{ "dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": { "cveId": "CVE-2022-48940", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-08-22T01:27:53.623Z", "datePublished": "2024-08-22T03:31:35.844Z", "dateUpdated": "2024-09-12T17:32:59.231Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-08-22T03:31:35.844Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix crash due to incorrect copy_map_value\n\nWhen both bpf_spin_lock and bpf_timer are present in a BPF map value,\ncopy_map_value needs to skirt both objects when copying a value into and\nout of the map. However, the current code does not set both s_off and\nt_off in copy_map_value, which leads to a crash when e.g. bpf_spin_lock\nis placed in map value with bpf_timer, as bpf_map_update_elem call will\nbe able to overwrite the other timer object.\n\nWhen the issue is not fixed, an overwriting can produce the following\nsplat:\n\n[root@(none) bpf]# ./test_progs -t timer_crash\n[ 15.930339] bpf_testmod: loading out-of-tree module taints kernel.\n[ 16.037849] ==================================================================\n[ 16.038458] BUG: KASAN: user-memory-access in __pv_queued_spin_lock_slowpath+0x32b/0x520\n[ 16.038944] Write of size 8 at addr 0000000000043ec0 by task test_progs/325\n[ 16.039399]\n[ 16.039514] CPU: 0 PID: 325 Comm: test_progs Tainted: G OE 5.16.0+ #278\n[ 16.039983] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ArchLinux 1.15.0-1 04/01/2014\n[ 16.040485] Call Trace:\n[ 16.040645] \n[ 16.040805] dump_stack_lvl+0x59/0x73\n[ 16.041069] ? __pv_queued_spin_lock_slowpath+0x32b/0x520\n[ 16.041427] kasan_report.cold+0x116/0x11b\n[ 16.041673] ? __pv_queued_spin_lock_slowpath+0x32b/0x520\n[ 16.042040] __pv_queued_spin_lock_slowpath+0x32b/0x520\n[ 16.042328] ? memcpy+0x39/0x60\n[ 16.042552] ? pv_hash+0xd0/0xd0\n[ 16.042785] ? lockdep_hardirqs_off+0x95/0xd0\n[ 16.043079] __bpf_spin_lock_irqsave+0xdf/0xf0\n[ 16.043366] ? bpf_get_current_comm+0x50/0x50\n[ 16.043608] ? jhash+0x11a/0x270\n[ 16.043848] bpf_timer_cancel+0x34/0xe0\n[ 16.044119] bpf_prog_c4ea1c0f7449940d_sys_enter+0x7c/0x81\n[ 16.044500] bpf_trampoline_6442477838_0+0x36/0x1000\n[ 16.044836] __x64_sys_nanosleep+0x5/0x140\n[ 16.045119] do_syscall_64+0x59/0x80\n[ 16.045377] ? lock_is_held_type+0xe4/0x140\n[ 16.045670] ? irqentry_exit_to_user_mode+0xa/0x40\n[ 16.046001] ? mark_held_locks+0x24/0x90\n[ 16.046287] ? asm_exc_page_fault+0x1e/0x30\n[ 16.046569] ? asm_exc_page_fault+0x8/0x30\n[ 16.046851] ? lockdep_hardirqs_on+0x7e/0x100\n[ 16.047137] entry_SYSCALL_64_after_hwframe+0x44/0xae\n[ 16.047405] RIP: 0033:0x7f9e4831718d\n[ 16.047602] Code: b4 0c 00 0f 05 eb a9 66 0f 1f 44 00 00 f3 0f 1e fa 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 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d b3 6c 0c 00 f7 d8 64 89 01 48\n[ 16.048764] RSP: 002b:00007fff488086b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000023\n[ 16.049275] RAX: ffffffffffffffda RBX: 00007f9e48683740 RCX: 00007f9e4831718d\n[ 16.049747] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fff488086d0\n[ 16.050225] RBP: 00007fff488086f0 R08: 00007fff488085d7 R09: 00007f9e4cb594a0\n[ 16.050648] R10: 0000000000000000 R11: 0000000000000206 R12: 00007f9e484cde30\n[ 16.051124] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\n[ 16.051608] \n[ 16.051762] ==================================================================" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/linux/bpf.h" ], "versions": [ { "version": "68134668c17f", "lessThan": "719d1c2524c8", "status": "affected", "versionType": "git" }, { "version": "68134668c17f", "lessThan": "eca9bd215d22", "status": "affected", "versionType": "git" }, { "version": "68134668c17f", "lessThan": "a8abb0c3dc1e", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/linux/bpf.h" ], "versions": [ { "version": "5.15", "status": "affected" }, { "version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.26", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.16.12", "lessThanOrEqual": "5.16.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.17", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/719d1c2524c89ada78c4c9202641c1d9e942a322" }, { "url": "https://git.kernel.org/stable/c/eca9bd215d2233de79d930fa97aefbce03247a98" }, { "url": "https://git.kernel.org/stable/c/a8abb0c3dc1e28454851a00f8b7333d9695d566c" } ], "title": "bpf: Fix crash due to incorrect copy_map_value", "x_generator": { "engine": "bippy-c9c4e1df01b2" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2022-48940", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T15:32:21.126516Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-12T17:32:59.231Z" } } ] } }