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CVE-2025-68337— jbd2: avoid bug_on in jbd2_journal_get_create_access() when file system corrupted

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于jbd2在文件系统损坏时可能触发bug_on。

CVSS 7.5 · High EPSS 0.55% · P45

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 470decc613ab2048b619a01028072d932d9086ee< 71bbe06c40fc59b5b15661eca8ff307f4176d7f9 affected
470decc613ab2048b619a01028072d932d9086ee< ed62fd8c15d41c4127ad16b8219b63124f5962bc affected
470decc613ab2048b619a01028072d932d9086ee< 3faac6531d4818cd6be45e5bbf32937bbbc795c0 affected
470decc613ab2048b619a01028072d932d9086ee< b4f8eabf6d991bd41fabcdf9302c4b3eab590cf4 affected
470decc613ab2048b619a01028072d932d9086ee< a2a7f854d154a3e9232fec80782dad951655f52f affected
470decc613ab2048b619a01028072d932d9086ee< bf34c72337e40c4670cceeb79b353356933a254b affected
470decc613ab2048b619a01028072d932d9086ee< aa1703f3f706ea0867fb1991dcac709c9ec94cfb affected
470decc613ab2048b619a01028072d932d9086ee< 986835bf4d11032bba4ab8414d18fce038c61bb4 affected
… +10 more rows
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I. Basic Information for CVE-2025-68337

Vulnerability Information
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Vulnerability Title
jbd2: avoid bug_on in jbd2_journal_get_create_access() when file system corrupted
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: jbd2: avoid bug_on in jbd2_journal_get_create_access() when file system corrupted There's issue when file system corrupted: ------------[ cut here ]------------ kernel BUG at fs/jbd2/transaction.c:1289! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 5 UID: 0 PID: 2031 Comm: mkdir Not tainted 6.18.0-rc1-next RIP: 0010:jbd2_journal_get_create_access+0x3b6/0x4d0 RSP: 0018:ffff888117aafa30 EFLAGS: 00010202 RAX: 0000000000000000 RBX: ffff88811a86b000 RCX: ffffffff89a63534 RDX: 1ffff110200ec602 RSI: 0000000000000004 RDI: ffff888100763010 RBP: ffff888100763000 R08: 0000000000000001 R09: ffff888100763028 R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88812c432000 R14: ffff88812c608000 R15: ffff888120bfc000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f91d6970c99 CR3: 00000001159c4000 CR4: 00000000000006f0 Call Trace: <TASK> __ext4_journal_get_create_access+0x42/0x170 ext4_getblk+0x319/0x6f0 ext4_bread+0x11/0x100 ext4_append+0x1e6/0x4a0 ext4_init_new_dir+0x145/0x1d0 ext4_mkdir+0x326/0x920 vfs_mkdir+0x45c/0x740 do_mkdirat+0x234/0x2f0 __x64_sys_mkdir+0xd6/0x120 do_syscall_64+0x5f/0xfa0 entry_SYSCALL_64_after_hwframe+0x76/0x7e The above issue occurs with us in errors=continue mode when accompanied by storage failures. There have been many inconsistencies in the file system data. In the case of file system data inconsistency, for example, if the block bitmap of a referenced block is not set, it can lead to the situation where a block being committed is allocated and used again. As a result, the following condition will not be satisfied then trigger BUG_ON. Of course, it is entirely possible to construct a problematic image that can trigger this BUG_ON through specific operations. In fact, I have constructed such an image and easily reproduced this issue. Therefore, J_ASSERT() holds true only under ideal conditions, but it may not necessarily be satisfied in exceptional scenarios. Using J_ASSERT() directly in abnormal situations would cause the system to crash, which is clearly not what we want. So here we directly trigger a JBD abort instead of immediately invoking BUG_ON.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于jbd2在文件系统损坏时可能触发bug_on。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 470decc613ab2048b619a01028072d932d9086ee ~ 71bbe06c40fc59b5b15661eca8ff307f4176d7f9 -
Linux Linux 2.6.19 -

II. Public POCs for CVE-2025-68337

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III. Intelligence Information for CVE-2025-68337

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Same Patch Batch · Linux · 2025-12-22 · 12 CVEs total

CVE-2025-68336 7.5 HIGH locking/spinlock/debug: Fix data-race in do_raw_write_lock
CVE-2025-68335 comedi: pcl818: fix null-ptr-deref in pcl818_ai_cancel()
CVE-2025-68334 platform/x86/amd/pmc: Add support for Van Gogh SoC
CVE-2025-68333 sched_ext: Fix possible deadlock in the deferred_irq_workfn()
CVE-2025-68332 comedi: c6xdigio: Fix invalid PNP driver unregistration
CVE-2025-68331 usb: uas: fix urb unmapping issue when the uas device is remove during ongoing data transf
CVE-2025-68330 iio: accel: bmc150: Fix irq assumption regression
CVE-2025-68329 tracing: Fix WARN_ON in tracing_buffers_mmap_close for split VMAs
CVE-2025-68328 firmware: stratix10-svc: fix bug in saving controller data
CVE-2025-68327 usb: renesas_usbhs: Fix synchronous external abort on unbind
CVE-2025-68326 drm/xe/guc: Fix stack_depot usage

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-68337

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