CVE-2022-50126

{"id": "CVE-2022-50126", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "[email protected]", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2025-06-18T11:15:42.360", "references": [{"url": "https://git.kernel.org/stable/c/0f61c6dc4b714be9d79cf0782ca02ba01c1b7ac3", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/4a734f0869f970b8a9b65062ea40b09a5da9dba8", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/6073389db83b903678a0920554fa19f5bdc51c48", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/731c1662d838fe954c6759e3ee43229b0d928fe4", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ddd896792e1718cb84c96f3e618270589b6886dc", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e62f79827784f56499a50ea2e893c98317b5407b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/f7161d0da975adc234161cd0641d0e484f5ce375", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/fa5b65d39332fef7a11ae99cb1f0696012a61527", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "[email protected]", "description": [{"lang": "en", "value": "CWE-617"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\njbd2: fix assertion 'jh->b_frozen_data == NULL' failure when journal aborted\n\nFollowing process will fail assertion 'jh->b_frozen_data == NULL' in\njbd2_journal_dirty_metadata():\n\n jbd2_journal_commit_transaction\nunlink(dir/a)\n jh->b_transaction = trans1\n jh->b_jlist = BJ_Metadata\n journal->j_running_transaction = NULL\n trans1->t_state = T_COMMIT\nunlink(dir/b)\n handle->h_trans = trans2\n do_get_write_access\n jh->b_modified = 0\n jh->b_frozen_data = frozen_buffer\n jh->b_next_transaction = trans2\n jbd2_journal_dirty_metadata\n is_handle_aborted\n is_journal_aborted // return false\n\n --> jbd2 abort <--\n\n while (commit_transaction->t_buffers)\n if (is_journal_aborted)\n jbd2_journal_refile_buffer\n __jbd2_journal_refile_buffer\n WRITE_ONCE(jh->b_transaction,\n\t\t\t\t\t\tjh->b_next_transaction)\n WRITE_ONCE(jh->b_next_transaction, NULL)\n __jbd2_journal_file_buffer(jh, BJ_Reserved)\n J_ASSERT_JH(jh, jh->b_frozen_data == NULL) // assertion failure !\n\nThe reproducer (See detail in [Link]) reports:\n ------------[ cut here ]------------\n kernel BUG at fs/jbd2/transaction.c:1629!\n invalid opcode: 0000 [#1] PREEMPT SMP\n CPU: 2 PID: 584 Comm: unlink Tainted: G W\n 5.19.0-rc6-00115-g4a57a8400075-dirty #697\n RIP: 0010:jbd2_journal_dirty_metadata+0x3c5/0x470\n RSP: 0018:ffffc90000be7ce0 EFLAGS: 00010202\n Call Trace:\n <TASK>\n __ext4_handle_dirty_metadata+0xa0/0x290\n ext4_handle_dirty_dirblock+0x10c/0x1d0\n ext4_delete_entry+0x104/0x200\n __ext4_unlink+0x22b/0x360\n ext4_unlink+0x275/0x390\n vfs_unlink+0x20b/0x4c0\n do_unlinkat+0x42f/0x4c0\n __x64_sys_unlink+0x37/0x50\n do_syscall_64+0x35/0x80\n\nAfter journal aborting, __jbd2_journal_refile_buffer() is executed with\nholding @jh->b_state_lock, we can fix it by moving 'is_handle_aborted()'\ninto the area protected by @jh->b_state_lock."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: jbd2: se corrige el error de aserci\u00f3n 'jh-&gt;b_frozen_data == NULL' cuando se aborta el diario El siguiente proceso fallar\u00e1 la aserci\u00f3n 'jh-&gt;b_frozen_data == NULL' en jbd2_journal_dirty_metadata(): jbd2_journal_commit_transaction unlink(dir/a) jh-&gt;b_transaction = trans1 jh-&gt;b_jlist = BJ_Metadata journal-&gt;j_running_transaction = NULL trans1-&gt;t_state = T_COMMIT unlink(dir/b) handle-&gt;h_trans = trans2 do_get_write_access jh-&gt;b_modified = 0 jh-&gt;b_frozen_data = frozen_buffer jh-&gt;b_next_transaction = trans2 jbd2_journal_dirty_metadata is_handle_aborted is_journal_aborted // devuelve falso --&gt; jbd2 abort &lt;-- while (commit_transaction-&gt;t_buffers) if (is_journal_aborted) jbd2_journal_refile_buffer __jbd2_journal_refile_buffer WRITE_ONCE(jh-&gt;b_transaction, jh-&gt;b_next_transaction) WRITE_ONCE(jh-&gt;b_next_transaction, NULL) __jbd2_journal_file_buffer(jh, BJ_Reserved) J_ASSERT_JH(jh, jh-&gt;b_frozen_data == NULL) // \u00a1Fallo de aserci\u00f3n! El reproductor (ver detalles en [Enlace]) informa: ------------[ cortar aqu\u00ed ]------------ \u00a1ERROR del kernel en fs/jbd2/transaction.c:1629! c\u00f3digo de operaci\u00f3n no v\u00e1lido: 0000 [#1] PREEMPT SMP CPU: 2 PID: 584 Comm: desvincular Contaminado: GW 5.19.0-rc6-00115-g4a57a8400075-dirty #697 RIP: 0010:jbd2_journal_dirty_metadata+0x3c5/0x470 RSP: 0018:ffffc90000be7ce0 EFLAGS: 00010202 Rastreo de llamadas: __ext4_handle_dirty_metadata+0xa0/0x290 ext4_handle_dirty_dirblock+0x10c/0x1d0 ext4_delete_entry+0x104/0x200 __ext4_unlink+0x22b/0x360 ext4_unlink+0x275/0x390 vfs_unlink+0x20b/0x4c0 do_unlinkat+0x42f/0x4c0 __x64_sys_unlink+0x37/0x50 do_syscall_64+0x35/0x80 Despu\u00e9s de abortar el diario, se ejecuta __jbd2_journal_refile_buffer() manteniendo presionado @jh-&gt;b_state_lock. Podemos solucionarlo moviendo 'is_handle_aborted()' al \u00e1rea protegida por @jh-&gt;b_state_lock."}], "lastModified": "2025-11-18T18:11:46.243", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "622A407A-754C-4353-8055-EF60B3D7C0D9", "versionEndExcluding": "4.14.291", "versionStartIncluding": "2.6.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6C47CDE3-B039-4AE5-B8E4-1DC820E473FF", "versionEndExcluding": "4.19.256", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B1C63D19-C08C-4308-A848-B2523C9275BD", "versionEndExcluding": "5.4.211", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C2BF720F-C5EE-4DE2-9BDF-CE4CFBC767F4", "versionEndExcluding": "5.10.137", "versionStartIncluding": "5.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "51861563-7F40-460F-82CD-2D3FBDAD6618", "versionEndExcluding": "5.15.61", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5B42E453-8837-49D0-A5EF-03F818A6DC11", "versionEndExcluding": "5.18.18", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A1A2A5A5-4598-4D7E-BA07-4660398D6C8F", "versionEndExcluding": "5.19.2", "versionStartIncluding": "5.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.19:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9E2DBD4C-9DD9-4DD3-87CB-A0070A789CEA"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.19:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8D97ED16-D6B7-4445-889C-4D6DE2EDC49A"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.19:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B2C2D5D4-9A4B-4CDF-8D71-D22EB5E97D5A"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.19:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DFFB2843-A867-48EC-97D7-B106C7BBAED0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.19:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3CD3FE23-1A10-47E6-AD7E-D67F1BE3C5E2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:2.6.19:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9F39FC76-7D77-4064-94D3-A16C436FA8D1"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}