CVE-2026-43500 remediation guide

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

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Also unshare DATA/RESPONSE packets when paged frags are present The DATA-packet handler in rxrpc_input_call_event() and the RESPONSE handler in rxrpc_verify_response() copy the skb to a linear one before calling into the security ops only when skb_cloned() is true. An skb that is not cloned but still carries externally-owned paged fragments (e.g. SKBFL_SHARED_FRAG set by splice() into a UDP socket via __ip_append_data, or a chained skb_has_frag_list()) falls through to the in-place decryption path, which binds the fr...

Open CVE record

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

Affected versions>= d0d5c0cd1e711c98703f3544c1e6fc1372898de5 < 7c504ffab3efce8f7e4f463b314ae31030bdf18b, >= d0d5c0cd1e711c98703f3544c1e6fc1372898de5 < 3711382a77342a9a1c3d2e7330dcfc7ea927f568, >= d0d5c0cd1e711c98703f3544c1e6fc1372898de5 < 3eae0f4f9f7206a4801efa5e0235c25bbd5a412c, >= d0d5c0cd1e711c98703f3544c1e6fc1372898de5 < d45179f8795222ce858770dc619abe51f9d24411, >= d0d5c0cd1e711c98703f3544c1e6fc1372898de5 < aa54b1d27fe0c2b78e664a34fd0fdf7cd1960d71, >= 5.3, > 5.3 < 6.18.29, >= 6.19 < 7.0.6, 5.3, 7.1

Fixed versions6.18.29, 7.0.6

Priority basisPriority · CVSS 7.8 · EPSS 92.9%

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: >= d0d5c0cd1e711c98703f3544c1e6fc1372898de5 < 7c504ffab3efce8f7e4f463b314ae31030bdf18b, >= d0d5c0cd1e711c98703f3544c1e6fc1372898de5 < 3711382a77342a9a1c3d2e7330dcfc7ea927f568, >= d0d5c0cd1e711c98703f3544c1e6fc1372898de5 < 3eae0f4f9f7206a4801efa5e0235c25bbd5a412c, >= d0d5c0cd1e711c98703f3544c1e6fc1372898de5 < d45179f8795222ce858770dc619abe51f9d24411, >= d0d5c0cd1e711c98703f3544c1e6fc1372898de5 < aa54b1d27fe0c2b78e664a34fd0fdf7cd1960d71, >= 5.3, > 5.3 < 6.18.29, >= 6.19 < 7.0.6, 5.3, 7.1. Treat incomplete inventory results as unresolved.

Prioritize with independent signals

FIRST EPSS indicates an elevated probability of exploitation. 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: 6.18.29, 7.0.6. 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.