CVE-2025-40235
- Source
- https://cve.org/CVERecord?id=CVE-2025-40235
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-40235.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-40235
- Aliases
- Downstream
- Published
- 2025-12-04T15:31:25.785Z
- Modified
- 2026-02-09T18:29:22.462680Z
- Summary
- btrfs: directly free partially initialized fs_info in btrfs_check_leaked_roots()
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
btrfs: directly free partially initialized fsinfo in btrfscheckleakedroots()
If fsinfo->supercopy or fsinfo->superforcommit allocated failed in btrfsgettreesubvol(), then no need to call btrfsfreefsinfo(). Otherwise btrfscheckleakedroots() would access NULL pointer because fsinfo->allocatedroots had not been initialised.
syzkaller reported the following information: ------------[ cut here ]------------ BUG: unable to handle page fault for address: fffffffffffffbb0 #PF: supervisor read access in kernel mode #PF: errorcode(0x0000) - not-present page PGD 64c9067 P4D 64c9067 PUD 64cb067 PMD 0 Oops: Oops: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 1402 Comm: syz.1.35 Not tainted 6.15.8 #4 PREEMPT(lazy) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), (...) RIP: 0010:archatomicread arch/x86/include/asm/atomic.h:23 [inline] RIP: 0010:rawatomicread include/linux/atomic/atomic-arch-fallback.h:457 [inline] RIP: 0010:atomicread include/linux/atomic/atomic-instrumented.h:33 [inline] RIP: 0010:refcountread include/linux/refcount.h:170 [inline] RIP: 0010:btrfscheckleakedroots+0x18f/0x2c0 fs/btrfs/disk-io.c:1230 [...] Call Trace: <TASK> btrfsfreefsinfo+0x310/0x410 fs/btrfs/disk-io.c:1280 btrfsgettreesubvol+0x592/0x6b0 fs/btrfs/super.c:2029 btrfsgettree+0x63/0x80 fs/btrfs/super.c:2097 vfsgettree+0x98/0x320 fs/super.c:1759 donewmount+0x357/0x660 fs/namespace.c:3899 pathmount+0x716/0x19c0 fs/namespace.c:4226 domount fs/namespace.c:4239 [inline] _dosysmount fs/namespace.c:4450 [inline] _sesysmount fs/namespace.c:4427 [inline] _x64sysmount+0x28c/0x310 fs/namespace.c:4427 dosyscallx64 arch/x86/entry/syscall64.c:63 [inline] dosyscall64+0x92/0x180 arch/x86/entry/syscall64.c:94 entrySYSCALL64after_hwframe+0x76/0x7e RIP: 0033:0x7f032eaffa8d [...]
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40235.json" }- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/0c2b2d4d053e9840e6da6ed581befa20309f281a
- https://git.kernel.org/stable/c/17679ac6df6c4830ba711835aa8cf961be36cfa1
- https://git.kernel.org/stable/c/b1c2b4e6ffd307720ab6ce42f6749b0c02ba0a73
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40235.json
- https://nvd.nist.gov/vuln/detail/CVE-2025-40235
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced3bb17a25bcb09abbd667c6ac86c7c9109ae82bcdFixedb1c2b4e6ffd307720ab6ce42f6749b0c02ba0a73Fixed0c2b2d4d053e9840e6da6ed581befa20309f281aFixed17679ac6df6c4830ba711835aa8cf961be36cfa1