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CVE-2025-38194— jffs2: check that raw node were preallocated before writing summary

EPSS 0.05% · P16
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I. Basic Information for CVE-2025-38194

Vulnerability Information
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Vulnerability Title
jffs2: check that raw node were preallocated before writing summary
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: jffs2: check that raw node were preallocated before writing summary Syzkaller detected a kernel bug in jffs2_link_node_ref, caused by fault injection in jffs2_prealloc_raw_node_refs. jffs2_sum_write_sumnode doesn't check return value of jffs2_prealloc_raw_node_refs and simply lets any error propagate into jffs2_sum_write_data, which eventually calls jffs2_link_node_ref in order to link the summary to an expectedly allocated node. kernel BUG at fs/jffs2/nodelist.c:592! invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 1 PID: 31277 Comm: syz-executor.7 Not tainted 6.1.128-syzkaller-00139-ge10f83ca10a1 #0 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:jffs2_link_node_ref+0x570/0x690 fs/jffs2/nodelist.c:592 Call Trace: <TASK> jffs2_sum_write_data fs/jffs2/summary.c:841 [inline] jffs2_sum_write_sumnode+0xd1a/0x1da0 fs/jffs2/summary.c:874 jffs2_do_reserve_space+0xa18/0xd60 fs/jffs2/nodemgmt.c:388 jffs2_reserve_space+0x55f/0xaa0 fs/jffs2/nodemgmt.c:197 jffs2_write_inode_range+0x246/0xb50 fs/jffs2/write.c:362 jffs2_write_end+0x726/0x15d0 fs/jffs2/file.c:301 generic_perform_write+0x314/0x5d0 mm/filemap.c:3856 __generic_file_write_iter+0x2ae/0x4d0 mm/filemap.c:3973 generic_file_write_iter+0xe3/0x350 mm/filemap.c:4005 call_write_iter include/linux/fs.h:2265 [inline] do_iter_readv_writev+0x20f/0x3c0 fs/read_write.c:735 do_iter_write+0x186/0x710 fs/read_write.c:861 vfs_iter_write+0x70/0xa0 fs/read_write.c:902 iter_file_splice_write+0x73b/0xc90 fs/splice.c:685 do_splice_from fs/splice.c:763 [inline] direct_splice_actor+0x10c/0x170 fs/splice.c:950 splice_direct_to_actor+0x337/0xa10 fs/splice.c:896 do_splice_direct+0x1a9/0x280 fs/splice.c:1002 do_sendfile+0xb13/0x12c0 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1323 [inline] __se_sys_sendfile64 fs/read_write.c:1309 [inline] __x64_sys_sendfile64+0x1cf/0x210 fs/read_write.c:1309 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x35/0x80 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 Fix this issue by checking return value of jffs2_prealloc_raw_node_refs before calling jffs2_sum_write_data. Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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，该漏洞源于未检查原始节点预分配导致空指针取消引用。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 2f785402f39b96a077b6e62bf26164bfb8e0c980 ~ 337f80f3d546e131c7aa90b61d8cde051ae858c7 -
LinuxLinux 2.6.18 -

II. Public POCs for CVE-2025-38194

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III. Intelligence Information for CVE-2025-38194

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Same Patch Batch · Linux · 2025-07-04 · 59 CVEs total

CVE-2025-38216iommu/vt-d: Restore context entry setup order for aliased devices
CVE-2025-38229media: cxusb: no longer judge rbuf when the write fails
CVE-2025-38231nfsd: Initialize ssc before laundromat_work to prevent NULL dereference
CVE-2025-38230jfs: validate AG parameters in dbMount() to prevent crashes
CVE-2025-38228media: imagination: fix a potential memory leak in e5010_probe()
CVE-2025-38233powerpc64/ftrace: fix clobbered r15 during livepatching
CVE-2025-38221ext4: fix out of bounds punch offset
CVE-2025-38219f2fs: prevent kernel warning due to negative i_nlink from corrupted image
CVE-2025-38218f2fs: fix to do sanity check on sit_bitmap_size
CVE-2025-38217hwmon: (ftsteutates) Fix TOCTOU race in fts_read()
CVE-2025-38220ext4: only dirty folios when data journaling regular files
CVE-2025-38215fbdev: Fix do_register_framebuffer to prevent null-ptr-deref in fb_videomode_to_var
CVE-2025-38214fbdev: Fix fb_set_var to prevent null-ptr-deref in fb_videomode_to_var
CVE-2025-38212ipc: fix to protect IPCS lookups using RCU
CVE-2025-38211RDMA/iwcm: Fix use-after-free of work objects after cm_id destruction
CVE-2025-38210configfs-tsm-report: Fix NULL dereference of tsm_ops
CVE-2025-38209nvme-tcp: remove tag set when second admin queue config fails
CVE-2025-38208smb: client: add NULL check in automount_fullpath
CVE-2025-38207mm: fix uprobe pte be overwritten when expanding vma
CVE-2025-38206exfat: fix double free in delayed_free

Showing top 20 of 59 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

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Same vendor: Linux

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