CVE-2025-38653
HIGH severity · CVSS 7.8 · Use-after-free
7.8CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (2)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/1fccbfbae1dd36198dc47feac696563244ad81d3 ↗
Additional information
- NVD record
- https://git.kernel.org/stable/c/1fccbfbae1dd36198dc47feac696563244ad81d3Patch
- https://git.kernel.org/stable/c/33c778ea0bd0fa62ff590497e72562ff90f82b13Patch
- https://git.kernel.org/stable/c/c35b0feb80b48720dfbbf4e33759c7be3faaebb6Patch
- https://git.kernel.org/stable/c/d136502e04d8853a9aecb335d07bbefd7a1519a8Patch
- https://git.kernel.org/stable/c/fc1072d934f687e1221d685cf1a49a5068318f34Patch
- https://git.kernel.org/stable/c/ff7ec8dc1b646296f8d94c39339e8d3833d16c05Patch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlAdvisory