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Review reviewHigh

CVE-2025-38653

Linux Linux, linux kernel, debian linux

In the Linux kernel, the following vulnerability has been resolved: proc: use the same treatment to check proc_lseek as ones for proc_read_iter et.al Check pde->proc_ops->proc_lseek directly may cause UAF in rmmod scenario. It's a gap in proc_reg_open() after commit 654b33ada4ab("proc: fix UAF in proc_get_inode()"). Followed by AI Viro's suggestion, fix it in same manner.

CVSS
7.8
EPSS
0.17%
6.20% percentile
CISA KEV
Not listed
Published
2025.08.23
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.17%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: proc: use the same treatment to check proc_lseek as ones for proc_read_iter et.al Check pde->proc_ops->proc_lseek directly may cause UAF in rmmod scenario. It's a gap in proc_reg_open() after commit 654b33ada4ab("proc: fix UAF in proc_get_inode()"). Followed by AI Viro's suggestion, fix it in same manner.

Affected product and versions

Product
Linux Linux, linux kernel, debian linux
Affected versions
>= 3f61631d47f115b83c935d0039f95cb68b0c8ab7 < c35b0feb80b48720dfbbf4e33759c7be3faaebb6, >= 3f61631d47f115b83c935d0039f95cb68b0c8ab7 < 33c778ea0bd0fa62ff590497e72562ff90f82b13, >= 3f61631d47f115b83c935d0039f95cb68b0c8ab7 < fc1072d934f687e1221d685cf1a49a5068318f34, >= 3f61631d47f115b83c935d0039f95cb68b0c8ab7 < d136502e04d8853a9aecb335d07bbefd7a1519a8, >= 3f61631d47f115b83c935d0039f95cb68b0c8ab7 < 1fccbfbae1dd36198dc47feac696563244ad81d3, >= 3f61631d47f115b83c935d0039f95cb68b0c8ab7 < ff7ec8dc1b646296f8d94c39339e8d3833d16c05, >= 6.0, >= 6.0 < 6.1.148, >= 6.2 < 6.6.102, >= 6.7 < 6.12.42, >= 6.13 < 6.15.10, >= 6.16 < 6.16.1, 11.0
Fixed versions
6.1.148, 6.6.102, 6.12.42, 6.15.10, 6.16.1

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel, debian linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416