# rxrpc: Also unshare DATA/RESPONSE packets when paged frags are present

CVE record · `CVE-2026-43500`

- **Identifiers:** `CVE-2026-43500`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** Yes: CVSS 7+ and EPSS
- **CNA:** Linux
- **Weakness (CWE):** [CWE-123](https://cwe.mitre.org/data/definitions/123.html) · [CWE-787](https://cwe.mitre.org/data/definitions/787.html)
- **Tags:** [Memory corruption](https://agentprime.io/advisories/tag/memory-corruption.md) · [CWE-123](https://agentprime.io/advisories/tag/cwe-123.md)
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 11 May 2026
- **Updated:** 1 Sept 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 11 May 2026, 06:26 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Critical

Critical, because:

- CVSS score 7.8 (7.0 or more) and EPSS 0.94 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `d0d5c0cd1e711c98703f3544c1e6fc1372898de5 to before 7c504ffab3efce8f7e4f463b314ae31030bdf18b` (git)
  - affected: `d0d5c0cd1e711c98703f3544c1e6fc1372898de5 to before 3711382a77342a9a1c3d2e7330dcfc7ea927f568` (git)
  - affected: `d0d5c0cd1e711c98703f3544c1e6fc1372898de5 to before 3eae0f4f9f7206a4801efa5e0235c25bbd5a412c` (git)
  - affected: `d0d5c0cd1e711c98703f3544c1e6fc1372898de5 to before d45179f8795222ce858770dc619abe51f9d24411` (git)
  - affected: `d0d5c0cd1e711c98703f3544c1e6fc1372898de5 to before aa54b1d27fe0c2b78e664a34fd0fdf7cd1960d71` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.3`
  - unaffected: `before 5.3` (semver)
  - unaffected: `6.6.140 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.88 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.29 to 6.18.*, inclusive` (semver)
  - unaffected: `7.0.6 to 7.0.*, inclusive` (semver)
  - unaffected: `7.1 to *, inclusive` (original_commit_for_fix)
  - Other versions: affected

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 7.8 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`, from CNA (Linux) (used for this record)
- 7.8 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`, from ADP (CISA-ADP)
- 7.8 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`, from ADP (redhat-SADP)

- **CISA KEV:** Not listed.
- **EPSS:** 0.94, the 99th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 11 May 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-43500](https://www.cve.org/CVERecord?id=CVE-2026-43500)
- [NVD: CVE-2026-43500](https://nvd.nist.gov/vuln/detail/CVE-2026-43500)

### References from the CNA

- <https://git.kernel.org/stable/c/7c504ffab3efce8f7e4f463b314ae31030bdf18b>
- <https://git.kernel.org/stable/c/3711382a77342a9a1c3d2e7330dcfc7ea927f568>
- <https://git.kernel.org/stable/c/3eae0f4f9f7206a4801efa5e0235c25bbd5a412c>
- <https://git.kernel.org/stable/c/d45179f8795222ce858770dc619abe51f9d24411>
- <https://git.kernel.org/stable/c/aa54b1d27fe0c2b78e664a34fd0fdf7cd1960d71>

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-43500>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-43500/>. Everything for agents: <https://agentprime.io/llms.txt>.