CyberSecBulletin
CVE-2023-52507NVD status: Analyzed

Linux: Out-of-bounds Read

Published Updated By the CyberSecBulletin desk

CVE-2023-52507 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 2c231a247a1d1628e41fa1eefd1a5307c41c5f53, a686f84101680b8442181a8846fbd3c934653729, 95733ea130e35ef9ec5949a5908dde3feaba92cb 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 0.24% 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 2c231a247a1d1628e41fa1eefd1a5307c41c5f53 or a686f84101680b8442181a8846fbd3c934653729 or 95733ea130e35ef9ec5949a5908dde3feaba92cb or a424807d860ba816aaafc3064b46b456361c0802, whichever matches your release line, or a later version.
  2. Update Linux Kernel to 4.14.328 or 4.19.297 or 5.4.259 or 5.10.199, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinux6a2968aaf50c7a22fced77a5e24aa636281efca8 up to, but not including, 2c231a247a1d1628e41fa1eefd1a5307c41c5f53; 6a2968aaf50c7a22fced77a5e24aa636281efca8 up to, but not including, a686f84101680b8442181a8846fbd3c934653729; 6a2968aaf50c7a22fced77a5e24aa636281efca8 up to, but not including, 95733ea130e35ef9ec5949a5908dde3feaba92cb; 6a2968aaf50c7a22fced77a5e24aa636281efca8 up to, but not including, a424807d860ba816aaafc3064b46b456361c0802; 6a2968aaf50c7a22fced77a5e24aa636281efca8 up to, but not including, 25dd54b95abfdca423b65a4ee620a774777d8213; 6a2968aaf50c7a22fced77a5e24aa636281efca8 up to, but not including, 853dda54ba59ea70d5580a298b7ede4707826848; 6a2968aaf50c7a22fced77a5e24aa636281efca8 up to, but not including, 6584eba7688dcf999542778b07f63828c21521da; 6a2968aaf50c7a22fced77a5e24aa636281efca8 up to, but not including, 354a6e707e29cb0c007176ee5b8db8be7bd2dee0; and 1 more ranges2c231a247a1d1628e41fa1eefd1a5307c41c5f53, a686f84101680b8442181a8846fbd3c934653729, 95733ea130e35ef9ec5949a5908dde3feaba92cb, a424807d860ba816aaafc3064b46b456361c0802, 25dd54b95abfdca423b65a4ee620a774777d8213, 853dda54ba59ea70d5580a298b7ede4707826848
LinuxLinux Kernel3.2 up to, but not including, 4.14.328; 4.15 up to, but not including, 4.19.297; 4.20 up to, but not including, 5.4.259; 5.5 up to, but not including, 5.10.199; 5.11 up to, but not including, 5.15.136; 5.16 up to, but not including, 6.1.59; 6.2 up to, but not including, 6.5.8; 6.64.14.328, 4.19.297, 5.4.259, 5.10.199, 5.15.136, 6.1.59

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.

Official description

In the Linux kernel, the following vulnerability has been resolved: nfc: nci: assert requested protocol is valid The protocol is used in a bit mask to determine if the protocol is supported. Assert the provided protocol is less than the maximum defined so it doesn't potentially perform a shift-out-of-bounds and provide a clearer error for undefined protocols vs unsupported ones.

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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