# bpf: Fix bounds check for skb-backed dynptrs

CVE record · `CVE-2026-98591`

- **Identifiers:** `CVE-2026-98591`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 18 Oct 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 18 Oct 2026, 15:19 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: `6f5a630d7c57cd79b1f526a95e757311e32d41e5 to before 1b923538598be768e9f2f258a77a083d00e0c78b` (git)
  - affected: `6f5a630d7c57cd79b1f526a95e757311e32d41e5 to before 37877a24758068742fef687a7cf5362360dde1d1` (git)
  - affected: `6f5a630d7c57cd79b1f526a95e757311e32d41e5 to before 1196903a27cac5c929c7517e987a8d159f20c5e5` (git)
  - affected: `6f5a630d7c57cd79b1f526a95e757311e32d41e5 to before 39ffceaddb10753eac12785dba6ac0673860b4ac` (git)
  - affected: `6f5a630d7c57cd79b1f526a95e757311e32d41e5 to before ed6eec97b534979dcf28b40c389cee57bd6561d4` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.6`
  - unaffected: `before 6.6` (semver)
  - unaffected: `6.6.158 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.112 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.55 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.9 to 7.2.*, inclusive` (semver)
  - unaffected: `7.3 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

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.0020, the 10th percentile, on 9 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 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98591](https://www.cve.org/CVERecord?id=CVE-2026-98591)
- [NVD: CVE-2026-98591](https://nvd.nist.gov/vuln/detail/CVE-2026-98591)

### References from the CNA

- <https://git.kernel.org/stable/c/1b923538598be768e9f2f258a77a083d00e0c78b>
- <https://git.kernel.org/stable/c/37877a24758068742fef687a7cf5362360dde1d1>
- <https://git.kernel.org/stable/c/1196903a27cac5c929c7517e987a8d159f20c5e5>
- <https://git.kernel.org/stable/c/39ffceaddb10753eac12785dba6ac0673860b4ac>
- <https://git.kernel.org/stable/c/ed6eec97b534979dcf28b40c389cee57bd6561d4>

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-2026-98591>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98591/>. Everything for agents: <https://agentprime.io/llms.txt>.