# zram: fix use-after-free in zram_bvec_write_partial()

CVE record · `CVE-2026-53185`

- **Identifiers:** `CVE-2026-53185`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Weakness (CWE):** [CWE-364](https://cwe.mitre.org/data/definitions/364.html)
- **Tags:** [CWE-364](https://agentprime.io/advisories/tag/cwe-364.md)
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 25 Jun 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 25 Jun 2026, 08:38 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: `8e654f8fbff52ac483fb69957222853d7e2fc588 to before 0c2821665ff71be3f4b07ecece384669f2877f6a` (git)
  - affected: `8e654f8fbff52ac483fb69957222853d7e2fc588 to before 77a602b505ce4802915853cfc435a4722fab3e64` (git)
  - affected: `8e654f8fbff52ac483fb69957222853d7e2fc588 to before c96786d6ff1acc1d54d9241e97767554c1dfdd5b` (git)
  - affected: `8e654f8fbff52ac483fb69957222853d7e2fc588 to before 198b5a14cca27263b9c14b20114c8092de15dfcb` (git)
  - affected: `8e654f8fbff52ac483fb69957222853d7e2fc588 to before 732fd9f0b9c1cdc6dfd77162ded60df005182cc0` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.14`
  - unaffected: `before 4.14` (semver)
  - unaffected: `6.6.143 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.94 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.36 to 6.18.*, inclusive` (semver)
  - unaffected: `7.0.13 to 7.0.*, inclusive` (semver)
  - unaffected: `7.1 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) (used for this record)
- 7.0 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H`, from ADP (redhat-SADP)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0011, the 1st percentile, on 5 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 Jun 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-53185](https://www.cve.org/CVERecord?id=CVE-2026-53185)
- [NVD: CVE-2026-53185](https://nvd.nist.gov/vuln/detail/CVE-2026-53185)

### References from the CNA

- <https://git.kernel.org/stable/c/0c2821665ff71be3f4b07ecece384669f2877f6a>
- <https://git.kernel.org/stable/c/77a602b505ce4802915853cfc435a4722fab3e64>
- <https://git.kernel.org/stable/c/c96786d6ff1acc1d54d9241e97767554c1dfdd5b>
- <https://git.kernel.org/stable/c/198b5a14cca27263b9c14b20114c8092de15dfcb>
- <https://git.kernel.org/stable/c/732fd9f0b9c1cdc6dfd77162ded60df005182cc0>

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-2026-53185>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-53185/>. Everything for agents: <https://agentprime.io/llms.txt>.