In the Linux kernel, the following vulnerability has been resolved:
ocfs2: handle invalid dinode in ocfs2_group_extend
[BUG]
kernel BUG at fs/ocfs2/resize.c:308!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
RIP: 0010:ocfs2_group_extend+0x10aa/0x1ae0 fs/ocfs2/resize.c:308
Code: 8b8520ff ffff83f8 860f8580 030000e8 5cc3c1fe
Call Trace:
...
ocfs2_ioctl+0x175/0x6e0 fs/ocfs2/ioctl.c:869
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl fs/ioctl.c:583 [inline]
__x64_sys_ioctl+0x197/0x1e0 fs/ioctl.c:583
x64_sys_call+0x1144/0x26a0 arch/x86/include/generated/asm/syscalls_64.h:17
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x93/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x76/0x7e
...
[CAUSE]
ocfs2_group_extend() assumes that the global bitmap inode block
returned from ocfs2_inode_lock() has already been validated and
BUG_ONs when the signature is not a dinode. That assumption is too
strong for crafted filesystems because the JBD2-managed buffer path
can bypass structural validation and return an invalid dinode to the
resize ioctl.
[FIX]
Validate the dinode explicitly in ocfs2_group_extend(). If the global
bitmap buffer does not contain a valid dinode, report filesystem
corruption with ocfs2_error() and fail the resize operation instead of
crashing the kernel.
References
Configurations
Configuration 1 (hide)
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History
01 Jun 2026, 17:16
| Type | Values Removed | Values Added |
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| References |
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29 Apr 2026, 14:18
| Type | Values Removed | Values Added |
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| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| First Time |
Linux
Linux linux Kernel |
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| CWE | NVD-CWE-noinfo | |
| References | () https://git.kernel.org/stable/c/10fb72c47aac446f12a4ccd962c7daa60cc890a1 - Patch | |
| References | () https://git.kernel.org/stable/c/41c6e9bc3a09539deab43957a3211d902a4818f0 - Patch | |
| References | () https://git.kernel.org/stable/c/4a1c0ddc6e7bcf2e9db0eeaab9340dcfe97f448f - Patch | |
| References | () https://git.kernel.org/stable/c/6575f9fbf084502b7118a628425bf7866666498d - Patch | |
| References | () https://git.kernel.org/stable/c/911b557dd7817460881fd51a03069b539c674d0e - Patch | |
| References | () https://git.kernel.org/stable/c/e384a850a3370d89a7a446cdeccd964bfba2a302 - Patch |
27 Apr 2026, 14:16
| Type | Values Removed | Values Added |
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| References |
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27 Apr 2026, 12:16
| Type | Values Removed | Values Added |
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| References |
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24 Apr 2026, 15:16
| Type | Values Removed | Values Added |
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| New CVE |
Information
Published : 2026-04-24 15:16
Updated : 2026-06-01 17:16
NVD link : CVE-2026-31596
Mitre link : CVE-2026-31596
CVE.ORG link : CVE-2026-31596
JSON object : View
Products Affected
linux
- linux_kernel
CWE