CVE-2025-40190— ext4: guard against EA inode refcount underflow in xattr update
Affected Version Matrix 16
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< ea39e712c2f5ae148ee5515798ae03523673e002 | affected |
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 1cfb3e4ddbdc8e02e637b8852540bd4718bf4814 | affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 505e69f76ac497e788f4ea0267826ec7266b40c8 | affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 3d6269028246f4484bfed403c947a114bb583631 | affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 79ea7f3e11effe1bd9e753172981d9029133a278 | affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 6b879c4c6bbaab03c0ad2a983953bd1410bb165e | affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 440b003f449a4ff2a00b08c8eab9ba5cd28f3943 | affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 57295e835408d8d425bef58da5253465db3d6888 | affected | ||
| … +8 more rows | |||
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I. Basic Information for CVE-2025-40190
Vulnerability Information
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Vulnerability Title
ext4: guard against EA inode refcount underflow in xattr update
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ext4: guard against EA inode refcount underflow in xattr update syzkaller found a path where ext4_xattr_inode_update_ref() reads an EA inode refcount that is already <= 0 and then applies ref_change (often -1). That lets the refcount underflow and we proceed with a bogus value, triggering errors like: EXT4-fs error: EA inode <n> ref underflow: ref_count=-1 ref_change=-1 EXT4-fs warning: ea_inode dec ref err=-117 Make the invariant explicit: if the current refcount is non-positive, treat this as on-disk corruption, emit ext4_error_inode(), and fail the operation with -EFSCORRUPTED instead of updating the refcount. Delete the WARN_ONCE() as negative refcounts are now impossible; keep error reporting in ext4_error_inode(). This prevents the underflow and the follow-on orphan/cleanup churn.
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EA inode引用计数处理不当，可能导致数据损坏。
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
II. Public POCs for CVE-2025-40190
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|---|
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Patch · 4Other · 1
Same Patch Batch · Linux · 2025-11-12 · 96 CVEs total
| CVE-2025-40175 | idpf: cleanup remaining SKBs in PTP flows | |
| CVE-2025-40170 | net: use dst_dev_rcu() in sk_setup_caps() | |
| CVE-2025-40171 | nvmet-fc: move lsop put work to nvmet_fc_ls_req_op | |
| CVE-2025-40167 | ext4: detect invalid INLINE_DATA + EXTENTS flag combination | |
| CVE-2025-40164 | usbnet: Fix using smp_processor_id() in preemptible code warnings | |
| CVE-2025-40162 | ASoC: amd/sdw_utils: avoid NULL deref when devm_kasprintf() fails | |
| CVE-2025-40163 | sched/deadline: Stop dl_server before CPU goes offline | |
| CVE-2025-40161 | mailbox: zynqmp-ipi: Fix SGI cleanup on unbind | |
| CVE-2025-40166 | drm/xe/guc: Check GuC running state before deregistering exec queue | |
| CVE-2025-40174 | x86/mm: Fix SMP ordering in switch_mm_irqs_off() | |
| CVE-2025-40172 | accel/qaic: Treat remaining == 0 as error in find_and_map_user_pages() | |
| CVE-2025-40176 | tls: wait for pending async decryptions if tls_strp_msg_hold fails | |
| CVE-2025-40173 | net/ip6_tunnel: Prevent perpetual tunnel growth | |
| CVE-2025-40177 | accel/qaic: Fix bootlog initialization ordering | |
| CVE-2025-40178 | pid: Add a judgment for ns null in pid_nr_ns | |
| CVE-2025-40179 | ext4: verify orphan file size is not too big | |
| CVE-2025-40180 | mailbox: zynqmp-ipi: Fix out-of-bounds access in mailbox cleanup loop | |
| CVE-2025-40181 | x86/kvm: Force legacy PCI hole to UC when overriding MTRRs for TDX/SNP | |
| CVE-2025-40183 | bpf: Fix metadata_dst leak __bpf_redirect_neigh_v{4,6} | |
| CVE-2025-40182 | crypto: skcipher - Fix reqsize handling |
Showing top 20 of 96 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-46333
ptrace: slightly saner 'get_dumpable()' logic - CVE-2026-43490
ksmbd: validate inherited ACE SID length - CVE-2026-43489
liveupdate: luo_file: remember retrieve() status - CVE-2026-43487
ata: libata-core: Disable LPM on ST1000DM010-2EP102 - CVE-2026-43488
usb: xhci: Prevent interrupt storm on host controller error
Same vendor: Linux
- CVE-2026-46333
ptrace: slightly saner 'get_dumpable()' logic - CVE-2026-43490
ksmbd: validate inherited ACE SID length - CVE-2026-43489
liveupdate: luo_file: remember retrieve() status - CVE-2026-43487
ata: libata-core: Disable LPM on ST1000DM010-2EP102 - CVE-2026-43488
usb: xhci: Prevent interrupt storm on host controller error
V. Comments for CVE-2025-40190
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