CVE-2024-56709

Published Dec 29, 2024

Last updated 6 months ago

CVSS medium 5.5

Overview

Description
In the Linux kernel, the following vulnerability has been resolved: io_uring: check if iowq is killed before queuing task work can be executed after the task has gone through io_uring termination, whether it's the final task_work run or the fallback path. In this case, task work will find ->io_wq being already killed and null'ed, which is a problem if it then tries to forward the request to io_queue_iowq(). Make io_queue_iowq() fail requests in this case. Note that it also checks PF_KTHREAD, because the user can first close a DEFER_TASKRUN ring and shortly after kill the task, in which case ->iowq check would race.
Source
416baaa9-dc9f-4396-8d5f-8c081fb06d67
NVD status
Modified
Products
linux_kernel

Risk scores

CVSS 3.1

Type
Primary
Base score
5.5
Impact score
3.6
Exploitability score
1.8
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Severity
MEDIUM

Weaknesses

nvd@nist.gov
NVD-CWE-noinfo

Social media

Hype score
Not currently trending

  1. [io_uring] (CVE-2024-53187) https://t.co/TQRZeftZjs (CVE-2024-56584) https://t.co/fzED56n4Rb (CVE-2024-56709) https://t.co/f95adls87s

    @xvonfers

    29 Dec 2024

    2883 Impressions

    5 Retweets

    27 Likes

    6 Bookmarks

    0 Replies

    0 Quotes

  2. CVE-2024-56709 Linux Kernel io_uring Vulnerability Resolved Task Work Exploit P... https://t.co/Ri5zV8RbZO Customizable Vulnerability Alerts: https://t.co/U7998fz7yk

    @VulmonFeeds

    29 Dec 2024

    63 Impressions

    1 Retweet

    1 Like

    1 Bookmark

    0 Replies

    0 Quotes

  3. CVE-2024-56709 In the Linux kernel, the following vulnerability has been resolved: io_uring: check if iowq is killed before queuing task work can be executed after the task has go… https://t.co/iUkusNBEVh

    @CVEnew

    29 Dec 2024

    389 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

Configurations

Related CVEs

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References

Sources include official advisories and independent security research.