{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-40138", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.171Z", "datePublished": "2025-11-12T10:23:23.912Z", "dateUpdated": "2026-05-11T21:43:29.612Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:43:29.612Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid NULL pointer dereference in f2fs_check_quota_consistency()\n\nsyzbot reported a f2fs bug as below:\n\nOops: gen[ 107.736417][ T5848] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nCPU: 1 UID: 0 PID: 5848 Comm: syz-executor263 Tainted: G W 6.17.0-rc1-syzkaller-00014-g0e39a731820a #0 PREEMPT_{RT,(full)}\nRIP: 0010:strcmp+0x3c/0xc0 lib/string.c:284\nCall Trace:\n <TASK>\n f2fs_check_quota_consistency fs/f2fs/super.c:1188 [inline]\n f2fs_check_opt_consistency+0x1378/0x2c10 fs/f2fs/super.c:1436\n __f2fs_remount fs/f2fs/super.c:2653 [inline]\n f2fs_reconfigure+0x482/0x1770 fs/f2fs/super.c:5297\n reconfigure_super+0x224/0x890 fs/super.c:1077\n do_remount fs/namespace.c:3314 [inline]\n path_mount+0xd18/0xfe0 fs/namespace.c:4112\n do_mount fs/namespace.c:4133 [inline]\n __do_sys_mount fs/namespace.c:4344 [inline]\n __se_sys_mount+0x317/0x410 fs/namespace.c:4321\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nThe direct reason is f2fs_check_quota_consistency() may suffer null-ptr-deref\nissue in strcmp().\n\nThe bug can be reproduced w/ below scripts:\nmkfs.f2fs -f /dev/vdb\nmount -t f2fs -o usrquota /dev/vdb /mnt/f2fs\nquotacheck -uc /mnt/f2fs/\numount /mnt/f2fs\nmount -t f2fs -o usrjquota=aquota.user,jqfmt=vfsold /dev/vdb /mnt/f2fs\nmount -t f2fs -o remount,usrjquota=,jqfmt=vfsold /dev/vdb /mnt/f2fs\numount /mnt/f2fs\n\nSo, before old_qname and new_qname comparison, we need to check whether\nthey are all valid pointers, fix it."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/f2fs/super.c"], "versions": [{"version": "d185351325237da688de006a2c579e82ea97bdfe", "lessThan": "3f3458852bbfe79c60f2412b8b04677b96688b6e", "status": "affected", "versionType": "git"}, {"version": "d185351325237da688de006a2c579e82ea97bdfe", "lessThan": "930a9a6ee8e7ffa20af4bffbfc2bbd21d83bf81c", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/f2fs/super.c"], "versions": [{"version": "6.17", "status": "affected"}, {"version": "0", "lessThan": "6.17", "status": "unaffected", "versionType": "semver"}, {"version": "6.17.3", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18", "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": "6.17", "versionEndExcluding": "6.17.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17", "versionEndExcluding": "6.18"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/3f3458852bbfe79c60f2412b8b04677b96688b6e"}, {"url": "https://git.kernel.org/stable/c/930a9a6ee8e7ffa20af4bffbfc2bbd21d83bf81c"}], "title": "f2fs: fix to avoid NULL pointer dereference in f2fs_check_quota_consistency()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid NULL pointer dereference in f2fs_check_quota_consistency()\n\nsyzbot reported a f2fs bug as below:\n\nOops: gen[ 107.736417][ T5848] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nCPU: 1 UID: 0 PID: 5848 Comm: syz-executor263 Tainted: G W 6.17.0-rc1-syzkaller-00014-g0e39a731820a #0 PREEMPT_{RT,(full)}\nRIP: 0010:strcmp+0x3c/0xc0 lib/string.c:284\nCall Trace:\n <TASK>\n f2fs_check_quota_consistency fs/f2fs/super.c:1188 [inline]\n f2fs_check_opt_consistency+0x1378/0x2c10 fs/f2fs/super.c:1436\n __f2fs_remount fs/f2fs/super.c:2653 [inline]\n f2fs_reconfigure+0x482/0x1770 fs/f2fs/super.c:5297\n reconfigure_super+0x224/0x890 fs/super.c:1077\n do_remount fs/namespace.c:3314 [inline]\n path_mount+0xd18/0xfe0 fs/namespace.c:4112\n do_mount fs/namespace.c:4133 [inline]\n __do_sys_mount fs/namespace.c:4344 [inline]\n __se_sys_mount+0x317/0x410 fs/namespace.c:4321\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nThe direct reason is f2fs_check_quota_consistency() may suffer null-ptr-deref\nissue in strcmp().\n\nThe bug can be reproduced w/ below scripts:\nmkfs.f2fs -f /dev/vdb\nmount -t f2fs -o usrquota /dev/vdb /mnt/f2fs\nquotacheck -uc /mnt/f2fs/\numount /mnt/f2fs\nmount -t f2fs -o usrjquota=aquota.user,jqfmt=vfsold /dev/vdb /mnt/f2fs\nmount -t f2fs -o remount,usrjquota=,jqfmt=vfsold /dev/vdb /mnt/f2fs\numount /mnt/f2fs\n\nSo, before old_qname and new_qname comparison, we need to check whether\nthey are all valid pointers, fix it."}], "id": "CVE-2025-40138", "lastModified": "2026-04-15T00:35:42.020", "metrics": {}, "published": "2025-11-12T11:15:43.553", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3f3458852bbfe79c60f2412b8b04677b96688b6e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/930a9a6ee8e7ffa20af4bffbfc2bbd21d83bf81c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: f2fs: fix to avoid NULL pointer dereference in f2fs_check_quota_consistency()", "id": "2414507", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2414507"}, "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:\nf2fs: fix to avoid NULL pointer dereference in f2fs_check_quota_consistency()\nsyzbot reported a f2fs bug as below:\nOops: gen[ 107.736417][ T5848] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nCPU: 1 UID: 0 PID: 5848 Comm: syz-executor263 Tainted: G W 6.17.0-rc1-syzkaller-00014-g0e39a731820a #0 PREEMPT_{RT,(full)}\nRIP: 0010:strcmp+0x3c/0xc0 lib/string.c:284\nCall Trace:\n<TASK>\nf2fs_check_quota_consistency fs/f2fs/super.c:1188 [inline]\nf2fs_check_opt_consistency+0x1378/0x2c10 fs/f2fs/super.c:1436\n__f2fs_remount fs/f2fs/super.c:2653 [inline]\nf2fs_reconfigure+0x482/0x1770 fs/f2fs/super.c:5297\nreconfigure_super+0x224/0x890 fs/super.c:1077\ndo_remount fs/namespace.c:3314 [inline]\npath_mount+0xd18/0xfe0 fs/namespace.c:4112\ndo_mount fs/namespace.c:4133 [inline]\n__do_sys_mount fs/namespace.c:4344 [inline]\n__se_sys_mount+0x317/0x410 fs/namespace.c:4321\ndo_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\ndo_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94\nentry_SYSCALL_64_after_hwframe+0x77/0x7f\nThe direct reason is f2fs_check_quota_consistency() may suffer null-ptr-deref\nissue in strcmp().\nThe bug can be reproduced w/ below scripts:\nmkfs.f2fs -f /dev/vdb\nmount -t f2fs -o usrquota /dev/vdb /mnt/f2fs\nquotacheck -uc /mnt/f2fs/\numount /mnt/f2fs\nmount -t f2fs -o usrjquota=aquota.user,jqfmt=vfsold /dev/vdb /mnt/f2fs\nmount -t f2fs -o remount,usrjquota=,jqfmt=vfsold /dev/vdb /mnt/f2fs\numount /mnt/f2fs\nSo, before old_qname and new_qname comparison, we need to check whether\nthey are all valid pointers, fix it."], "name": "CVE-2025-40138", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-11-12T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-40138\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-40138\nhttps://lore.kernel.org/linux-cve-announce/2025111255-CVE-2025-40138-e96d@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-11-12T22:12:26.916988+00:00", "updated": "2025-11-12T22:12:26.917019+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}