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CVE-2025-40179— ext4: verify orphan file size is not too big

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，该漏洞源于未验证孤儿文件大小，可能导致内存耗尽。

AI Predicted 4.4 Difficulty: Moderate EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37< 95a21611b14ae0a401720645245a8db16f040995 affected
02f310fcf47fa9311d6ba2946a8d19e7d7d11f37< 566a1d6084563bd07433025aa23bcea4427de107 affected
02f310fcf47fa9311d6ba2946a8d19e7d7d11f37< 304fc34ff6fc8261138fd81f119e024ac3a129e9 affected
02f310fcf47fa9311d6ba2946a8d19e7d7d11f37< a2d803fab8a6c6a874277cb80156dc114db91921 affected
02f310fcf47fa9311d6ba2946a8d19e7d7d11f37< 2b9da798ff0f4d026c5f0f815047393ebe7d8859 affected
02f310fcf47fa9311d6ba2946a8d19e7d7d11f37< 0a6ce20c156442a4ce2a404747bb0fb05d54eeb3 affected
5.15 affected
< 5.15 unaffected
… +6 more rows
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I. Basic Information for CVE-2025-40179

Vulnerability Information
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Vulnerability Title
ext4: verify orphan file size is not too big
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ext4: verify orphan file size is not too big In principle orphan file can be arbitrarily large. However orphan replay needs to traverse it all and we also pin all its buffers in memory. Thus filesystems with absurdly large orphan files can lead to big amounts of memory consumed. Limit orphan file size to a sane value and also use kvmalloc() for allocating array of block descriptor structures to avoid large order allocations for sane but large orphan files.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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，该漏洞源于未验证孤儿文件大小，可能导致内存耗尽。
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 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 ~ 95a21611b14ae0a401720645245a8db16f040995 -
Linux Linux 5.15 -

II. Public POCs for CVE-2025-40179

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III. Intelligence Information for CVE-2025-40179

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Patches & Fixes for CVE-2025-40179 (1)

Same Patch Batch · Linux · 2025-11-12 · 96 CVEs total

CVE-2025-40176 9.8 CRITICAL tls: wait for pending async decryptions if tls_strp_msg_hold fails
CVE-2025-40140 8.8 HIGH net: usb: Remove disruptive netif_wake_queue in rtl8150_set_multicast
CVE-2025-40133 8.1 HIGH mptcp: Use __sk_dst_get() and dst_dev_rcu() in mptcp_active_enable().
CVE-2025-40204 8.1 HIGH sctp: Fix MAC comparison to be constant-time
CVE-2025-40168 8.1 HIGH smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match().
CVE-2025-40158 8.1 HIGH ipv6: use RCU in ip6_output()
CVE-2025-40135 8.1 HIGH ipv6: use RCU in ip6_xmit()
CVE-2025-40186 8.1 HIGH tcp: Don't call reqsk_fastopen_remove() in tcp_conn_request().
CVE-2025-40141 8.0 HIGH Bluetooth: ISO: Fix possible UAF on iso_conn_free
CVE-2025-40167 7.8 HIGH ext4: detect invalid INLINE_DATA + EXTENTS flag combination
CVE-2025-40159 7.8 HIGH xsk: Harden userspace-supplied xdp_desc validation
CVE-2025-40166 7.8 HIGH drm/xe/guc: Check GuC running state before deregistering exec queue
CVE-2025-40165 7.8 HIGH media: nxp: imx8-isi: m2m: Fix streaming cleanup on release
CVE-2025-40151 7.8 HIGH LoongArch: BPF: No support of struct argument in trampoline programs
CVE-2025-40149 7.8 HIGH tls: Use __sk_dst_get() and dst_dev_rcu() in get_netdev_for_sock().
CVE-2025-40172 7.8 HIGH accel/qaic: Treat remaining == 0 as error in find_and_map_user_pages()
CVE-2025-40169 7.8 HIGH bpf: Reject negative offsets for ALU ops
CVE-2025-40201 7.8 HIGH kernel/sys.c: fix the racy usage of task_lock(tsk->group_leader) in sys_prlimit64() paths
CVE-2025-40203 7.8 HIGH listmount: don't call path_put() under namespace semaphore
CVE-2025-40205 7.8 HIGH btrfs: avoid potential out-of-bounds in btrfs_encode_fh()

Showing top 20 of 96 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-40179

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