# bpf: backtracking shouldn't clear outer frame R1-R5 for callbacks

CVE record · `CVE-2026-98084`

- **Identifiers:** `CVE-2026-98084`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 25 Sept 2026
- **Updated:** 21 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 25 Sept 2026, 10:24 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: `b43550d7d58e7ae6618aaab18c1e912fa4d6e3dd to before 1ac58dab0a83d2c64e3b807a3a0b399f17a74110` (git)
  - affected: `ab5cfac139ab8576fb54630d4cca23c3e690ee90 to before cdc93c6370f792d0649df2a145ac0cdcd430e411` (git)
  - affected: `ab5cfac139ab8576fb54630d4cca23c3e690ee90 to before 3a39bc9707fbd1bef4df7318a9d02222741dda5b` (git)
  - affected: `ab5cfac139ab8576fb54630d4cca23c3e690ee90 to before f83890dfed9efc5e19df1dbc1ad707a142936923` (git)
  - affected: `ab5cfac139ab8576fb54630d4cca23c3e690ee90 to before e3e4f66cc4b72333d0886ae2673c360248987889` (git)
  - affected: `6.6.15 to before 6.6.160` (semver)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.7`
  - unaffected: `before 6.7` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.114 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.57 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.7 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:** 0.0017, the 6th percentile, on 11 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 25 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98084](https://www.cve.org/CVERecord?id=CVE-2026-98084)
- [NVD: CVE-2026-98084](https://nvd.nist.gov/vuln/detail/CVE-2026-98084)

### References from the CNA

- <https://git.kernel.org/stable/c/1ac58dab0a83d2c64e3b807a3a0b399f17a74110>
- <https://git.kernel.org/stable/c/cdc93c6370f792d0649df2a145ac0cdcd430e411>
- <https://git.kernel.org/stable/c/3a39bc9707fbd1bef4df7318a9d02222741dda5b>
- <https://git.kernel.org/stable/c/f83890dfed9efc5e19df1dbc1ad707a142936923>
- <https://git.kernel.org/stable/c/e3e4f66cc4b72333d0886ae2673c360248987889>

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-2026-98084>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98084/>. Everything for agents: <https://agentprime.io/llms.txt>.