# tracing: Set the trace clock before registering the histogram trigger

CVE record · `CVE-2026-97935`

- **Identifiers:** `CVE-2026-97935`
- **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:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 25 Sept 2026, 10:22 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: `a4072fe85ba3671720cab0788291af953db27318 to before 85e6df6e9cd489de8e238596a68b89eee0c03b88` (git)
  - affected: `a4072fe85ba3671720cab0788291af953db27318 to before 3568dabef3fb56517777ab981584f72ab1e90186` (git)
  - affected: `a4072fe85ba3671720cab0788291af953db27318 to before c7b77c22adcf314ec8aa4807f01914dcbc62ed54` (git)
  - affected: `a4072fe85ba3671720cab0788291af953db27318 to before 578d39ab420b18b76a12fc8d0573ec041a84da28` (git)
  - affected: `a4072fe85ba3671720cab0788291af953db27318 to before cc6c4cf565b0c187c61ffd2e67a4dfb2427675ad` (git)
  - affected: `a4072fe85ba3671720cab0788291af953db27318 to before cfad128171f8e2237a3c723d6478ef2cfb3b9127` (git)
  - affected: `a4072fe85ba3671720cab0788291af953db27318 to before 65d1e28198f344832a8a63e8ccf84b8f65b92a32` (git)
  - affected: `a4072fe85ba3671720cab0788291af953db27318 to before 6ede78d0563a2a3ae3e46f9c07cedb5d79645429` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.17`
  - unaffected: `before 4.17` (semver)
  - unaffected: `5.10.273 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.224 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.112 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.53 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

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> The Linux kernel is affected from 4.17 until fixed in stable releases including 5.10.273, 5.15.224, 6.1.191 and 6.6.160. A user with write access to the tracing files can set up a named histogram trigger with an invalid clock, which leaves freed memory reachable and causes a use-after-free read. Upgrade to a fixed kernel for your branch.

Written 12 Nov 2026.

## 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:** 0.0018, the 7th percentile, on 12 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-2026-97935](https://www.cve.org/CVERecord?id=CVE-2026-97935)
- [NVD: CVE-2026-97935](https://nvd.nist.gov/vuln/detail/CVE-2026-97935)

### References from the CNA

- <https://git.kernel.org/stable/c/85e6df6e9cd489de8e238596a68b89eee0c03b88>
- <https://git.kernel.org/stable/c/3568dabef3fb56517777ab981584f72ab1e90186>
- <https://git.kernel.org/stable/c/c7b77c22adcf314ec8aa4807f01914dcbc62ed54>
- <https://git.kernel.org/stable/c/578d39ab420b18b76a12fc8d0573ec041a84da28>
- <https://git.kernel.org/stable/c/cc6c4cf565b0c187c61ffd2e67a4dfb2427675ad>
- <https://git.kernel.org/stable/c/cfad128171f8e2237a3c723d6478ef2cfb3b9127>
- <https://git.kernel.org/stable/c/65d1e28198f344832a8a63e8ccf84b8f65b92a32>
- <https://git.kernel.org/stable/c/6ede78d0563a2a3ae3e46f9c07cedb5d79645429>

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-2026-97935>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-97935/>. Everything for agents: <https://agentprime.io/llms.txt>.