--- title: "CVE-2026-43500: rxrpc: Also unshare DATA/RESPONSE packets… | CubePath" description: "In the Linux kernel, the following vulnerability has been resolved: rxrpc: Also unshare DATA/RESPONSE packets when paged frags are present…" language: en source: https://cubepath.com/security/cve/CVE-2026-43500 --- # CVE-2026-43500: rxrpc: Also unshare DATA/RESPONSE packets… | CubePath ## Description 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 frag pages directly into the AEAD/skcipher SGL via skb\_to\_sgvec(). Extend the gate to also unshare when skb\_has\_frag\_list() or skb\_has\_shared\_frag() is true. This catches the splice-loopback vector and other externally-shared frag sources while preserving the zero-copy fast path for skbs whose frags are kernel-private (e.g. NIC page\_pool RX, GRO). The OOM/trace handling already in place is reused. Official description from the CVE record, published by Linux. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-43500) ## Key data ### CVSS 3.1 High 7.8 Score published by Linux in the CVE record. CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | Metric | Value | What it means | | ---------------------- | --------- | ----------------------------------------------------------------------------------------- | | Attack vector | Local | The attacker needs local access to the system, or to trick a user into running something. | | Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. | | Privileges required | Low | A basic user account is needed. | | User interaction | None | No action from any user is needed. | | Scope | Unchanged | The impact stays within the vulnerable component. | | Confidentiality impact | High | Serious or total effect on the secrecy of data. | | Integrity impact | High | Serious or total effect on the trustworthiness of data. | | Availability impact | High | Serious or total effect on availability. | ### CVSS 3.1 High 7.8 Score published by CISA-ADP in the CVE record. CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | Metric | Value | What it means | | ---------------------- | --------- | ----------------------------------------------------------------------------------------- | | Attack vector | Local | The attacker needs local access to the system, or to trick a user into running something. | | Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. | | Privileges required | Low | A basic user account is needed. | | User interaction | None | No action from any user is needed. | | Scope | Unchanged | The impact stays within the vulnerable component. | | Confidentiality impact | High | Serious or total effect on the secrecy of data. | | Integrity impact | High | Serious or total effect on the trustworthiness of data. | | Availability impact | High | Serious or total effect on availability. | ### CVSS 3.1 High 7.8 Score published by redhat-SADP in the CVE record. CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | Metric | Value | What it means | | ---------------------- | --------- | ----------------------------------------------------------------------------------------- | | Attack vector | Local | The attacker needs local access to the system, or to trick a user into running something. | | Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. | | Privileges required | Low | A basic user account is needed. | | User interaction | None | No action from any user is needed. | | Scope | Unchanged | The impact stays within the vulnerable component. | | Confidentiality impact | High | Serious or total effect on the secrecy of data. | | Integrity impact | High | Serious or total effect on the trustworthiness of data. | | Availability impact | High | Serious or total effect on availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.94118 (94.1% probability) Percentile 99.8% Scores of Nov 10, 2026 Model v2026.06.15 ### CISA assessment as of May 11, 2026 Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA. Automatable no Technical impact total ### Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-787](https://cwe.mitre.org/data/definitions/787.html) Out-of-bounds Write - [CWE-123](https://cwe.mitre.org/data/definitions/123.html) Write-what-where Condition ## Affected products Products listed in the CVE record, as the CNA published them. - Linux - affected: d0d5c0cd1e711c98703f3544c1e6fc1372898de5 up to before 7c504ffab3efce8f7e4f463b314ae31030bdf18b - affected: d0d5c0cd1e711c98703f3544c1e6fc1372898de5 up to before 3711382a77342a9a1c3d2e7330dcfc7ea927f568 - affected: d0d5c0cd1e711c98703f3544c1e6fc1372898de5 up to before 3eae0f4f9f7206a4801efa5e0235c25bbd5a412c - affected: d0d5c0cd1e711c98703f3544c1e6fc1372898de5 up to before d45179f8795222ce858770dc619abe51f9d24411 - affected: d0d5c0cd1e711c98703f3544c1e6fc1372898de5 up to before aa54b1d27fe0c2b78e664a34fd0fdf7cd1960d71 - Linux - affected: 5.3 - unaffected: before 5.3 - unaffected: 6.6.140 up to 6.6.\* - unaffected: 6.12.88 up to 6.12.\* - unaffected: 6.18.29 up to 6.18.\* - unaffected: 7.0.6 up to 7.0.\* - unaffected: 7.1 up to \* ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [git.kernel.org/stable/c/7c504ffab3efce8f7e4f463b314ae31030b…](https://git.kernel.org/stable/c/7c504ffab3efce8f7e4f463b314ae31030bdf18b) - [git.kernel.org/stable/c/3711382a77342a9a1c3d2e7330dcfc7ea92…](https://git.kernel.org/stable/c/3711382a77342a9a1c3d2e7330dcfc7ea927f568) - [git.kernel.org/stable/c/3eae0f4f9f7206a4801efa5e0235c25bbd5…](https://git.kernel.org/stable/c/3eae0f4f9f7206a4801efa5e0235c25bbd5a412c) - [git.kernel.org/stable/c/d45179f8795222ce858770dc619abe51f9d…](https://git.kernel.org/stable/c/d45179f8795222ce858770dc619abe51f9d24411) - [git.kernel.org/stable/c/aa54b1d27fe0c2b78e664a34fd0fdf7cd19…](https://git.kernel.org/stable/c/aa54b1d27fe0c2b78e664a34fd0fdf7cd1960d71) ## Timeline 1. ID reserved May 1, 2026 2. Record published May 11, 2026 3. Record last updated Sep 1, 2026 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:01 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)