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CVE-2025-38337— jbd2: fix data-race and null-ptr-deref in jbd2_journal_dirty_metadata()

EPSS 0.10% · P28

Affected Version Matrix 18

VendorProductVersion RangeStatus
LinuxLinux6e06ae88edae77379bef7c0cb7d3c2dd88676867< 5c1a34ff5b0bfdfd2f9343aa9b08d25df618bac5affected
6e06ae88edae77379bef7c0cb7d3c2dd88676867< ec669e5bf409f16e464bfad75f0ba039a45de29aaffected
6e06ae88edae77379bef7c0cb7d3c2dd88676867< 43d5e3bb5f1dcd91e30238ea0b59a5f77063f84eaffected
6e06ae88edae77379bef7c0cb7d3c2dd88676867< 23361b479f2700c00960d3ae9cdc8ededa762d47affected
6e06ae88edae77379bef7c0cb7d3c2dd88676867< 2e7c64d7a92c031d016f11c8e8cb05131ab7b75aaffected
6e06ae88edae77379bef7c0cb7d3c2dd88676867< f78b38af3540b4875147b7b884ee11a27b3dbf4caffected
6e06ae88edae77379bef7c0cb7d3c2dd88676867< a377996d714afb8d4d5f4906336f78510039da29affected
6e06ae88edae77379bef7c0cb7d3c2dd88676867< af98b0157adf6504fade79b3e6cb260c4ff68e37affected
… +10 more rows
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I. Basic Information for CVE-2025-38337

Vulnerability Information
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Vulnerability Title
jbd2: fix data-race and null-ptr-deref in jbd2_journal_dirty_metadata()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: jbd2: fix data-race and null-ptr-deref in jbd2_journal_dirty_metadata() Since handle->h_transaction may be a NULL pointer, so we should change it to call is_handle_aborted(handle) first before dereferencing it. And the following data-race was reported in my fuzzer: ================================================================== BUG: KCSAN: data-race in jbd2_journal_dirty_metadata / jbd2_journal_dirty_metadata write to 0xffff888011024104 of 4 bytes by task 10881 on cpu 1: jbd2_journal_dirty_metadata+0x2a5/0x770 fs/jbd2/transaction.c:1556 __ext4_handle_dirty_metadata+0xe7/0x4b0 fs/ext4/ext4_jbd2.c:358 ext4_do_update_inode fs/ext4/inode.c:5220 [inline] ext4_mark_iloc_dirty+0x32c/0xd50 fs/ext4/inode.c:5869 __ext4_mark_inode_dirty+0xe1/0x450 fs/ext4/inode.c:6074 ext4_dirty_inode+0x98/0xc0 fs/ext4/inode.c:6103 .... read to 0xffff888011024104 of 4 bytes by task 10880 on cpu 0: jbd2_journal_dirty_metadata+0xf2/0x770 fs/jbd2/transaction.c:1512 __ext4_handle_dirty_metadata+0xe7/0x4b0 fs/ext4/ext4_jbd2.c:358 ext4_do_update_inode fs/ext4/inode.c:5220 [inline] ext4_mark_iloc_dirty+0x32c/0xd50 fs/ext4/inode.c:5869 __ext4_mark_inode_dirty+0xe1/0x450 fs/ext4/inode.c:6074 ext4_dirty_inode+0x98/0xc0 fs/ext4/inode.c:6103 .... value changed: 0x00000000 -> 0x00000001 ================================================================== This issue is caused by missing data-race annotation for jh->b_modified. Therefore, the missing annotation needs to be added.
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jbd2中数据竞争和空指针取消引用，可能导致崩溃。
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 6e06ae88edae77379bef7c0cb7d3c2dd88676867 ~ 5c1a34ff5b0bfdfd2f9343aa9b08d25df618bac5 -
LinuxLinux 4.3 -

II. Public POCs for CVE-2025-38337

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III. Intelligence Information for CVE-2025-38337

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Same Patch Batch · Linux · 2025-07-10 · 84 CVEs total

CVE-2025-38318perf: arm-ni: Fix missing platform_set_drvdata()
CVE-2025-38327fgraph: Do not enable function_graph tracer when setting funcgraph-args
CVE-2025-38314virtio-pci: Fix result size returned for the admin command completion
CVE-2025-38316wifi: mt76: mt7996: avoid NULL pointer dereference in mt7996_set_monitor()
CVE-2025-38312fbdev: core: fbcvt: avoid division by 0 in fb_cvt_hperiod()
CVE-2025-38310seg6: Fix validation of nexthop addresses
CVE-2025-38309drm/xe/vm: move xe_svm_init() earlier
CVE-2025-38308ASoC: Intel: avs: Fix possible null-ptr-deref when initing hw
CVE-2025-38306fs/fhandle.c: fix a race in call of has_locked_children()
CVE-2025-38311iavf: get rid of the crit lock
CVE-2025-38315Bluetooth: btintel: Check dsbr size from EFI variable
CVE-2025-38317wifi: ath12k: Fix buffer overflow in debugfs
CVE-2025-38319drm/amd/pp: Fix potential NULL pointer dereference in atomctrl_initialize_mc_reg_table
CVE-2025-38320arm64/ptrace: Fix stack-out-of-bounds read in regs_get_kernel_stack_nth()
CVE-2025-38321smb: Log an error when close_all_cached_dirs fails
CVE-2025-38322perf/x86/intel: Fix crash in icl_update_topdown_event()
CVE-2025-38323net: atm: add lec_mutex
CVE-2025-38324mpls: Use rcu_dereference_rtnl() in mpls_route_input_rcu().
CVE-2025-38325ksmbd: add free_transport ops in ksmbd connection
CVE-2025-38326aoe: clean device rq_list in aoedev_downdev()

Showing top 20 of 84 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38337

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