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CVE-2026-31716— fs/ntfs3: validate rec->used in journal-replay file record check

CVSS 7.8 · High EPSS 0.01% · P2
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I. Basic Information for CVE-2026-31716

Vulnerability Information
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Vulnerability Title
fs/ntfs3: validate rec->used in journal-replay file record check
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: validate rec->used in journal-replay file record check check_file_record() validates rec->total against the record size but never validates rec->used. The do_action() journal-replay handlers read rec->used from disk and use it to compute memmove lengths: DeleteAttribute: memmove(attr, ..., used - asize - roff) CreateAttribute: memmove(..., attr, used - roff) change_attr_size: memmove(..., used - PtrOffset(rec, next)) When rec->used is smaller than the offset of a validated attribute, or larger than the record size, these subtractions can underflow allowing us to copy huge amounts of memory in to a 4kb buffer, generally considered a bad idea overall. This requires a corrupted filesystem, which isn't a threat model the kernel really needs to worry about, but checking for such an obvious out-of-bounds value is good to keep things robust, especially on journal replay Fix this up by bounding rec->used correctly. This is much like commit b2bc7c44ed17 ("fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot") which checked different values in this same switch statement.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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ntfs3日志重放文件记录检查中未验证rec->used字段，可能导致内存复制越界。
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 b46acd6a6a627d876898e1c84d3f84902264b445 ~ f90b8a1798b750755a9e9aee66678f0a1820bbaf -
LinuxLinux 5.15 -

II. Public POCs for CVE-2026-31716

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III. Intelligence Information for CVE-2026-31716

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Same Patch Batch · Linux · 2026-05-01 · 146 CVEs total

CVE-2026-430379.8 CRITICALip6_tunnel: clear skb2->cb[] in ip4ip6_err()
CVE-2026-430119.8 CRITICALnet/x25: Fix potential double free of skb
CVE-2026-317059.8 CRITICALksmbd: fix out-of-bounds write in smb2_get_ea() EA alignment
CVE-2026-430389.8 CRITICALipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach()
CVE-2026-317189.8 CRITICALksmbd: fix use-after-free in __ksmbd_close_fd() via durable scavenger
CVE-2026-430399.8 CRITICALnet: ti: icssg-prueth: fix missing data copy and wrong recycle in ZC RX dispatch
CVE-2026-317738.8 HIGHBluetooth: SMP: derive legacy responder STK authentication from MITM state
CVE-2026-430188.8 HIGHBluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evt
CVE-2026-317068.8 HIGHksmbd: validate num_aces and harden ACE walk in smb_inherit_dacl()
CVE-2026-317098.8 HIGHsmb: client: validate the whole DACL before rewriting it in cifsacl
CVE-2026-430488.8 HIGHHID: core: Mitigate potential OOB by removing bogus memset()
CVE-2026-317178.8 HIGHksmbd: validate owner of durable handle on reconnect
CVE-2026-317398.8 HIGHcrypto: tegra - Add missing CRYPTO_ALG_ASYNC
CVE-2026-317358.8 HIGHiommupt: Fix short gather if the unmap goes into a large mapping
CVE-2026-317128.3 HIGHksmbd: require minimum ACE size in smb_check_perm_dacl()
CVE-2026-317718.1 HIGHBluetooth: hci_event: move wake reason storage into validated event handlers
CVE-2026-317798.1 HIGHwifi: iwlwifi: mvm: fix potential out-of-bounds read in iwl_mvm_nd_match_info_handler()
CVE-2026-317088.1 HIGHsmb: client: fix OOB read in smb2_ioctl_query_info QUERY_INFO path
CVE-2026-430518.1 HIGHHID: wacom: fix out-of-bounds read in wacom_intuos_bt_irq
CVE-2026-430567.8 HIGHnet: mana: fix use-after-free in add_adev() error path

Showing top 20 of 146 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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