CVE-2023-53640
BaseFortify
Publication date: 2025-10-07
Last updated on: 2026-02-03
Assigner: kernel.org
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | 6.4 |
| linux | linux_kernel | From 5.15.160 (inc) to 5.16 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-416 | The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a use-after-free out-of-bounds error in the Linux kernel's ASoC lpass component. It occurs during a read operation in the regcache_flat_read function, causing an out-of-bounds memory access detected by KASAN (Kernel Address Sanitizer). The issue arises from improper error checking and invalid value handling, which has been fixed by adding proper validation to prevent the out-of-bounds read.
How can this vulnerability impact me? :
This vulnerability can lead to a kernel crash or undefined behavior due to out-of-bounds memory access, potentially causing system instability or denial of service. Since it involves a use-after-free error, it might also be exploitable to execute arbitrary code or escalate privileges, depending on the context and attacker capabilities.
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability can be detected by observing KASAN (Kernel Address Sanitizer) slab-out-of-bounds errors in the kernel logs, specifically errors like "KASAN: slab-out-of-bounds Read in regcache_flat_read". Running kernel fuzzing tools such as syzkaller may trigger this error. You can check for such errors by examining the kernel log with commands like `dmesg | grep KASAN` or `journalctl -k | grep KASAN`.
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation involves updating the Linux kernel to a version where this vulnerability is fixed. The fix involves error checking and validating values in the affected ASoC lpass component to prevent use-after-free and out-of-bounds access. Until an update is applied, monitoring for KASAN errors and avoiding running fuzzing tools like syzkaller on production systems can reduce exposure.