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جزئیات آسیب‌پذیری

CVE-2026-45984

Linux LinuxRed Hat Enterprise Linux 9

gfs2: Fix use-after-free in iomap inline data write path

CVSS 3.1
7.8بالا

شرح رسمی (انگلیسی)

In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix use-after-free in iomap inline data write path The inline data buffer head (dibh) is being released prematurely in gfs2_iomap_begin() via release_metapath() while iomap->inline_data still points to dibh->b_data. This causes a use-after-free when iomap_write_end_inline() later attempts to write to the inline data area. The bug sequence: 1. gfs2_iomap_begin() calls gfs2_meta_inode_buffer() to read inode metadata into dibh 2. Sets iomap->inline_data = dibh->b_data + sizeof(struct gfs2_dinode) 3. Calls release_metapath() which calls brelse(dibh), dropping refcount to 0 4. kswapd reclaims the page (~39ms later in the syzbot report) 5. iomap_write_end_inline() tries to memcpy() to iomap->inline_data 6. KASAN detects use-after-free write to freed memory Fix by storing dibh in iomap->private and incrementing its refcount with get_bh() in gfs2_iomap_begin(). The buffer is then properly released in gfs2_iomap_end() after the inline write completes, ensuring the page stays alive for the entire iomap operation. Note: A C reproducer is not available for this issue. The fix is based on analysis of the KASAN report and code review showing the buffer head is freed before use. [agruenba: Take buffer head reference in gfs2_iomap_begin() to avoid leaks in gfs2_iomap_get() and gfs2_iomap_alloc().]

امتیازهای CVSS

امتیازنسخهمنبعبردار
7.8بالا 3.1 CVEProject cvelistV5 (CNA) (Linux) CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8بالا 3.1 CVEProject cvelistV5 (CNA) (redhat-SADP) CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

محصولات آسیب‌پذیر

فروشندهمحصولنسخه‌هامنبع
Linux Linux 5.2 CVEProject cvelistV5 (CNA)
Linux Linux d0a22a4b03b8475b7aa3fa41243c26c291407844 ≤ v < 1cae1bafdf9caa9b462b19af06b1a06902e4e142 CVEProject cvelistV5 (CNA)
Linux Linux d0a22a4b03b8475b7aa3fa41243c26c291407844 ≤ v < 764c3c84b5683e608f43735c803a5f415046686c CVEProject cvelistV5 (CNA)
Linux Linux d0a22a4b03b8475b7aa3fa41243c26c291407844 ≤ v < d87268326b277af3665237ac76a73dd9fa8e21b4 CVEProject cvelistV5 (CNA)
Linux Linux d0a22a4b03b8475b7aa3fa41243c26c291407844 ≤ v < 87d4954b5c59735a99ea98cb208d47130f6dce7d CVEProject cvelistV5 (CNA)
Linux Linux d0a22a4b03b8475b7aa3fa41243c26c291407844 ≤ v < 6d76febba07c40bcf358f63216d36ea68cf1c215 CVEProject cvelistV5 (CNA)
Linux Linux d0a22a4b03b8475b7aa3fa41243c26c291407844 ≤ v < 815ddd27c0c7171a99fe802fdb19098ddef8b19d CVEProject cvelistV5 (CNA)
Linux Linux d0a22a4b03b8475b7aa3fa41243c26c291407844 ≤ v < faddeb848305e79db89ee0479bb0e33380656321 CVEProject cvelistV5 (CNA)
Linux Linux d0a22a4b03b8475b7aa3fa41243c26c291407844 ≤ v < 1403989d1b502f4a2c0d0b42ccf1c25748442eff CVEProject cvelistV5 (CNA)
Red Hat Red Hat Enterprise Linux 9 همه CVEProject cvelistV5 (CNA)

منابع و راهنماها

۲۹
هشدار CVEهای بعدی این محصولمحصول را دنبال کنید تا آسیب‌پذیری‌های تازه را در تلگرام بگیرید.

اطلاعات

تاریخ انتشار
۱۴۰۵/۰۳/۰۶
آخرین به‌روزرسانی
۱۴۰۵/۰۷/۲۷
وضعیت
منتشرشده
صادرکننده (CNA)
Linux

پیش‌بینی بهره‌برداری (EPSS)

۰٫۱۸٪
احتمال بهره‌برداری در ۳۰ روز
۸٪
صدک (نسبت به همه‌ی CVEها)

ارزیابی SSVC (CISA)

قابل خودکارسازی
خیر
وضعیت بهره‌برداری
ندارد
اثر فنی
کامل

ضعف‌ها (CWE)

  • CWE-826
    Premature Release of Resource During Expected Lifetime