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CVE-2025-21988— fs/netfs/read_collect: add to next->prev_donated

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netfs/read_collect组件存在数据损坏问题。

CVSS 9.8 · Critical EPSS 0.39% · P32

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux ee4cdf7ba857a894ad1650d6ab77669cbbfa329e< 62b9ad7e52d4777f7e775ee1f0ad2452f6041024 affected
ee4cdf7ba857a894ad1650d6ab77669cbbfa329e< e25cec3b76aba47a49138d2162fc809c6cd49c9e affected
ee4cdf7ba857a894ad1650d6ab77669cbbfa329e< e2d46f2ec332533816417b60933954173f602121 affected
6.12 affected
< 6.12 unaffected
6.12.20≤ 6.12.* unaffected
6.13.8≤ 6.13.* unaffected
6.14≤ * unaffected
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I. Basic Information for CVE-2025-21988

Vulnerability Information
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Vulnerability Title
fs/netfs/read_collect: add to next->prev_donated
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fs/netfs/read_collect: add to next->prev_donated If multiple subrequests donate data to the same "next" request (depending on the subrequest completion order), each of them would overwrite the `prev_donated` field, causing data corruption and a BUG() crash ("Can't donate prior to front").
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/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netfs/read_collect组件存在数据损坏问题。
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 ee4cdf7ba857a894ad1650d6ab77669cbbfa329e ~ 62b9ad7e52d4777f7e775ee1f0ad2452f6041024 -
Linux Linux 6.12 -

II. Public POCs for CVE-2025-21988

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III. Intelligence Information for CVE-2025-21988

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Patches & Fixes for CVE-2025-21988 (2)

Same Patch Batch · Linux · 2025-04-02 · 8 CVEs total

CVE-2025-21994 7.6 HIGH ksmbd: fix incorrect validation for num_aces field of smb_acl
CVE-2025-21993 iscsi_ibft: Fix UBSAN shift-out-of-bounds warning in ibft_attr_show_nic()
CVE-2025-21992 HID: ignore non-functional sensor in HP 5MP Camera
CVE-2025-21991 x86/microcode/AMD: Fix out-of-bounds on systems with CPU-less NUMA nodes
CVE-2025-21990 drm/amdgpu: NULL-check BO's backing store when determining GFX12 PTE flags
CVE-2025-21989 drm/amd/display: fix missing .is_two_pixels_per_container
CVE-2025-21987 drm/amdgpu: init return value in amdgpu_ttm_clear_buffer

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux