{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49402", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T02:08:31.565Z", "datePublished": "2025-02-26T02:12:29.070Z", "dateUpdated": "2026-05-11T18:59:03.812Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T18:59:03.812Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nftrace: Clean up hash direct_functions on register failures\n\nWe see the following GPF when register_ftrace_direct fails:\n\n[ ] general protection fault, probably for non-canonical address \\\n 0x200000000000010: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC PTI\n[...]\n[ ] RIP: 0010:ftrace_find_rec_direct+0x53/0x70\n[ ] Code: 48 c1 e0 03 48 03 42 08 48 8b 10 31 c0 48 85 d2 74 [...]\n[ ] RSP: 0018:ffffc9000138bc10 EFLAGS: 00010206\n[ ] RAX: 0000000000000000 RBX: ffffffff813e0df0 RCX: 000000000000003b\n[ ] RDX: 0200000000000000 RSI: 000000000000000c RDI: ffffffff813e0df0\n[ ] RBP: ffffffffa00a3000 R08: ffffffff81180ce0 R09: 0000000000000001\n[ ] R10: ffffc9000138bc18 R11: 0000000000000001 R12: ffffffff813e0df0\n[ ] R13: ffffffff813e0df0 R14: ffff888171b56400 R15: 0000000000000000\n[ ] FS: 00007fa9420c7780(0000) GS:ffff888ff6a00000(0000) knlGS:000000000\n[ ] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ ] CR2: 000000000770d000 CR3: 0000000107d50003 CR4: 0000000000370ee0\n[ ] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[ ] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[ ] Call Trace:\n[ ] \n[ ] register_ftrace_direct+0x54/0x290\n[ ] ? render_sigset_t+0xa0/0xa0\n[ ] bpf_trampoline_update+0x3f5/0x4a0\n[ ] ? 0xffffffffa00a3000\n[ ] bpf_trampoline_link_prog+0xa9/0x140\n[ ] bpf_tracing_prog_attach+0x1dc/0x450\n[ ] bpf_raw_tracepoint_open+0x9a/0x1e0\n[ ] ? find_held_lock+0x2d/0x90\n[ ] ? lock_release+0x150/0x430\n[ ] __sys_bpf+0xbd6/0x2700\n[ ] ? lock_is_held_type+0xd8/0x130\n[ ] __x64_sys_bpf+0x1c/0x20\n[ ] do_syscall_64+0x3a/0x80\n[ ] entry_SYSCALL_64_after_hwframe+0x44/0xae\n[ ] RIP: 0033:0x7fa9421defa9\n[ ] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 9 f8 [...]\n[ ] RSP: 002b:00007ffed743bd78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141\n[ ] RAX: ffffffffffffffda RBX: 00000000069d2480 RCX: 00007fa9421defa9\n[ ] RDX: 0000000000000078 RSI: 00007ffed743bd80 RDI: 0000000000000011\n[ ] RBP: 00007ffed743be00 R08: 0000000000bb7270 R09: 0000000000000000\n[ ] R10: 00000000069da210 R11: 0000000000000246 R12: 0000000000000001\n[ ] R13: 00007ffed743c4b0 R14: 00000000069d2480 R15: 0000000000000001\n[ ] \n[ ] Modules linked in: klp_vm(OK)\n[ ] ---[ end trace 0000000000000000 ]---\n\nOne way to trigger this is:\n 1. load a livepatch that patches kernel function xxx;\n 2. run bpftrace -e 'kfunc:xxx {}', this will fail (expected for now);\n 3. repeat #2 => gpf.\n\nThis is because the entry is added to direct_functions, but not removed.\nFix this by remove the entry from direct_functions when\nregister_ftrace_direct fails.\n\nAlso remove the last trailing space from ftrace.c, so we don't have to\nworry about it anymore." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/trace/ftrace.c" ], "versions": [ { "version": "763e34e74bb7d5c316015e2e39fcc8520bfd071c", "lessThan": "82c888e51c2176a06f8b4541cf748ee81aac6e7e", "status": "affected", "versionType": "git" }, { "version": "763e34e74bb7d5c316015e2e39fcc8520bfd071c", "lessThan": "cae2978d6907ef2c08b9b15f704e783f7c284713", "status": "affected", "versionType": "git" }, { "version": "763e34e74bb7d5c316015e2e39fcc8520bfd071c", "lessThan": "805e87af946d8d2954171361e64d143ff37a441b", "status": "affected", "versionType": "git" }, { "version": "763e34e74bb7d5c316015e2e39fcc8520bfd071c", "lessThan": "a0392833a178cf109a57c2a9d4d531bdfc6cd98f", "status": "affected", "versionType": "git" }, { "version": "763e34e74bb7d5c316015e2e39fcc8520bfd071c", "lessThan": "7d54c15cb89a29a5f59e5ffc9ee62e6591769ef1", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/trace/ftrace.c" ], "versions": [ { "version": "5.5", "status": "affected" }, { "version": "0", "lessThan": "5.5", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.121", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.46", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.17.14", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.18.3", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.19", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.10.121" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.15.46" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.17.14" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.18.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.19" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/82c888e51c2176a06f8b4541cf748ee81aac6e7e" }, { "url": "https://git.kernel.org/stable/c/cae2978d6907ef2c08b9b15f704e783f7c284713" }, { "url": "https://git.kernel.org/stable/c/805e87af946d8d2954171361e64d143ff37a441b" }, { "url": "https://git.kernel.org/stable/c/a0392833a178cf109a57c2a9d4d531bdfc6cd98f" }, { "url": "https://git.kernel.org/stable/c/7d54c15cb89a29a5f59e5ffc9ee62e6591769ef1" } ], "title": "ftrace: Clean up hash direct_functions on register failures", "x_generator": { "engine": "bippy-1.2.0" } } } }