Bug 2390372 (CVE-2025-38653) - CVE-2025-38653 kernel: proc: use the same treatment to check proc_lseek as ones for proc_read_iter et.al
Summary: CVE-2025-38653 kernel: proc: use the same treatment to check proc_lseek as on...
Keywords:
Status: NEW
Alias: CVE-2025-38653
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-08-22 17:03 UTC by OSIDB Bzimport
Modified: 2025-08-25 10:39 UTC (History)
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Description OSIDB Bzimport 2025-08-22 17:03:21 UTC 
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.
Comment 1 Alexander B 2025-08-25 10:29:07 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025082238-CVE-2025-38653-35ba@gregkh/T
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