CVE-2025-37738 remediation guide
Linux Linux, linux kernel, debian linux
In the Linux kernel, the following vulnerability has been resolved: ext4: ignore xattrs past end Once inside 'ext4_xattr_inode_dec_ref_all' we should ignore xattrs entries past the 'end' entry. This fixes the following KASAN reported issue: ================================================================== BUG: KASAN: slab-use-after-free in ext4_xattr_inode_dec_ref_all+0xb8c/0xe90 Read of size 4 at addr ffff888012c120c4 by task repro/2065 CPU: 1 UID: 0 PID: 2065 Comm: repro Not tainted 6.13.0-rc2+ #11 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebui...
Identify the affected asset
Confirm whether Linux Linux, linux kernel, debian linux is installed, record the deployed version and installation path, and identify exposed interfaces.
- Record the product name, package or appliance identifier, and installed version.
- Identify internet-facing, administrative, API, and internal access paths.
- Preserve the pre-change configuration and relevant service logs.
Validate the affected-version match
Compare the deployed version with the affected range: >= e50e5129f384ae282adebfb561189cdb19b81cee < 6aff941cb0f7d0c897c3698ad2e30672709135e3, >= e50e5129f384ae282adebfb561189cdb19b81cee < 76c365fa7e2a8bb85f0190cdb4b8cdc99b2fdce3, >= e50e5129f384ae282adebfb561189cdb19b81cee < f737418b6de31c962c7192777ee4018906975383, >= e50e5129f384ae282adebfb561189cdb19b81cee < cf9291a3449b04688b81e32621e88de8f4314b54, >= e50e5129f384ae282adebfb561189cdb19b81cee < 362a90cecd36e8a5c415966d0b75b04a0270e4dd, >= e50e5129f384ae282adebfb561189cdb19b81cee < eb59cc31b6ea076021d14b04e7faab1636b87d0e, >= e50e5129f384ae282adebfb561189cdb19b81cee < 3bc6317033f365ce578eb6039445fb66162722fd, >= e50e5129f384ae282adebfb561189cdb19b81cee < 836e625b03a666cf93ff5be328c8cb30336db872, >= e50e5129f384ae282adebfb561189cdb19b81cee < c8e008b60492cf6fd31ef127aea6d02fd3d314cd, >= 4.13, < 5.4.293, >= 5.5 < 5.10.237, >= 5.11 < 5.15.181, >= 5.16 < 6.1.135, >= 6.2 < 6.6.88, >= 6.7 < 6.12.24, >= 6.13 < 6.13.12, >= 6.14 < 6.14.3, 11.0. Treat incomplete inventory results as unresolved.
Prioritize with independent signals
The CVSS severity warrants an early asset and exposure review. Combine this signal with asset criticality, exposure, compensating controls, and business impact.
Apply supported remediation
Follow the vendor advisory or supported update path. Current fixed-version status: 5.4.293, 5.10.237, 5.15.181, 6.1.135, 6.6.88, 6.12.24, 6.13.12, 6.14.3. Preserve configuration and rollback material before change.
Verify the result
Confirm the resulting version, service health, authentication and access paths, monitoring coverage, and relevant security logs.
- Confirm the expected version and package state.
- Run a functional health check for critical service paths.
- Review authentication, error, application, and security monitoring logs.
- Reassess exposure if the supported fix cannot be applied.
Operational boundary
This page does not replace the vendor advisory, support contract, change-management process, or recovery plan. Do not infer that an asset is unaffected from an incomplete inventory query or a missing fixed-version field.