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CVE-2023-52926

io_uring/rw: split io_read() into a helper

HIGH
7.8
CVSS Score
Published: February 24, 2025 at 09:01 AM UTC
Updated: August 5, 2026 at 10:24 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: IORING_OP_READ did not correctly consume the provided buffer list when read i/o returned < 0 (except for -EAGAIN and -EIOCBQUEUED return). This can lead to a potential use-after-free when the completion via io_rw_done runs at separate context.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
5.1 ≤ v < 6.1.1225.1 ≤ v < 6.6.685.1 ≤ v < 6.76.2 ≤ v < 6.6.682b188cc1bb857a9d4701ae59aa7768b5124e262e5.1
Vendor states this is fixed in 6c27fc6a783c8a77c756dd5461b15e465020d075 (fixed)
Vendor states this is fixed in 72060434a14caea20925e492310d6e680e3f9007 (fixed)
Vendor states this is fixed in a08d195b586a217d76b42062f88f375a3eedda4d (fixed)
Vendor states this is fixed in 5.1 (unaffected)
Vendor states this is fixed in 6.1.122 (unaffected)
Vendor states this is fixed in 6.6.68 (unaffected)
Vendor states this is fixed in 6.7 (unaffected)

References (4)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/6c27fc6a783c8a77c756dd5461b15e465020d075
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/72060434a14caea20925e492310d6e680e3f9007
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/a08d195b586a217d76b42062f88f375a3eedda4d
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHLinux
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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