# media: dvb-core: fix wrong reinitialization of ringbuffer on reopen

CVE record · `CVE-2026-23253`

- **Identifiers:** `CVE-2026-23253`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Weakness (CWE):** [CWE-665](https://cwe.mitre.org/data/definitions/665.html)
- **Tags:** [CWE-665](https://agentprime.io/advisories/tag/cwe-665.md)
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 18 Mar 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 18 Mar 2026, 17:01 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.

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `34731df288a5ffe4b0c396caf8cd24c6a710a222 to before 527cfa8a3486b3555c5c15e2f62be484a11398dc` (git)
  - affected: `34731df288a5ffe4b0c396caf8cd24c6a710a222 to before fb378cf89be434ed1f10ab79cc4788fba8ae868d` (git)
  - affected: `34731df288a5ffe4b0c396caf8cd24c6a710a222 to before f1e520ca2e83ece6731af6167c9e5e16931ecba0` (git)
  - affected: `34731df288a5ffe4b0c396caf8cd24c6a710a222 to before af050ab44fa1b1897a940d7d756e512232f5e5df` (git)
  - affected: `34731df288a5ffe4b0c396caf8cd24c6a710a222 to before d71781bad59b1c9d60d7068004581f9bf19c0c9d` (git)
  - affected: `34731df288a5ffe4b0c396caf8cd24c6a710a222 to before cfd94642025e6f71c8f754bdec0800ee95e4f3dd` (git)
  - affected: `34731df288a5ffe4b0c396caf8cd24c6a710a222 to before 32eb8e4adc207ef31bc6e5ae56bab940b0176066` (git)
  - affected: `34731df288a5ffe4b0c396caf8cd24c6a710a222 to before bfbc0b5b32a8f28ce284add619bf226716a59bc0` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `2.6.17`
  - unaffected: `before 2.6.17` (semver)
  - unaffected: `5.10.253 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.203 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.167 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.130 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.77 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.17 to 6.18.*, inclusive` (semver)
  - unaffected: `6.19.7 to 6.19.*, inclusive` (semver)
  - unaffected: `7.0 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)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0014, the 3rd percentile, on 5 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 18 Mar 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-23253](https://www.cve.org/CVERecord?id=CVE-2026-23253)
- [NVD: CVE-2026-23253](https://nvd.nist.gov/vuln/detail/CVE-2026-23253)

### References from the CNA

- <https://git.kernel.org/stable/c/527cfa8a3486b3555c5c15e2f62be484a11398dc>
- <https://git.kernel.org/stable/c/fb378cf89be434ed1f10ab79cc4788fba8ae868d>
- <https://git.kernel.org/stable/c/f1e520ca2e83ece6731af6167c9e5e16931ecba0>
- <https://git.kernel.org/stable/c/af050ab44fa1b1897a940d7d756e512232f5e5df>
- <https://git.kernel.org/stable/c/d71781bad59b1c9d60d7068004581f9bf19c0c9d>
- <https://git.kernel.org/stable/c/cfd94642025e6f71c8f754bdec0800ee95e4f3dd>
- <https://git.kernel.org/stable/c/32eb8e4adc207ef31bc6e5ae56bab940b0176066>
- <https://git.kernel.org/stable/c/bfbc0b5b32a8f28ce284add619bf226716a59bc0>

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-2026-23253>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-23253/>. Everything for agents: <https://agentprime.io/llms.txt>.