CyberSecBulletin
CVE-2025-38652NVD status: Modified

Linux: Out-of-bounds Read

Published Updated By the CyberSecBulletin desk

CVE-2025-38652 is a high-severity out-of-bounds read vulnerability in Linux, with a CVSS 3.1 base score of 7.1 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. The record lists versions dc0172c74bd9edaee7bea2ebb35f3dbd37a8ae80, 1cf1ff15f262e8baf12201b270b6a79f9d119b2d, 666b7cf6ac9aa074b8319a2b68cba7f2c30023f0 as the first without the flaw, so updating Linux to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.19% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Linux to dc0172c74bd9edaee7bea2ebb35f3dbd37a8ae80 or 1cf1ff15f262e8baf12201b270b6a79f9d119b2d or 666b7cf6ac9aa074b8319a2b68cba7f2c30023f0 or 3466721f06edff834f99d9f49f23eabc6b2cb78e, whichever matches your release line, or a later version.
  2. Update Linux Kernel to 5.4.297 or 5.10.241 or 5.15.190 or 6.1.148, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinux3c62be17d4f562f43fe1d03b48194399caa35aa5 up to, but not including, dc0172c74bd9edaee7bea2ebb35f3dbd37a8ae80; 3c62be17d4f562f43fe1d03b48194399caa35aa5 up to, but not including, 1cf1ff15f262e8baf12201b270b6a79f9d119b2d; 3c62be17d4f562f43fe1d03b48194399caa35aa5 up to, but not including, 666b7cf6ac9aa074b8319a2b68cba7f2c30023f0; 3c62be17d4f562f43fe1d03b48194399caa35aa5 up to, but not including, 3466721f06edff834f99d9f49f23eabc6b2cb78e; 3c62be17d4f562f43fe1d03b48194399caa35aa5 up to, but not including, 345fc8d1838f3f8be7c8ed08d86a13dedef67136; 3c62be17d4f562f43fe1d03b48194399caa35aa5 up to, but not including, 70849d33130a2cf1d6010069ed200669c8651fbd; 3c62be17d4f562f43fe1d03b48194399caa35aa5 up to, but not including, 755427093e4294ac111c3f9e40d53f681a0fbdaa; 3c62be17d4f562f43fe1d03b48194399caa35aa5 up to, but not including, 1b1efa5f0e878745e94a98022e8edc675a87d78e; and 2 more rangesdc0172c74bd9edaee7bea2ebb35f3dbd37a8ae80, 1cf1ff15f262e8baf12201b270b6a79f9d119b2d, 666b7cf6ac9aa074b8319a2b68cba7f2c30023f0, 3466721f06edff834f99d9f49f23eabc6b2cb78e, 345fc8d1838f3f8be7c8ed08d86a13dedef67136, 70849d33130a2cf1d6010069ed200669c8651fbd
LinuxLinux Kernel4.10 up to, but not including, 5.4.297; 5.5 up to, but not including, 5.10.241; 5.11 up to, but not including, 5.15.190; 5.16 up to, but not including, 6.1.148; 6.2 up to, but not including, 6.6.102; 6.7 up to, but not including, 6.12.42; 6.13 up to, but not including, 6.15.10; 6.16 up to, but not including, 6.16.15.4.297, 5.10.241, 5.15.190, 6.1.148, 6.6.102, 6.12.42
DebianDebian Linux11.0Not stated

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
LocalThe attacker needs local access or must trick a user into running something.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
LowA basic user account is enough.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
NoneNothing can be modified.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.17.3HighCNA
CVSS 3.17.1HighNVD

Official description

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid out-of-boundary access in devs.path - touch /mnt/f2fs/012345678901234567890123456789012345678901234567890123 - truncate -s $((1024*1024*1024)) \ /mnt/f2fs/012345678901234567890123456789012345678901234567890123 - touch /mnt/f2fs/file - truncate -s $((1024*1024*1024)) /mnt/f2fs/file - mkfs.f2fs /mnt/f2fs/012345678901234567890123456789012345678901234567890123 \ -c /mnt/f2fs/file - mount /mnt/f2fs/012345678901234567890123456789012345678901234567890123 \ /mnt/f2fs/loop [16937.192225] F2FS-fs (loop0): Mount Device [ 0]: /mnt/f2fs/012345678901234567890123456789012345678901234567890123\xff\x01, 511, 0 - 3ffff [16937.192268] F2FS-fs (loop0): Failed to find devices If device path length equals to MAX_PATH_LEN, sbi->devs.path[] may not end up w/ null character due to path array is fully filled, So accidently, fields locate after path[] may be treated as part of device path, result in parsing wrong device path. struct f2fs_dev_info { ... char path[MAX_PATH_LEN]; ... }; Let's add one byte space for sbi->devs.path[] to store null character of device path string.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

How developers prevent this class of flaw

  • Use a language that provides appropriate memory abstractions.

More Out-of-bounds Read vulnerabilities (CWE-125)

Timeline

  1. CVE record published.
  2. Record last changed materially (score, affected products, status or references).

References

Recent Out-of-bounds Read vulnerabilities

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