# coresight: etm4x: fix underflow for usage of (nrseqstate - 1)

CVE record · `CVE-2026-90274`

- **Identifiers:** `CVE-2026-90274`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:08 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: `2e1cdfe184b5202d51e0611d7a051e2bea303946 to before 8d669db59f7283b838e029af29da12e505265fae` (git)
  - affected: `2e1cdfe184b5202d51e0611d7a051e2bea303946 to before 4091f2d5b26d117c992ffcce1a5df425a0daedcd` (git)
  - affected: `2e1cdfe184b5202d51e0611d7a051e2bea303946 to before be7b2de5b9a96ae68ffa3528e0a40d63e0fd8148` (git)
  - affected: `2e1cdfe184b5202d51e0611d7a051e2bea303946 to before 4f9a0f548413bf864f609c9f4bc56e3f1b3577d4` (git)
  - affected: `2e1cdfe184b5202d51e0611d7a051e2bea303946 to before 1ade9a335c69fc735cb7b3f222ed35ab135540fb` (git)
  - affected: `2e1cdfe184b5202d51e0611d7a051e2bea303946 to before 5ac900f73ce1d4d8308f40752b51bc8a02b244d2` (git)
  - affected: `2e1cdfe184b5202d51e0611d7a051e2bea303946 to before 1674d9bff8073bdee5dbc200f56fc3caa28d0566` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.2`
  - unaffected: `before 4.2` (semver)
  - unaffected: `5.15.221 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.188 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.157 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.110 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.52 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.6 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 13 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 17 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-90274](https://www.cve.org/CVERecord?id=CVE-2026-90274)
- [NVD: CVE-2026-90274](https://nvd.nist.gov/vuln/detail/CVE-2026-90274)

### References from the CNA

- <https://git.kernel.org/stable/c/8d669db59f7283b838e029af29da12e505265fae>
- <https://git.kernel.org/stable/c/4091f2d5b26d117c992ffcce1a5df425a0daedcd>
- <https://git.kernel.org/stable/c/be7b2de5b9a96ae68ffa3528e0a40d63e0fd8148>
- <https://git.kernel.org/stable/c/4f9a0f548413bf864f609c9f4bc56e3f1b3577d4>
- <https://git.kernel.org/stable/c/1ade9a335c69fc735cb7b3f222ed35ab135540fb>
- <https://git.kernel.org/stable/c/5ac900f73ce1d4d8308f40752b51bc8a02b244d2>
- <https://git.kernel.org/stable/c/1674d9bff8073bdee5dbc200f56fc3caa28d0566>

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-2026-90274>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90274/>. Everything for agents: <https://agentprime.io/llms.txt>.