# CVE-2026-31435

> Vulnerability · severity: **HIGH** (CVSS 8.8).

## Description

In the Linux kernel, the following vulnerability has been resolved:

netfs: Fix read abandonment during retry

Under certain circumstances, all the remaining subrequests from a read
request will get abandoned during retry.  The abandonment process expects
the 'subreq' variable to be set to the place to start abandonment from, but
it doesn't always have a useful value (it will be uninitialised on the
first pass through the loop and it may point to a deleted subrequest on
later passes).

Fix the first jump to "abandon:" to set subreq to the start of the first
subrequest expected to need retry (which, in this abandonment case, turned
out unexpectedly to no longer have NEED_RETRY set).

Also clear the subreq pointer after discarding superfluous retryable
subrequests to cause an oops if we do try to access it.

## Key facts

- **CVE ID:** CVE-2026-31435
- **Published:** 2026-04-22
- **CVSS severity:** HIGH
- **CVSS base score:** 8.8

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-31435

## Citation

> AI Analytics. CVE-2026-31435. Retrieved 2026-07-19 from https://api.ai-analytics.org/cve/CVE-2026-31435. Derived from NIST NVD. Licensed CC0.

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