# tracing/histograms: Reject non-stacktrace fields for synthetic stacktrace fields

CVE record · `CVE-2026-99163`

- **Identifiers:** `CVE-2026-99163`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 28 Oct 2026
- **Updated:** 31 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 28 Oct 2026, 10:35 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: `b9453380c1c542fd095a4dbe9251eeba4022bbce to before eba0a6365a0f38f7598a02fc7f9ee341c7efe7f5` (git)
  - affected: `5f52389bdd9eafb63b3a2f804e02aeb17b6a5f55 to before 326c45c9e201e3ff4c9e9e0e14c2c91364d6c8be` (git)
  - affected: `f3baa42afeea0d5f04ad31525e861199d02210cc to before 6c4e4946febb585d2fc93a02a0cd12cec715bb32` (git)
  - affected: `00cf3d672a9dd409418647e9f98784c339c3ff63 to before 7e0d05a6234a984ac23b8a563fb7f66f2572b668` (git)
  - affected: `00cf3d672a9dd409418647e9f98784c339c3ff63 to before 648687f2b448d8527cd7b112fe5d4bd0fec85a87` (git)
  - affected: `00cf3d672a9dd409418647e9f98784c339c3ff63 to before 1f36e4ddd05d540f363dbaa4c23042549f15b3ef` (git)
  - affected: `00cf3d672a9dd409418647e9f98784c339c3ff63 to before deb336ae7c7b341591a6862cf6fcfeca97c77dfd` (git)
  - affected: `00cf3d672a9dd409418647e9f98784c339c3ff63 to before a244c241593b5b38a08f0df2cb43c26574efbdcb` (git)
  - affected: `5.10.237 to before 5.10.273` (semver)
  - affected: `5.15.124 to before 5.15.224` (semver)
  - affected: `6.1.43 to before 6.1.191` (semver)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.3`
  - unaffected: `before 6.3` (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: `6.6.161 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.115 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.59 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.13 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

- 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:** 0.0013, the 2nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 28 Oct 2026, 10:35 UTC: [Confirmed by the CVE List](https://www.cve.org/CVERecord?id=CVE-2026-99163)

## Sources

- [CVE List: CVE-2026-99163](https://www.cve.org/CVERecord?id=CVE-2026-99163)
- [NVD: CVE-2026-99163](https://nvd.nist.gov/vuln/detail/CVE-2026-99163)

### References from the CNA

- <https://git.kernel.org/stable/c/eba0a6365a0f38f7598a02fc7f9ee341c7efe7f5>
- <https://git.kernel.org/stable/c/326c45c9e201e3ff4c9e9e0e14c2c91364d6c8be>
- <https://git.kernel.org/stable/c/6c4e4946febb585d2fc93a02a0cd12cec715bb32>
- <https://git.kernel.org/stable/c/7e0d05a6234a984ac23b8a563fb7f66f2572b668>
- <https://git.kernel.org/stable/c/648687f2b448d8527cd7b112fe5d4bd0fec85a87>
- <https://git.kernel.org/stable/c/1f36e4ddd05d540f363dbaa4c23042549f15b3ef>
- <https://git.kernel.org/stable/c/deb336ae7c7b341591a6862cf6fcfeca97c77dfd>
- <https://git.kernel.org/stable/c/a244c241593b5b38a08f0df2cb43c26574efbdcb>

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-2026-99163>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-99163/>. Everything for agents: <https://agentprime.io/llms.txt>.