---
id: CVE-2026-72374
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  afs: Fix callback service message parsers to pass through -EAGAIN

  The AFS filesystem client uses an rxrpc server to listen for callback
  notifications
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  afs: Fix callback service message parsers to pass through -EAGAIN

  The AFS filesystem client uses an rxrpc server to listen for callback
  notifications.  Each callback c…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-393
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 9
published: '2026-08-15'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T19:17:25.753'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-72374'
references:
  - url: 'https://git.kernel.org/stable/c/09c67a7ded481482155b836c8c7f078a3075f8de'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/0acbc09d2aca0432af45cec114f20d55ceafaec4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/0f36469d7ce98b362934113c550d08bb0c784231'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/239cd337c9d047e7097f5b2ebbb41ddfb8180bc6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/26b737b3769e92493fe94c34620399d93ca231ae'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5a39b145a8fb49f316e7ec1f29ba51d68095c7e4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/772850871a2e772e26f9d93f1e9ddd413b3eeaa4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f14dd036fad3d359f26f1282199cec06b3a9362b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72374.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-72374'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2516650'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-72374'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-72374'
  - url: >-
      https://lore.kernel.org/linux-cve-announce/2026081516-CVE-2026-72374-ab30@gregkh/T
tags:
  - nvd
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.00716
epssPercentile: 0.53584
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-16T18:48:10.468561Z'
scores:
  nvd: 7.5
  vendor: 5.5
  cna: 7.5
ingestedAt: '2026-10-16T19:46:24.403Z'
---

## Overview

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

afs: Fix callback service message parsers to pass through -EAGAIN

The AFS filesystem client uses an rxrpc server to listen for callback
notifications.  Each callback call type handler has a delivery function
that parses the incoming request stream, and this should return -EAGAIN the
last packet hasn't yet been seen, but all currently queued received data is
consumed.  afs_extract_data() does this, but the -EAGAIN return is switched
to 0 inadvertantly

Fix callback service message parsers to pass through -EAGAIN

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72374.json)