+0x257/0x280 \u003c4\u003e[  574.475357]  ? exc_page_fault+0x67/0x150 \u003c4\u003e[  574.475368]  ? asm_exc_page_fault+0x26/0x30 \u003c4\u003e[  574.475381]  ? bpf_prog_5e13354d9cf5018a_prog_after_redirect+0x17/0x3c \u003c4\u003e[  574.475386]  bq_xmit_all+0x158/0x420 \u003c4\u003e[  574.475397]  __dev_flush+0x30/0x90 \u003c4\u003e[  574.475407]  veth_poll+0x216/0x250 [veth] \u003c4\u003e[  574.475421]  __napi_poll+0x28/0x1c0 \u003c4\u003e[  574.475430]  net_rx_action+0x32d/0x3a0 \u003c4\u003e[  574.475441]  handle_softirqs+0xcb/0x2c0 \u003c4\u003e[  574.475451]  do_softirq+0x40/0x60 \u003c4\u003e[  574.475458]  \u003c/IRQ\u003e \u003c4\u003e[  574.475461]  \u003cTASK\u003e \u003c4\u003e[  574.475464]  __local_bh_enable_ip+0x66/0x70 \u003c4\u003e[  574.475471]  __dev_queue_xmit+0x268/0xe40 \u003c4\u003e[  574.475480]  ? selinux_ip_postroute+0x213/0x420 \u003c4\u003e[  574.475491]  ? alloc_skb_with_frags+0x4a/0x1d0 \u003c4\u003e[  574.475502]  ip6_finish_output2+0x2be/0x640 \u003c4\u003e[  574.475512]  ? nf_hook_slow+0x42/0xf0 \u003c4\u003e[  574.475521]  ip6_finish_output+0x194/0x300 \u003c4\u003e[  574.475529]  ? __pfx_ip6_finish_output+0x10/0x10 \u003c4\u003e[  574.475538]  mld_sendpack+0x17c/0x240 \u003c4\u003e[  574.475548]  mld_ifc_work+0x192/0x410 \u003c4\u003e[  574.475557]  process_one_work+0x15d/0x380 \u003c4\u003e[  574.475566]  worker_thread+0x29d/0x3a0 \u003c4\u003e[  574.475573]  ? __pfx_worker_thread+0x10/0x10 \u003c4\u003e[  574.475580]  ? __pfx_worker_thread+0x10/0x10 \u003c4\u003e[  574.475587]  kthread+0xcd/0x100 \u003c4\u003e[  574.475597]  ? __pfx_kthread+0x10/0x10 \u003c4\u003e[  574.475606]  ret_from_fork+0x31/0x50 \u003c4\u003e[  574.475615]  ? __pfx_kthread+0x10/0x10 \u003c4\u003e[  574.475623]  ret_from_fork_asm+0x1a/0x ---truncated---","modified":"2026-09-15T09:03:14.122760029Z","published":"2024-11-07T10:15:07.553Z","upstream":["CVE-2024-50162"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-50162"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.115-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2024-50162.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.11.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2024-50162.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.11.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2024-50162.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"}]}