CVE-2025-71123

{"id": "CVE-2025-71123", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "b2bac84fde28fb6a88817b8b761abda17a1d300b", "lessThan": "52ac96c4a2dd7bc47666000440b0602d9742e820", "versionType": "git"}, {"status": "affected", "version": "e651294218d2684302ee5ed95ccf381646f3e5b4", "lessThan": "6e37143560e37869d51b7d9e0ac61fc48895f8a0", "versionType": "git"}, {"status": "affected", "version": "01829af7656b56d83682b3491265d583d502e502", "lessThan": "902ca2356f1e3ec5355c5808ad5d3f9d0095b0cc", "versionType": "git"}, {"status": "affected", "version": "2a0cf438320cdb783e0378570744c0ef0d83e934", "lessThan": "db9ee13fab0267eccf6544ee35b16c9522db9aac", "versionType": "git"}, {"status": "affected", "version": "8ecb790ea8c3fc69e77bace57f14cf0d7c177bd8", "lessThan": "5bbacbbf1ca4419861dca3c6b82707c10e9c021c", "versionType": "git"}, {"status": "affected", "version": "8ecb790ea8c3fc69e77bace57f14cf0d7c177bd8", "lessThan": "ee5a977b4e771cc181f39d504426dbd31ed701cc", "versionType": "git"}, {"status": "affected", "version": "7bf46ff83a0ef11836e38ebd72cdc5107209342d", "versionType": "git"}, {"status": "affected", "version": "a6e94557cd05adc82fae0400f6e17745563e5412", "versionType": "git"}, {"status": "affected", "version": "5.10.246", "lessThan": "5.10.248", "versionType": "semver"}, {"status": "affected", "version": "6.1.158", "lessThan": "6.1.160", "versionType": "semver"}, {"status": "affected", "version": "6.6.114", "lessThan": "6.6.120", "versionType": "semver"}, {"status": "affected", "version": "6.12.54", "lessThan": "6.12.64", "versionType": "semver"}, {"status": "affected", "version": "5.4.301", "lessThan": "5.5", "versionType": "semver"}, {"status": "affected", "version": "6.17.4", "lessThan": "6.18", "versionType": "semver"}], "programFiles": ["fs/ext4/super.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.18"}, {"status": "unaffected", "version": "0", "lessThan": "6.18", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.248", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "6.1.160", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.120", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.64", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.3", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/ext4/super.c"], "defaultStatus": "affected"}]}], "published": "2026-01-14T15:16:02.000", "references": [{"url": "https://git.kernel.org/stable/c/52ac96c4a2dd7bc47666000440b0602d9742e820", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/5bbacbbf1ca4419861dca3c6b82707c10e9c021c", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/6e37143560e37869d51b7d9e0ac61fc48895f8a0", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/902ca2356f1e3ec5355c5808ad5d3f9d0095b0cc", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/db9ee13fab0267eccf6544ee35b16c9522db9aac", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ee5a977b4e771cc181f39d504426dbd31ed701cc", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix string copying in parse_apply_sb_mount_options()\n\nstrscpy_pad() can't be used to copy a non-NUL-term string into a NUL-term\nstring of possibly bigger size. Commit 0efc5990bca5 (\"string.h: Introduce\nmemtostr() and memtostr_pad()\") provides additional information in that\nregard. So if this happens, the following warning is observed:\n\nstrnlen: detected buffer overflow: 65 byte read of buffer size 64\nWARNING: CPU: 0 PID: 28655 at lib/string_helpers.c:1032 __fortify_report+0x96/0xc0 lib/string_helpers.c:1032\nModules linked in:\nCPU: 0 UID: 0 PID: 28655 Comm: syz-executor.3 Not tainted 6.12.54-syzkaller-00144-g5f0270f1ba00 #0\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\nRIP: 0010:__fortify_report+0x96/0xc0 lib/string_helpers.c:1032\nCall Trace:\n <TASK>\n __fortify_panic+0x1f/0x30 lib/string_helpers.c:1039\n strnlen include/linux/fortify-string.h:235 [inline]\n sized_strscpy include/linux/fortify-string.h:309 [inline]\n parse_apply_sb_mount_options fs/ext4/super.c:2504 [inline]\n __ext4_fill_super fs/ext4/super.c:5261 [inline]\n ext4_fill_super+0x3c35/0xad00 fs/ext4/super.c:5706\n get_tree_bdev_flags+0x387/0x620 fs/super.c:1636\n vfs_get_tree+0x93/0x380 fs/super.c:1814\n do_new_mount fs/namespace.c:3553 [inline]\n path_mount+0x6ae/0x1f70 fs/namespace.c:3880\n do_mount fs/namespace.c:3893 [inline]\n __do_sys_mount fs/namespace.c:4103 [inline]\n __se_sys_mount fs/namespace.c:4080 [inline]\n __x64_sys_mount+0x280/0x300 fs/namespace.c:4080\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0x64/0x140 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nSince userspace is expected to provide s_mount_opts field to be at most 63\ncharacters long with the ending byte being NUL-term, use a 64-byte buffer\nwhich matches the size of s_mount_opts, so that strscpy_pad() does its job\nproperly. Return with error if the user still managed to provide a\nnon-NUL-term string here.\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\next4: corrige la copia de cadenas en parse_apply_sb_mount_options()\n\nstrscpy_pad() no puede usarse para copiar una cadena no terminada en NUL en una cadena terminada en NUL de tama\u00f1o posiblemente mayor. El commit 0efc5990bca5 ('string.h: Introduce memtostr() y memtostr_pad()') proporciona informaci\u00f3n adicional al respecto. As\u00ed que si esto ocurre, se observa la siguiente advertencia:\n\nstrnlen: desbordamiento de b\u00fafer detectado: lectura de 65 bytes de un b\u00fafer de tama\u00f1o 64\nADVERTENCIA: CPU: 0 PID: 28655 en lib/string_helpers.c:1032 __fortify_report+0x96/0xc0 lib/string_helpers.c:1032\nM\u00f3dulos enlazados:\nCPU: 0 UID: 0 PID: 28655 Comm: syz-executor.3 No contaminado 6.12.54-syzkaller-00144-g5f0270f1ba00 #0\nNombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\nRIP: 0010:__fortify_report+0x96/0xc0 lib/string_helpers.c:1032\nTraza de llamada:\n \n __fortify_panic+0x1f/0x30 lib/string_helpers.c:1039\n strnlen include/linux/fortify-string.h:235 [en l\u00ednea]\n sized_strscpy include/linux/fortify-string.h:309 [en l\u00ednea]\n parse_apply_sb_mount_options fs/ext4/super.c:2504 [en l\u00ednea]\n __ext4_fill_super fs/ext4/super.c:5261 [en l\u00ednea]\n ext4_fill_super+0x3c35/0xad00 fs/ext4/super.c:5706\n get_tree_bdev_flags+0x387/0x620 fs/super.c:1636\n vfs_get_tree+0x93/0x380 fs/super.c:1814\n do_new_mount fs/namespace.c:3553 [en l\u00ednea]\n path_mount+0x6ae/0x1f70 fs/namespace.c:3880\n do_mount fs/namespace.c:3893 [en l\u00ednea]\n __do_sys_mount fs/namespace.c:4103 [en l\u00ednea]\n __se_sys_mount fs/namespace.c:4080 [en l\u00ednea]\n __x64_sys_mount+0x280/0x300 fs/namespace.c:4080\n do_syscall_x64 arch/x86/entry/common.c:52 [en l\u00ednea]\n do_syscall_64+0x64/0x140 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nDado que se espera que el espacio de usuario proporcione el campo s_mount_opts de una longitud m\u00e1xima de 63 caracteres con el byte final terminado en NUL, use un b\u00fafer de 64 bytes que coincida con el tama\u00f1o de s_mount_opts, para que strscpy_pad() realice su trabajo correctamente. Devuelve un error si el usuario a\u00fan logr\u00f3 proporcionar una cadena no terminada en NUL aqu\u00ed.\n\nEncontrado por el Centro de Verificaci\u00f3n de Linux (linuxtesting.org) con Syzkaller."}], "lastModified": "2026-06-17T10:03:42.637", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "ABCD8233-CFD6-4194-AA34-BD9E287307E3", "versionEndExcluding": "5.5", "versionStartIncluding": "5.4.301"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B493FE88-E93E-41E6-905B-84D636E8D995", "versionEndExcluding": "5.10.248", "versionStartIncluding": "5.10.246"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5D82DB41-FE37-4DBE-90D1-55838504A12B", "versionEndExcluding": "6.1.160", "versionStartIncluding": "6.1.158"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "132C353E-B372-43F7-9F5D-81FDECC04B27", "versionEndExcluding": "6.6.120", "versionStartIncluding": "6.6.114"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0B335F73-3E9B-471B-AE8B-F4192A2CC5E4", "versionEndExcluding": "6.12.64", "versionStartIncluding": "6.12.54"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "03CF48C0-2F25-4797-9371-AD6932300161", "versionEndExcluding": "6.18", "versionStartIncluding": "6.17.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A3586EB6-087D-41EA-AD79-2AA54D44AAA1", "versionEndExcluding": "6.18.3", "versionStartIncluding": "6.18.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.18:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DCE57113-2223-4308-A0F2-5E6ECFBB3C23"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "17B67AA7-40D6-4AFA-8459-F200F3D7CFD1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C47E4CC9-C826-4FA9-B014-7FE3D9B318B2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F71D92C0-C023-48BD-B3B6-70B638EEE298"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "13580667-0A98-40CC-B29F-D12790B91BDB"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3EF854A1-ABB1-4E93-BE9A-44569EC76C0D"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F5DC0CA6-F0AF-4DDF-A882-3DADB9A886A7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EB5B7DFC-C36B-45D8-922C-877569FDDF43"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}