CyberSecBulletin
CVE-2023-52525NVD status: Analyzed

Linux: Out-of-bounds Read

Published Updated By the CyberSecBulletin desk

CVE-2023-52525 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 71b1d2b57f145c8469aa9346f0fd57bf59b2b89c, 16cc18b9080892d1a0200a38e36ae52e464bc555, b8e260654a29de872e7cb85387d8ab8974694e8e 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 71b1d2b57f145c8469aa9346f0fd57bf59b2b89c or 16cc18b9080892d1a0200a38e36ae52e464bc555 or b8e260654a29de872e7cb85387d8ab8974694e8e or 10a18c8bac7f60d32b7af22da03b66f350beee38, whichever matches your release line, or a later version.
  2. Update Linux Kernel to 5.10.198 or 5.15.135 or 6.1.57 or 6.5.7, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinuxf517c97fc129995de77dd06aa5a74f909ebf568f up to, but not including, 71b1d2b57f145c8469aa9346f0fd57bf59b2b89c; 8824aa4ab62c800f75d96f48e1883a5f56ec5869 up to, but not including, 16cc18b9080892d1a0200a38e36ae52e464bc555; 29eca8b7863d1d7de6c5b746b374e3487d14f154 up to, but not including, b8e260654a29de872e7cb85387d8ab8974694e8e; 3fe3923d092e22d87d1ed03e2729db444b8c1331 up to, but not including, 10a18c8bac7f60d32b7af22da03b66f350beee38; 7c54b6fc39eb1aac51cf2945f8a25e2a47fdca02 up to, but not including, 5afb996349cb6d1f14d6ba9aaa7aed3bd82534f6; 3975e21d4d01efaf0296ded40d11c06589c49245 up to, but not including, 6b706286473db4fd54b5f869faa67f4a8cb18e99; 650d1bc02fba7b42f476d8b6643324abac5921ed up to, but not including, be2ff39b1504c5359f4a083c1cfcad21d666e216; 11958528161731c58e105b501ed60b83a91ea941 up to, but not including, aef7a0300047e7b4707ea0411dc9597cba108fc8; and 9 more ranges71b1d2b57f145c8469aa9346f0fd57bf59b2b89c, 16cc18b9080892d1a0200a38e36ae52e464bc555, b8e260654a29de872e7cb85387d8ab8974694e8e, 10a18c8bac7f60d32b7af22da03b66f350beee38, 5afb996349cb6d1f14d6ba9aaa7aed3bd82534f6, 6b706286473db4fd54b5f869faa67f4a8cb18e99
LinuxLinux Kernel5.10.195 up to, but not including, 5.10.198; 5.15.132 up to, but not including, 5.15.135; 6.1.53 up to, but not including, 6.1.57; 6.5.3 up to, but not including, 6.5.7; 4.14.326; 4.19.295; 5.4.2575.10.198, 5.15.135, 6.1.57, 6.5.7

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: wifi: mwifiex: Fix oob check condition in mwifiex_process_rx_packet Only skip the code path trying to access the rfc1042 headers when the buffer is too small, so the driver can still process packets without rfc1042 headers.

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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