{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-40235", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.180Z", "datePublished": "2025-12-04T15:31:25.785Z", "dateUpdated": "2025-12-04T15:31:25.785Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-12-04T15:31:25.785Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: directly free partially initialized fs_info in btrfs_check_leaked_roots()\n\nIf fs_info->super_copy or fs_info->super_for_commit allocated failed in\nbtrfs_get_tree_subvol(), then no need to call btrfs_free_fs_info().\nOtherwise btrfs_check_leaked_roots() would access NULL pointer because\nfs_info->allocated_roots had not been initialised.\n\nsyzkaller reported the following information:\n ------------[ cut here ]------------\n BUG: unable to handle page fault for address: fffffffffffffbb0\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 64c9067 P4D 64c9067 PUD 64cb067 PMD 0\n Oops: Oops: 0000 [#1] SMP KASAN PTI\n CPU: 0 UID: 0 PID: 1402 Comm: syz.1.35 Not tainted 6.15.8 #4 PREEMPT(lazy)\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), (...)\n RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]\n RIP: 0010:raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]\n RIP: 0010:atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline]\n RIP: 0010:refcount_read include/linux/refcount.h:170 [inline]\n RIP: 0010:btrfs_check_leaked_roots+0x18f/0x2c0 fs/btrfs/disk-io.c:1230\n [...]\n Call Trace:\n <TASK>\n btrfs_free_fs_info+0x310/0x410 fs/btrfs/disk-io.c:1280\n btrfs_get_tree_subvol+0x592/0x6b0 fs/btrfs/super.c:2029\n btrfs_get_tree+0x63/0x80 fs/btrfs/super.c:2097\n vfs_get_tree+0x98/0x320 fs/super.c:1759\n do_new_mount+0x357/0x660 fs/namespace.c:3899\n path_mount+0x716/0x19c0 fs/namespace.c:4226\n do_mount fs/namespace.c:4239 [inline]\n __do_sys_mount fs/namespace.c:4450 [inline]\n __se_sys_mount fs/namespace.c:4427 [inline]\n __x64_sys_mount+0x28c/0x310 fs/namespace.c:4427\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0x92/0x180 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n RIP: 0033:0x7f032eaffa8d\n [...]"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/btrfs/super.c"], "versions": [{"version": "3bb17a25bcb09abbd667c6ac86c7c9109ae82bcd", "lessThan": "b1c2b4e6ffd307720ab6ce42f6749b0c02ba0a73", "status": "affected", "versionType": "git"}, {"version": "3bb17a25bcb09abbd667c6ac86c7c9109ae82bcd", "lessThan": "0c2b2d4d053e9840e6da6ed581befa20309f281a", "status": "affected", "versionType": "git"}, {"version": "3bb17a25bcb09abbd667c6ac86c7c9109ae82bcd", "lessThan": "17679ac6df6c4830ba711835aa8cf961be36cfa1", "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/btrfs/super.c"], "versions": [{"version": "6.8", "status": "affected"}, {"version": "0", "lessThan": "6.8", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.56", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17.6", "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": "6.8", "versionEndExcluding": "6.12.56"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.17.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.18"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b1c2b4e6ffd307720ab6ce42f6749b0c02ba0a73"}, {"url": "https://git.kernel.org/stable/c/0c2b2d4d053e9840e6da6ed581befa20309f281a"}, {"url": "https://git.kernel.org/stable/c/17679ac6df6c4830ba711835aa8cf961be36cfa1"}], "title": "btrfs: directly free partially initialized fs_info in btrfs_check_leaked_roots()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: directly free partially initialized fs_info in btrfs_check_leaked_roots()\n\nIf fs_info->super_copy or fs_info->super_for_commit allocated failed in\nbtrfs_get_tree_subvol(), then no need to call btrfs_free_fs_info().\nOtherwise btrfs_check_leaked_roots() would access NULL pointer because\nfs_info->allocated_roots had not been initialised.\n\nsyzkaller reported the following information:\n ------------[ cut here ]------------\n BUG: unable to handle page fault for address: fffffffffffffbb0\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 64c9067 P4D 64c9067 PUD 64cb067 PMD 0\n Oops: Oops: 0000 [#1] SMP KASAN PTI\n CPU: 0 UID: 0 PID: 1402 Comm: syz.1.35 Not tainted 6.15.8 #4 PREEMPT(lazy)\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), (...)\n RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]\n RIP: 0010:raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]\n RIP: 0010:atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline]\n RIP: 0010:refcount_read include/linux/refcount.h:170 [inline]\n RIP: 0010:btrfs_check_leaked_roots+0x18f/0x2c0 fs/btrfs/disk-io.c:1230\n [...]\n Call Trace:\n <TASK>\n btrfs_free_fs_info+0x310/0x410 fs/btrfs/disk-io.c:1280\n btrfs_get_tree_subvol+0x592/0x6b0 fs/btrfs/super.c:2029\n btrfs_get_tree+0x63/0x80 fs/btrfs/super.c:2097\n vfs_get_tree+0x98/0x320 fs/super.c:1759\n do_new_mount+0x357/0x660 fs/namespace.c:3899\n path_mount+0x716/0x19c0 fs/namespace.c:4226\n do_mount fs/namespace.c:4239 [inline]\n __do_sys_mount fs/namespace.c:4450 [inline]\n __se_sys_mount fs/namespace.c:4427 [inline]\n __x64_sys_mount+0x28c/0x310 fs/namespace.c:4427\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0x92/0x180 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n RIP: 0033:0x7f032eaffa8d\n [...]"}], "id": "CVE-2025-40235", "lastModified": "2025-12-04T17:15:08.283", "metrics": {}, "published": "2025-12-04T16:16:16.407", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0c2b2d4d053e9840e6da6ed581befa20309f281a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/17679ac6df6c4830ba711835aa8cf961be36cfa1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b1c2b4e6ffd307720ab6ce42f6749b0c02ba0a73"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: btrfs: directly free partially initialized fs_info in btrfs_check_leaked_roots()", "id": "2418823", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2418823"}, "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:\nbtrfs: directly free partially initialized fs_info in btrfs_check_leaked_roots()\nIf fs_info->super_copy or fs_info->super_for_commit allocated failed in\nbtrfs_get_tree_subvol(), then no need to call btrfs_free_fs_info().\nOtherwise btrfs_check_leaked_roots() would access NULL pointer because\nfs_info->allocated_roots had not been initialised.\nsyzkaller reported the following information:\n------------[ cut here ]------------\nBUG: unable to handle page fault for address: fffffffffffffbb0\n#PF: supervisor read access in kernel mode\n#PF: error_code(0x0000) - not-present page\nPGD 64c9067 P4D 64c9067 PUD 64cb067 PMD 0\nOops: Oops: 0000 [#1] SMP KASAN PTI\nCPU: 0 UID: 0 PID: 1402 Comm: syz.1.35 Not tainted 6.15.8 #4 PREEMPT(lazy)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), (...)\nRIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]\nRIP: 0010:raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]\nRIP: 0010:atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline]\nRIP: 0010:refcount_read include/linux/refcount.h:170 [inline]\nRIP: 0010:btrfs_check_leaked_roots+0x18f/0x2c0 fs/btrfs/disk-io.c:1230\n[...]\nCall Trace:\n<TASK>\nbtrfs_free_fs_info+0x310/0x410 fs/btrfs/disk-io.c:1280\nbtrfs_get_tree_subvol+0x592/0x6b0 fs/btrfs/super.c:2029\nbtrfs_get_tree+0x63/0x80 fs/btrfs/super.c:2097\nvfs_get_tree+0x98/0x320 fs/super.c:1759\ndo_new_mount+0x357/0x660 fs/namespace.c:3899\npath_mount+0x716/0x19c0 fs/namespace.c:4226\ndo_mount fs/namespace.c:4239 [inline]\n__do_sys_mount fs/namespace.c:4450 [inline]\n__se_sys_mount fs/namespace.c:4427 [inline]\n__x64_sys_mount+0x28c/0x310 fs/namespace.c:4427\ndo_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\ndo_syscall_64+0x92/0x180 arch/x86/entry/syscall_64.c:94\nentry_SYSCALL_64_after_hwframe+0x76/0x7e\nRIP: 0033:0x7f032eaffa8d\n[...]"], "name": "CVE-2025-40235", "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": "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": "2025-12-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-40235\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-40235\nhttps://lore.kernel.org/linux-cve-announce/2025120401-CVE-2025-40235-4e24@gregkh/T"], "threat_severity": "Low"}