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CVE-2025-21699— gfs2: Truncate address space when flipping GFS2_DIF_JDATA flag

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，该漏洞源于在翻转GFS2_DIF_JDATA标志时未截断地址空间。攻击者利用该漏洞可以导致系统崩溃。

CVSS 7.8 · High EPSS 0.24% · P15

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 2164f9b9186962ffb7c687e18ec6f5255525f09d< 8c41abc11aa8438c9ed2d973f97e66674c0355df affected
2164f9b9186962ffb7c687e18ec6f5255525f09d< 4e3ded34f3f3c9d7ed2aac7be8cf51153646574a affected
2164f9b9186962ffb7c687e18ec6f5255525f09d< 2a40a140e11fec699e128170ccaa98b6b82cb503 affected
2164f9b9186962ffb7c687e18ec6f5255525f09d< 4dd57d1f0e9844311c635a7fb39abce4f2ac5a61 affected
2164f9b9186962ffb7c687e18ec6f5255525f09d< 4516febe325342555bb09ca5b396fb816d655821 affected
2164f9b9186962ffb7c687e18ec6f5255525f09d< 5bb1fd0855bb0abc7d97e44758d6ffed7882d2d0 affected
2164f9b9186962ffb7c687e18ec6f5255525f09d< 7c9d9223802fbed4dee1ae301661bf346964c9d2 affected
5.10 affected
… +8 more rows
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I. Basic Information for CVE-2025-21699

Vulnerability Information
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Vulnerability Title
gfs2: Truncate address space when flipping GFS2_DIF_JDATA flag
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: gfs2: Truncate address space when flipping GFS2_DIF_JDATA flag Truncate an inode's address space when flipping the GFS2_DIF_JDATA flag: depending on that flag, the pages in the address space will either use buffer heads or iomap_folio_state structs, and we cannot mix the two.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/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，该漏洞源于在翻转GFS2_DIF_JDATA标志时未截断地址空间。攻击者利用该漏洞可以导致系统崩溃。
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 2164f9b9186962ffb7c687e18ec6f5255525f09d ~ 8c41abc11aa8438c9ed2d973f97e66674c0355df -
Linux Linux 5.10 -

II. Public POCs for CVE-2025-21699

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III. Intelligence Information for CVE-2025-21699

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Patches & Fixes for CVE-2025-21699 (8)

Same Patch Batch · Linux · 2025-02-12 · 7 CVEs total

CVE-2025-21697 7.8 HIGH drm/v3d: Ensure job pointer is set to NULL after job completion
CVE-2024-57952 7.1 HIGH Revert "libfs: fix infinite directory reads for offset dir"
CVE-2024-57951 hrtimers: Handle CPU state correctly on hotplug
CVE-2025-21694 fs/proc: fix softlockup in __read_vmcore (part 2)
CVE-2025-21695 platform/x86: dell-uart-backlight: fix serdev race
CVE-2025-21696 mm: clear uffd-wp PTE/PMD state on mremap()

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-21699

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