{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2022-49802", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-05-01T14:05:17.225Z", "datePublished": "2025-05-01T14:09:30.308Z", "dateUpdated": "2025-05-04T08:45:39.803Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T08:45:39.803Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nftrace: Fix null pointer dereference in ftrace_add_mod()\n\nThe @ftrace_mod is allocated by kzalloc(), so both the members {prev,next}\nof @ftrace_mode->list are NULL, it's not a valid state to call list_del().\nIf kstrdup() for @ftrace_mod->{func|module} fails, it goes to @out_free\ntag and calls free_ftrace_mod() to destroy @ftrace_mod, then list_del()\nwill write prev->next and next->prev, where null pointer dereference\nhappens.\n\nBUG: kernel NULL pointer dereference, address: 0000000000000008\nOops: 0002 [#1] PREEMPT SMP NOPTI\nCall Trace:\n <TASK>\n ftrace_mod_callback+0x20d/0x220\n ? do_filp_open+0xd9/0x140\n ftrace_process_regex.isra.51+0xbf/0x130\n ftrace_regex_write.isra.52.part.53+0x6e/0x90\n vfs_write+0xee/0x3a0\n ? __audit_filter_op+0xb1/0x100\n ? auditd_test_task+0x38/0x50\n ksys_write+0xa5/0xe0\n do_syscall_64+0x3a/0x90\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\nKernel panic - not syncing: Fatal exception\n\nSo call INIT_LIST_HEAD() to initialize the list member to fix this issue."}], "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": "673feb9d76ab3eddde7acfd94b206e321cfc90b9", "lessThan": "665b4c6648bf2b91f69b33817f4321cf4c3cafe9", "status": "affected", "versionType": "git"}, {"version": "673feb9d76ab3eddde7acfd94b206e321cfc90b9", "lessThan": "b5bfc61f541d3f092b13dedcfe000d86eb8e133c", "status": "affected", "versionType": "git"}, {"version": "673feb9d76ab3eddde7acfd94b206e321cfc90b9", "lessThan": "f715f31559b82e3f75ce047fa476de63d8107584", "status": "affected", "versionType": "git"}, {"version": "673feb9d76ab3eddde7acfd94b206e321cfc90b9", "lessThan": "6a14828caddad0d989495a72af678adf60992704", "status": "affected", "versionType": "git"}, {"version": "673feb9d76ab3eddde7acfd94b206e321cfc90b9", "lessThan": "1bea037a1abb23a6729bef36a2265a4565f5ea77", "status": "affected", "versionType": "git"}, {"version": "673feb9d76ab3eddde7acfd94b206e321cfc90b9", "lessThan": "6e50eb4b1807017f6c2d5089064256ce2de8aef1", "status": "affected", "versionType": "git"}, {"version": "673feb9d76ab3eddde7acfd94b206e321cfc90b9", "lessThan": "19ba6c8af9382c4c05dc6a0a79af3013b9a35cd0", "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": "4.13", "status": "affected"}, {"version": "0", "lessThan": "4.13", "status": "unaffected", "versionType": "semver"}, {"version": "4.14.300", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.267", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.225", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.156", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.80", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0.10", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1", "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": "4.13", "versionEndExcluding": "4.14.300"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "4.19.267"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "5.4.225"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "5.10.156"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "5.15.80"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.0.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/665b4c6648bf2b91f69b33817f4321cf4c3cafe9"}, {"url": "https://git.kernel.org/stable/c/b5bfc61f541d3f092b13dedcfe000d86eb8e133c"}, {"url": "https://git.kernel.org/stable/c/f715f31559b82e3f75ce047fa476de63d8107584"}, {"url": "https://git.kernel.org/stable/c/6a14828caddad0d989495a72af678adf60992704"}, {"url": "https://git.kernel.org/stable/c/1bea037a1abb23a6729bef36a2265a4565f5ea77"}, {"url": "https://git.kernel.org/stable/c/6e50eb4b1807017f6c2d5089064256ce2de8aef1"}, {"url": "https://git.kernel.org/stable/c/19ba6c8af9382c4c05dc6a0a79af3013b9a35cd0"}], "title": "ftrace: Fix null pointer dereference in ftrace_add_mod()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nftrace: Fix null pointer dereference in ftrace_add_mod()\n\nThe @ftrace_mod is allocated by kzalloc(), so both the members {prev,next}\nof @ftrace_mode->list are NULL, it's not a valid state to call list_del().\nIf kstrdup() for @ftrace_mod->{func|module} fails, it goes to @out_free\ntag and calls free_ftrace_mod() to destroy @ftrace_mod, then list_del()\nwill write prev->next and next->prev, where null pointer dereference\nhappens.\n\nBUG: kernel NULL pointer dereference, address: 0000000000000008\nOops: 0002 [#1] PREEMPT SMP NOPTI\nCall Trace:\n <TASK>\n ftrace_mod_callback+0x20d/0x220\n ? do_filp_open+0xd9/0x140\n ftrace_process_regex.isra.51+0xbf/0x130\n ftrace_regex_write.isra.52.part.53+0x6e/0x90\n vfs_write+0xee/0x3a0\n ? __audit_filter_op+0xb1/0x100\n ? auditd_test_task+0x38/0x50\n ksys_write+0xa5/0xe0\n do_syscall_64+0x3a/0x90\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\nKernel panic - not syncing: Fatal exception\n\nSo call INIT_LIST_HEAD() to initialize the list member to fix this issue."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ftrace: Corregir la desreferencia de puntero nulo en ftrace_add_mod() @ftrace_mod se asigna mediante kzalloc(), por lo que ambos miembros {prev,next} de @ftrace_mode-&gt;list son NULL, no es un estado v\u00e1lido para llamar a list_del(). Si kstrdup() para @ftrace_mod-&gt;{func|module} falla, va a la etiqueta @out_free y llama a free_ftrace_mod() para destruir @ftrace_mod, entonces list_del() escribir\u00e1 prev-&gt;next y next-&gt;prev, donde ocurre la desreferencia de puntero nulo. ERROR: desreferencia de puntero NULL del kernel, direcci\u00f3n: 0000000000000008 Oops: 0002 [#1] PREEMPT SMP NOPTI Call Trace: ftrace_mod_callback+0x20d/0x220 ? P\u00e1nico del kernel: no se sincroniza: Excepci\u00f3n fatal Por lo tanto, llame a INIT_LIST_HEAD() para inicializar el miembro de la lista para corregir este problema."}], "id": "CVE-2022-49802", "lastModified": "2025-05-02T13:53:20.943", "metrics": {}, "published": "2025-05-01T15:16:03.510", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/19ba6c8af9382c4c05dc6a0a79af3013b9a35cd0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1bea037a1abb23a6729bef36a2265a4565f5ea77"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/665b4c6648bf2b91f69b33817f4321cf4c3cafe9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6a14828caddad0d989495a72af678adf60992704"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6e50eb4b1807017f6c2d5089064256ce2de8aef1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b5bfc61f541d3f092b13dedcfe000d86eb8e133c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f715f31559b82e3f75ce047fa476de63d8107584"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: ftrace: Fix null pointer dereference in ftrace_add_mod()", "id": "2363471", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2363471"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nftrace: Fix null pointer dereference in ftrace_add_mod()\nThe @ftrace_mod is allocated by kzalloc(), so both the members {prev,next}\nof @ftrace_mode->list are NULL, it's not a valid state to call list_del().\nIf kstrdup() for @ftrace_mod->{func|module} fails, it goes to @out_free\ntag and calls free_ftrace_mod() to destroy @ftrace_mod, then list_del()\nwill write prev->next and next->prev, where null pointer dereference\nhappens.\nBUG: kernel NULL pointer dereference, address: 0000000000000008\nOops: 0002 [#1] PREEMPT SMP NOPTI\nCall Trace:\n<TASK>\nftrace_mod_callback+0x20d/0x220\n? do_filp_open+0xd9/0x140\nftrace_process_regex.isra.51+0xbf/0x130\nftrace_regex_write.isra.52.part.53+0x6e/0x90\nvfs_write+0xee/0x3a0\n? __audit_filter_op+0xb1/0x100\n? auditd_test_task+0x38/0x50\nksys_write+0xa5/0xe0\ndo_syscall_64+0x3a/0x90\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\nKernel panic - not syncing: Fatal exception\nSo call INIT_LIST_HEAD() to initialize the list member to fix this issue."], "name": "CVE-2022-49802", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49802\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49802\nhttps://lore.kernel.org/linux-cve-announce/2025050126-CVE-2022-49802-ee41@gregkh/T"], "statement": "The patch fixes a kernel NULL pointer dereference in the ftrace_add_mod() function. When memory allocation (kzalloc()) succeeds but subsequent kstrdup() fails, the error path calls list_del() on an uninitialized list head (ftrace_mod->list). This leads to a kernel panic due to prev->next or next->prev being NULL. This bug can be triggered by local privileged users (typically those interacting with Ftrace via debugfs or similar kernel tracing interfaces).", "threat_severity": "Moderate"}