CVE-2026-53002 remediation guide

Linux Linux, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6

In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: remove sprintf usage Replace it with scnprintf, the buffer sizes are expected to be large enough to hold the result, no need for snprintf+overflow check. Increase buffer size in mangle_content_len() while at it. BUG: KASAN: stack-out-of-bounds in vsnprintf+0xea5/0x1270 Write of size 1 at addr [..] vsnprintf+0xea5/0x1270 sprintf+0xb1/0xe0 mangle_content_len+0x1ac/0x280 nf_nat_sdp_session+0x1cc/0x240 process_sdp+0x8f8/0xb80 process_invite_request+0x108/0x2b0 process_sip_msg+0x5da/0xf50 sip_help_tcp+0x45e...

Open CVE record

ProductLinux Linux, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6

Affected versions>= 9fafcd7b203229c3f3893a475741afc27e276306 < 2f793ba78470a99f40389b7dc60a81d9f5ad3956, >= 9fafcd7b203229c3f3893a475741afc27e276306 < 6bbf829b4c1b44c941c47dd0d710f1393258f3d5, >= 9fafcd7b203229c3f3893a475741afc27e276306 < ab64e61c9323fa6de21bd20da1ddb29a0fb65d34, >= 9fafcd7b203229c3f3893a475741afc27e276306 < 1c9fb8aeed06790d42cdcd00f6c3ce0b9e926c1e, >= 9fafcd7b203229c3f3893a475741afc27e276306 < a8e0a32a23d3f34862af3b4da792ecb3a891a9a3, >= 9fafcd7b203229c3f3893a475741afc27e276306 < 8e3be0d12615a173fe260cd42753ca7a001acbf2, >= 9fafcd7b203229c3f3893a475741afc27e276306 < c08ff52e44945e6ef4ce0790f49ea761b060c45b, >= 9fafcd7b203229c3f3893a475741afc27e276306 < 6e7066bdb481a87fe88c4fa563e348c03b2d373d, >= 2.6.20, >= 2.6.20 < 5.10.258, >= 5.11 < 5.15.209, >= 5.16 < 6.1.175, >= 6.2 < 6.6.141, >= 6.7 < 6.12.91, >= 6.13 < 6.18.33, >= 6.19 < 7.0.10, 7.0, 8.0, 9.0, 10.0

Fixed versions5.10.258, 5.15.209, 6.1.175, 6.6.141, 6.12.91, 6.18.33, 7.0.10

Priority basisReview · CVSS 9.8 · EPSS 0.35%

Identify the affected asset

Confirm whether Linux Linux, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6 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: >= 9fafcd7b203229c3f3893a475741afc27e276306 < 2f793ba78470a99f40389b7dc60a81d9f5ad3956, >= 9fafcd7b203229c3f3893a475741afc27e276306 < 6bbf829b4c1b44c941c47dd0d710f1393258f3d5, >= 9fafcd7b203229c3f3893a475741afc27e276306 < ab64e61c9323fa6de21bd20da1ddb29a0fb65d34, >= 9fafcd7b203229c3f3893a475741afc27e276306 < 1c9fb8aeed06790d42cdcd00f6c3ce0b9e926c1e, >= 9fafcd7b203229c3f3893a475741afc27e276306 < a8e0a32a23d3f34862af3b4da792ecb3a891a9a3, >= 9fafcd7b203229c3f3893a475741afc27e276306 < 8e3be0d12615a173fe260cd42753ca7a001acbf2, >= 9fafcd7b203229c3f3893a475741afc27e276306 < c08ff52e44945e6ef4ce0790f49ea761b060c45b, >= 9fafcd7b203229c3f3893a475741afc27e276306 < 6e7066bdb481a87fe88c4fa563e348c03b2d373d, >= 2.6.20, >= 2.6.20 < 5.10.258, >= 5.11 < 5.15.209, >= 5.16 < 6.1.175, >= 6.2 < 6.6.141, >= 6.7 < 6.12.91, >= 6.13 < 6.18.33, >= 6.19 < 7.0.10, 7.0, 8.0, 9.0, 10.0. 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: 5.10.258, 5.15.209, 6.1.175, 6.6.141, 6.12.91, 6.18.33, 7.0.10. 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.