# writeback: report a Tasks-RCU quiescent state per cgwb drain pass

CVE record · `CVE-2026-98536`

- **Identifiers:** `CVE-2026-98536`
- **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, 15:18 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: `c22d70a162d3cc177282c4487be4d54876ca55c8 to before 863049b4018237d1590cd13b16e9fe9c0faad2c6` (git)
  - affected: `c22d70a162d3cc177282c4487be4d54876ca55c8 to before 42462b5bb0dec57db7f85d0f77655c737d45754d` (git)
  - affected: `c22d70a162d3cc177282c4487be4d54876ca55c8 to before ebf1555ad2821be06f87a88ffd9a2cab8d2200e1` (git)
  - affected: `c22d70a162d3cc177282c4487be4d54876ca55c8 to before 4eb889649eaf65f4a5727b04ba1c017b7d05bb16` (git)
  - affected: `c22d70a162d3cc177282c4487be4d54876ca55c8 to before fd3bf32279df98751364b3609eb100a3e42f253b` (git)
  - affected: `c22d70a162d3cc177282c4487be4d54876ca55c8 to before 260f586a80e7f624dd7f069898a75a904f34d373` (git)
  - affected: `c22d70a162d3cc177282c4487be4d54876ca55c8 to before 407a5d205179a4ab186571b0e16ec42725dc77bc` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.14`
  - unaffected: `before 5.14` (semver)
  - unaffected: `5.15.222 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.189 to 6.1.*, inclusive` (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:** 0.0022, the 11th 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 18 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98536](https://www.cve.org/CVERecord?id=CVE-2026-98536)
- [NVD: CVE-2026-98536](https://nvd.nist.gov/vuln/detail/CVE-2026-98536)

### References from the CNA

- <https://git.kernel.org/stable/c/863049b4018237d1590cd13b16e9fe9c0faad2c6>
- <https://git.kernel.org/stable/c/42462b5bb0dec57db7f85d0f77655c737d45754d>
- <https://git.kernel.org/stable/c/ebf1555ad2821be06f87a88ffd9a2cab8d2200e1>
- <https://git.kernel.org/stable/c/4eb889649eaf65f4a5727b04ba1c017b7d05bb16>
- <https://git.kernel.org/stable/c/fd3bf32279df98751364b3609eb100a3e42f253b>
- <https://git.kernel.org/stable/c/260f586a80e7f624dd7f069898a75a904f34d373>
- <https://git.kernel.org/stable/c/407a5d205179a4ab186571b0e16ec42725dc77bc>

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-2026-98536>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98536/>. Everything for agents: <https://agentprime.io/llms.txt>.