# scsi: st: Fix use-after-free race between st_remove() and st_open()

CVE record · `CVE-2026-99156`

- **Identifiers:** `CVE-2026-99156`
- **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: `6c648d95a6af4a79241a916871df17c84c68ea20 to before 7d7f9d2ee4b0841f3eba9fa3627044ad329428de` (git)
  - affected: `6c648d95a6af4a79241a916871df17c84c68ea20 to before d9517fc39ec3ee13eadefdc17f45300f7d23ed8c` (git)
  - affected: `6c648d95a6af4a79241a916871df17c84c68ea20 to before e7a5da4a4820210aa7d7cd8e6eb25aabe9e5b5a7` (git)
  - affected: `6c648d95a6af4a79241a916871df17c84c68ea20 to before 00ff1128123d4bdfacd28d68fb4b6e6f657a3648` (git)
  - affected: `6c648d95a6af4a79241a916871df17c84c68ea20 to before 5ef230f734e0d23db007c8405f38b7e226740084` (git)
  - affected: `6c648d95a6af4a79241a916871df17c84c68ea20 to before a1647b653549ff29f0422a63eabf329b842f3822` (git)
  - affected: `6c648d95a6af4a79241a916871df17c84c68ea20 to before 18a0e3733ce38718688e813e5e2d1106bd4830e5` (git)
  - affected: `6c648d95a6af4a79241a916871df17c84c68ea20 to before 71caf7f84bd62a4bf91cc95abd2de690afb8d15f` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `3.7`
  - unaffected: `before 3.7` (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-2026-99156)

## Sources

- [CVE List: CVE-2026-99156](https://www.cve.org/CVERecord?id=CVE-2026-99156)
- [NVD: CVE-2026-99156](https://nvd.nist.gov/vuln/detail/CVE-2026-99156)

### References from the CNA

- <https://git.kernel.org/stable/c/7d7f9d2ee4b0841f3eba9fa3627044ad329428de>
- <https://git.kernel.org/stable/c/d9517fc39ec3ee13eadefdc17f45300f7d23ed8c>
- <https://git.kernel.org/stable/c/e7a5da4a4820210aa7d7cd8e6eb25aabe9e5b5a7>
- <https://git.kernel.org/stable/c/00ff1128123d4bdfacd28d68fb4b6e6f657a3648>
- <https://git.kernel.org/stable/c/5ef230f734e0d23db007c8405f38b7e226740084>
- <https://git.kernel.org/stable/c/a1647b653549ff29f0422a63eabf329b842f3822>
- <https://git.kernel.org/stable/c/18a0e3733ce38718688e813e5e2d1106bd4830e5>
- <https://git.kernel.org/stable/c/71caf7f84bd62a4bf91cc95abd2de690afb8d15f>

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-2026-99156>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-99156/>. Everything for agents: <https://agentprime.io/llms.txt>.