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CVE-2025-39902— mm/slub: avoid accessing metadata when pointer is invalid in object_err()

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，该漏洞源于无效指针时访问元数据，可能导致崩溃。

CVSS 7.1 · High EPSS 0.17% · P6

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 81819f0fc8285a2a5a921c019e3e3d7b6169d225< 872f2c34ff232af1e65ad2df86d61163c8ffad42 affected
81819f0fc8285a2a5a921c019e3e3d7b6169d225< f66012909e7bf383fcdc5850709ed5716073fdc4 affected
81819f0fc8285a2a5a921c019e3e3d7b6169d225< 7e287256904ee796c9477e3ec92b07f236481ef3 affected
81819f0fc8285a2a5a921c019e3e3d7b6169d225< 1f0797f17927b5cad0fb7eced422f9a7c30a3191 affected
81819f0fc8285a2a5a921c019e3e3d7b6169d225< 0ef7058b4dc6fcef622ac23b45225db57f17b83f affected
81819f0fc8285a2a5a921c019e3e3d7b6169d225< dda6ec365ab04067adae40ef17015db447e90736 affected
81819f0fc8285a2a5a921c019e3e3d7b6169d225< 3baa1da473e6e50281324ff1d332d1a07a3bb02e affected
81819f0fc8285a2a5a921c019e3e3d7b6169d225< b4efccec8d06ceb10a7d34d7b1c449c569d53770 affected
… +10 more rows
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I. Basic Information for CVE-2025-39902

Vulnerability Information
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Vulnerability Title
mm/slub: avoid accessing metadata when pointer is invalid in object_err()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mm/slub: avoid accessing metadata when pointer is invalid in object_err() object_err() reports details of an object for further debugging, such as the freelist pointer, redzone, etc. However, if the pointer is invalid, attempting to access object metadata can lead to a crash since it does not point to a valid object. One known path to the crash is when alloc_consistency_checks() determines the pointer to the allocated object is invalid because of a freelist corruption, and calls object_err() to report it. The debug code should report and handle the corruption gracefully and not crash in the process. In case the pointer is NULL or check_valid_pointer() returns false for the pointer, only print the pointer value and skip accessing metadata.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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，该漏洞源于无效指针时访问元数据，可能导致崩溃。
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 81819f0fc8285a2a5a921c019e3e3d7b6169d225 ~ 872f2c34ff232af1e65ad2df86d61163c8ffad42 -
Linux Linux 2.6.22 -

II. Public POCs for CVE-2025-39902

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III. Intelligence Information for CVE-2025-39902

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Patches & Fixes for CVE-2025-39902 (1)

Same Patch Batch · Linux · 2025-10-01 · 169 CVEs total

CVE-2023-53517 9.8 CRITICAL tipc: do not update mtu if msg_max is too small in mtu negotiation
CVE-2023-53454 8.8 HIGH HID: multitouch: Correct devm device reference for hidinput input_dev name
CVE-2025-39918 8.8 HIGH wifi: mt76: fix linked list corruption
CVE-2025-39919 8.8 HIGH wifi: mt76: mt7996: add missing check for rx wcid entries
CVE-2022-50442 8.4 HIGH fs/ntfs3: Validate buffer length while parsing index
CVE-2023-53493 8.4 HIGH accel/qaic: tighten bounds checking in decode_message()
CVE-2022-50421 7.8 HIGH rpmsg: char: Avoid double destroy of default endpoint
CVE-2023-53484 7.8 HIGH lib: cpu_rmap: Avoid use after free on rmap->obj array entries
CVE-2022-50454 7.8 HIGH drm/nouveau: fix a use-after-free in nouveau_gem_prime_import_sg_table()
CVE-2022-50440 7.8 HIGH drm/vmwgfx: Validate the box size for the snooped cursor
CVE-2025-39924 7.8 HIGH erofs: fix invalid algorithm for encoded extents
CVE-2023-53510 7.8 HIGH scsi: ufs: core: Fix handling of lrbp->cmd
CVE-2023-53465 7.8 HIGH soundwire: qcom: fix storing port config out-of-bounds
CVE-2025-39927 7.8 HIGH ceph: fix race condition validating r_parent before applying state
CVE-2023-53506 7.8 HIGH udf: Do not bother merging very long extents
CVE-2022-50437 7.8 HIGH drm/msm/hdmi: fix memory corruption with too many bridges
CVE-2023-53495 7.8 HIGH net: ethernet: mvpp2_main: fix possible OOB write in mvpp2_ethtool_get_rxnfc()
CVE-2023-53494 7.8 HIGH crypto: xts - Handle EBUSY correctly
CVE-2022-50432 7.8 HIGH kernfs: fix use-after-free in __kernfs_remove
CVE-2023-53492 7.8 HIGH netfilter: nf_tables: do not ignore genmask when looking up chain by id

Showing top 20 of 169 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-39902

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