CyberSecBulletin
CVE-2026-46230NVD status: Modified

Linux: Out-of-bounds Read

Published Updated By the CyberSecBulletin desk

CVE-2026-46230 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 f55552adb100eb54a6e6dabff4fbdc8679bd3fa0, 82c535eff05490c71153af57de9fe85502fcb5d5, 638d3e0b9eb77aa53fdd60e2b928761d16ba76fa 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 0.12% 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 f55552adb100eb54a6e6dabff4fbdc8679bd3fa0 or 82c535eff05490c71153af57de9fe85502fcb5d5 or 638d3e0b9eb77aa53fdd60e2b928761d16ba76fa or 870c8738c3774336baedddd0240951d078a703b8, whichever matches your release line, or a later version.
  2. Update Linux Kernel to 5.15.209 or 6.1.175 or 6.6.140 or 6.12.90, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinux87cc7f9ebf7ce10f82250002d667ef3e93a79d44 up to, but not including, f55552adb100eb54a6e6dabff4fbdc8679bd3fa0; 87cc7f9ebf7ce10f82250002d667ef3e93a79d44 up to, but not including, 82c535eff05490c71153af57de9fe85502fcb5d5; 87cc7f9ebf7ce10f82250002d667ef3e93a79d44 up to, but not including, 638d3e0b9eb77aa53fdd60e2b928761d16ba76fa; 87cc7f9ebf7ce10f82250002d667ef3e93a79d44 up to, but not including, 870c8738c3774336baedddd0240951d078a703b8; 87cc7f9ebf7ce10f82250002d667ef3e93a79d44 up to, but not including, 638e48ee39d0f2af9336f917a6f5d6692dd64d93; 87cc7f9ebf7ce10f82250002d667ef3e93a79d44 up to, but not including, e382e0b81a3e7bd21504fee1d01ae8b08f84d3a7; 87cc7f9ebf7ce10f82250002d667ef3e93a79d44 up to, but not including, b193019860d61e92da395eae2011f2f6716b182f; 5.13f55552adb100eb54a6e6dabff4fbdc8679bd3fa0, 82c535eff05490c71153af57de9fe85502fcb5d5, 638d3e0b9eb77aa53fdd60e2b928761d16ba76fa, 870c8738c3774336baedddd0240951d078a703b8, 638e48ee39d0f2af9336f917a6f5d6692dd64d93, e382e0b81a3e7bd21504fee1d01ae8b08f84d3a7
LinuxLinux Kernel5.13 up to, but not including, 5.15.209; 5.16 up to, but not including, 6.1.175; 6.2 up to, but not including, 6.6.140; 6.7 up to, but not including, 6.12.90; 6.13 up to, but not including, 6.18.32; 6.19 up to, but not including, 7.0.95.15.209, 6.1.175, 6.6.140, 6.12.90, 6.18.32, 7.0.9

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 CNA.

Official description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn3: Prevent OOB reads when parsing dec msg Check bounds against the end of the BO whenever we access the msg.

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. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Recent Out-of-bounds Read vulnerabilities

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