CVE-2026-89781— Linux NTFS3 驱动越界读取漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: fix out-of-bounds read in read_log_rec_buf() read_log_rec_buf() copies a log record into a caller buffer starting at u32 off = lsn_to_page_off(log, lsn) + log->record_header_len; log
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一、 漏洞 CVE-2026-89781 基础信息
漏洞信息
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Vulnerability Title
fs/ntfs3: fix out-of-bounds read in read_log_rec_buf()
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
fs/ntfs3: fix out-of-bounds read in read_log_rec_buf()
read_log_rec_buf() copies a log record into a caller buffer starting at
u32 off = lsn_to_page_off(log, lsn) + log->record_header_len;
log->record_header_len (and log->data_off, used for the following pages)
comes verbatim from the on-disk restart area and is only checked for
8-byte alignment in is_rst_area_valid(), so off can exceed
log->page_size. "tail = log->page_size - off" then underflows and
memcpy() reads past the page_size-sized buffer returned by
read_log_page(), spilling adjacent slab memory into the replay buffer.
This is reachable by mounting a crafted NTFS image:
BUG: KASAN: slab-out-of-bounds in read_log_rec_buf+0x216/0x580
Read of size 64 at addr ffff88800a877ff8 by task exploit/127
read_log_rec_buf fs/ntfs3/fslog.c:2299
log_replay fs/ntfs3/fslog.c:4216
ntfs_loadlog_and_replay fs/ntfs3/fsntfs.c:324
ntfs_fill_super fs/ntfs3/super.c:1392
get_tree_bdev_flags fs/super.c:1694
__x64_sys_mount fs/namespace.c:4360
The buggy address is located 4088 bytes to the right of
the 4096-byte region [ffff88800a876000, ffff88800a877000)
Reject an in-page offset outside the current page before the copy.
[almaz.alexandrovich@paragon-software.com: replaced the >= sign with >]
来源: CVE Program / CVE List V5
CVSS Information
N/A
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-89781 的公开POC
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CVE-2026-89781 其他参考 (7)
同批安全公告 · Linux · 2026-09-16 · 共 20 条
| CVE-2026-89783 | Linux内核 xfrm6 越界写入漏洞 | |
| CVE-2026-89774 | Linux内核蓝牙SCO连接准备函数缺陷 | |
| CVE-2026-89775 | KVM arm64 VNCR TLB大小计算漏洞 | |
| CVE-2026-89776 | vxlan: vnifilter 属性长度校验缺陷 | |
| CVE-2026-89778 | isofs 空 zisofs 块页面数组越界访问漏洞 | |
| CVE-2026-89777 | vfio/pci初始化失败时未清空msi_perm内存泄漏 | |
| CVE-2026-89779 | NTFS3文件系统efs size验证缺陷 | |
| CVE-2026-89780 | Qualcomm rmnet 去聚合帧 skb->dev 恢复漏洞 | |
| CVE-2026-89782 | NTFS3 fs/ntfs3 拒绝重启表增长漏洞 | |
| CVE-2026-89784 | SunRPC rpcb_register_inet4/6 返回值检查漏洞 | |
| CVE-2026-89793 | ublk 只读设备 mmap 权限清除漏洞 | |
| CVE-2026-89785 | Linux内核ntfs3驱动越界读取漏洞 | |
| CVE-2026-89787 | Ext4 文件系统 ext4_search_dir 缓冲区溢出漏洞 | |
| CVE-2026-89786 | Linux内核ext4文件系统越界读取漏洞 | |
| CVE-2026-89788 | Linux kernel ksmbd 释放后使用漏洞 | |
| CVE-2026-89790 | Linux内核ipv6模块除零漏洞 | |
| CVE-2026-89789 | Linux内核GTP驱动UAF漏洞 | |
| CVE-2026-89791 | Linux perf 工具竞态导致 UAF 漏洞 | |
| CVE-2026-89792 | Linux ksmbd 共享配置越界读取漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-89781
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