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CVE-2026-89615— fs/ntfs3: bound page_lcns[] index by the log record

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基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于fs/ntfs3的copy_lcns循环和redo shorten循环在索引page_lcns[]时，未正确限制日志记录中的lcns_follow，导致特制记录可造成page_lcns[]越界写入，可能引发内存损坏。

CVSS 8.4 · High EPSS 0.15% · P4

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux b46acd6a6a627d876898e1c84d3f84902264b445< 31fdd11f75da9823500168cecb07aa45130915a3 affected
b46acd6a6a627d876898e1c84d3f84902264b445< bb742d1030864c0fe140666f639428ba4e90b2ca affected
b46acd6a6a627d876898e1c84d3f84902264b445< 61ca8cbbf68f77f25b699ed4358bd232f94ed43b affected
b46acd6a6a627d876898e1c84d3f84902264b445< f4c1bc6d7331f344ffcea93c2a37badcbe15baa6 affected
b46acd6a6a627d876898e1c84d3f84902264b445< 7ccb94901f38a062034b56b43c774050b113758f affected
b46acd6a6a627d876898e1c84d3f84902264b445< 1135ebc225996b3ac1a295652b19a0a706737a6c affected
b46acd6a6a627d876898e1c84d3f84902264b445< 6f7b9dbdc1b7520206abce0049bdd143eb536e75 affected
5.15 affected
… +8 more rows
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I. Basic Information for CVE-2026-89615

Vulnerability Information
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Vulnerability Title
fs/ntfs3: bound page_lcns[] index by the log record
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: bound page_lcns[] index by the log record The copy_lcns loop and the redo shorten loop index page_lcns[] at j + i, where i runs up to the log record's lcns_follow. That count is checked only against the record's own length, not the target entry, so check_dp_table() (which validates the entry's lcns_follow) does not cover it: the copy_lcns entry may even be freshly allocated after that check, and find_dp() bounds j but not i. A crafted record thus overflows page_lcns[] of an otherwise valid entry. Add dp_range_ok() and reject, before each loop, any record whose run does not fit the entry. These are the only two page_lcns[] accesses indexed by the record rather than the entry, so together with the entry validation every access is now bounded. [almaz.alexandrovich@paragon-software.com: original patch contained changes to the problem already handled, applied partly]
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于fs/ntfs3的copy_lcns循环和redo shorten循环在索引page_lcns[]时，未正确限制日志记录中的lcns_follow，导致特制记录可造成page_lcns[]越界写入，可能引发内存损坏。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux b46acd6a6a627d876898e1c84d3f84902264b445 ~ 31fdd11f75da9823500168cecb07aa45130915a3 -
Linux Linux 5.15 -

II. Public POCs for CVE-2026-89615

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III. Intelligence Information for CVE-2026-89615

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Patches & Fixes for CVE-2026-89615 (7)

Same Patch Batch · Linux · 2026-09-11 · 431 CVEs total

CVE-2026-89688 9.8 CRITICAL nfsd: drop the stateid, not the stateowner, on seqid_op replay retry
CVE-2026-89656 9.8 CRITICAL libceph: reject buckets with mismatched CRUSH ids
CVE-2026-89655 9.8 CRITICAL ceph: fix UAF in __kick_flushing_caps() on cf entry freed during unlock
CVE-2026-89658 9.8 CRITICAL NFSD: Prevent client use-after-free during NFSv4.0 revoked-state cleanup
CVE-2026-89660 9.8 CRITICAL NFSD: Prevent client use-after-free during admin state revocation
CVE-2026-89659 9.8 CRITICAL NFSD: Prevent client use-after-free during delegation revoke
CVE-2026-89662 9.8 CRITICAL NFSD: Prevent lock owner use-after-free during client teardown
CVE-2026-89669 9.8 CRITICAL nfsd: initialize copy-notify stateid before publishing it
CVE-2026-89674 9.8 CRITICAL nfsd: fix XDR length calculation in nfsd4_ff_encode_layoutget
CVE-2026-89675 9.8 CRITICAL nfsd: fix UAF in async copy cancel and shutdown
CVE-2026-89676 9.8 CRITICAL nfsd: fix stale s2s_cp_stateids IDR entry for async COPY
CVE-2026-89677 9.8 CRITICAL nfsd: fix possible fh_compose of wrong dentry in nfsd4_create_file()
CVE-2026-89681 9.8 CRITICAL nfsd: fix layout fence worker double-reference race
CVE-2026-89686 9.8 CRITICAL nfsd: fix BUG_ON in nfsd4_alloc_layout_stateid on racing delegation revoke
CVE-2026-89703 9.8 CRITICAL nfsd: set SC_STATUS_FREED in nfsd4_drop_revoked_stid for delegations
CVE-2026-89479 9.8 CRITICAL sctp: stop processing a packet once its association is deleted
CVE-2026-89478 9.8 CRITICAL sctp: drop a chunk if its transport was removed
CVE-2026-89702 9.8 CRITICAL nfsd: size fh_verify server sockaddr slot by xpt_locallen
CVE-2026-89482 9.8 CRITICAL nvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone
CVE-2026-89708 9.8 CRITICAL nfsd: RCU-protect cl_cb_session to fix use-after-free on session teardown

Showing top 20 of 431 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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