# net: skbuff: don't touch shared zerocopy state in skb_tx_error()

CVE record · `CVE-2026-80977`

- **Identifiers:** `CVE-2026-80977`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 11 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 11 Sept 2026, 19:42 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: `25121173f7b1e4ac3fc692df6e7b8c52ec36abba to before 6493165034bca14033bf49c9cec7b45e97a91497` (git)
  - affected: `25121173f7b1e4ac3fc692df6e7b8c52ec36abba to before b4452349dcf4d561e13be768d5d278de58248930` (git)
  - affected: `25121173f7b1e4ac3fc692df6e7b8c52ec36abba to before 363c4252ffc473a0203e91b83ede5519dfb8bd07` (git)
  - affected: `25121173f7b1e4ac3fc692df6e7b8c52ec36abba to before 6ec22afc82a3cae07ade0a6ec361ae2532128ff5` (git)
  - affected: `25121173f7b1e4ac3fc692df6e7b8c52ec36abba to before 15aa81b390d401abf4b8211042470e9e92e3b7fb` (git)
  - affected: `25121173f7b1e4ac3fc692df6e7b8c52ec36abba to before 288f9970670841044ab030104fa6b6ed159949d0` (git)
  - affected: `25121173f7b1e4ac3fc692df6e7b8c52ec36abba to before 0370da114a9bc044e248b85c6809d1b5e0c1f7f9` (git)
  - affected: `25121173f7b1e4ac3fc692df6e7b8c52ec36abba to before f66bdb1cc0fcd227a062378f8be0b5873aa5600a` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `3.8`
  - unaffected: `before 3.8` (semver)
  - unaffected: `5.10.270 to 5.10.*, inclusive` (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: `6.12.109 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.50 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.4 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 14 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 11 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-80977](https://www.cve.org/CVERecord?id=CVE-2026-80977)
- [NVD: CVE-2026-80977](https://nvd.nist.gov/vuln/detail/CVE-2026-80977)

### References from the CNA

- <https://git.kernel.org/stable/c/6493165034bca14033bf49c9cec7b45e97a91497>
- <https://git.kernel.org/stable/c/b4452349dcf4d561e13be768d5d278de58248930>
- <https://git.kernel.org/stable/c/363c4252ffc473a0203e91b83ede5519dfb8bd07>
- <https://git.kernel.org/stable/c/6ec22afc82a3cae07ade0a6ec361ae2532128ff5>
- <https://git.kernel.org/stable/c/15aa81b390d401abf4b8211042470e9e92e3b7fb>
- <https://git.kernel.org/stable/c/288f9970670841044ab030104fa6b6ed159949d0>
- <https://git.kernel.org/stable/c/0370da114a9bc044e248b85c6809d1b5e0c1f7f9>
- <https://git.kernel.org/stable/c/f66bdb1cc0fcd227a062378f8be0b5873aa5600a>

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-2026-80977>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-80977/>. Everything for agents: <https://agentprime.io/llms.txt>.