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Priority reviewHigh

CVE-2026-43500

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...

CVSS
7.8
EPSS
92.9%
99.8% percentile
CISA KEV
Not listed
Published
2026.05.11
PRIORITY ASSESSMENT

Priority review

FIRST EPSS indicates an elevated probability of exploitation.

Known exploitationNot established by KEV
Exploit probability92.9%
Technical severityCVSS 7.8

Vulnerability overview

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...

Affected product and versions

Product
Linux 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 versions
6.18.29, 7.0.6

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6 and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-123, CWE-787