CyberSecBulletin
CVE-2024-26610NVD status: Modified

Linux: Out-of-bounds Write

Published Updated By the CyberSecBulletin desk

CVE-2024-26610 is a high-severity out-of-bounds write vulnerability in Linux, with a CVSS 3.1 base score of 7.8 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 05dd9facfb9a1e056752c0901c6e86416037d15a, 99a23462fe1a6f709f0fda3ebbe8b6b193ac75bd, aa2cc9363926991ba74411e3aa0a0ea82c1ffe32 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 0.31% 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 05dd9facfb9a1e056752c0901c6e86416037d15a or 99a23462fe1a6f709f0fda3ebbe8b6b193ac75bd or aa2cc9363926991ba74411e3aa0a0ea82c1ffe32 or 870171899d75d43e3d14360f3a4850e90a9c289b, whichever matches your release line, or a later version.
  2. Update Linux Kernel to 5.10.210 or 5.15.149 or 6.1.76 or 6.6.15, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinuxcf29c5b66b9f83939367d90679eb68cdfa2f0356 up to, but not including, 05dd9facfb9a1e056752c0901c6e86416037d15a; cf29c5b66b9f83939367d90679eb68cdfa2f0356 up to, but not including, 99a23462fe1a6f709f0fda3ebbe8b6b193ac75bd; cf29c5b66b9f83939367d90679eb68cdfa2f0356 up to, but not including, aa2cc9363926991ba74411e3aa0a0ea82c1ffe32; cf29c5b66b9f83939367d90679eb68cdfa2f0356 up to, but not including, 870171899d75d43e3d14360f3a4850e90a9c289b; cf29c5b66b9f83939367d90679eb68cdfa2f0356 up to, but not including, f32a81999d0b8e5ce60afb5f6a3dd7241c17dd67; cf29c5b66b9f83939367d90679eb68cdfa2f0356 up to, but not including, cf4a0d840ecc72fcf16198d5e9c505ab7d5a5e4d; 5.505dd9facfb9a1e056752c0901c6e86416037d15a, 99a23462fe1a6f709f0fda3ebbe8b6b193ac75bd, aa2cc9363926991ba74411e3aa0a0ea82c1ffe32, 870171899d75d43e3d14360f3a4850e90a9c289b, f32a81999d0b8e5ce60afb5f6a3dd7241c17dd67, cf4a0d840ecc72fcf16198d5e9c505ab7d5a5e4d
LinuxLinux Kernel5.5 up to, but not including, 5.10.210; 5.11 up to, but not including, 5.15.149; 5.16 up to, but not including, 6.1.76; 6.2 up to, but not including, 6.6.15; 6.7 up to, but not including, 6.7.3; 6.85.10.210, 5.15.149, 6.1.76, 6.6.15, 6.7.3

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
HighData or code can be modified at will.
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:H/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.17.8HighCNA
CVSS 3.17.8HighNVD

Official description

In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: fix a memory corruption iwl_fw_ini_trigger_tlv::data is a pointer to a __le32, which means that if we copy to iwl_fw_ini_trigger_tlv::data + offset while offset is in bytes, we'll write past the buffer.

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

The underlying weakness: Out-of-bounds Write

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

How developers prevent this class of flaw

  • Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, many languages that perform their own memory management, such as Java and Perl, are not subject to buffer overflows. Other languages, such as Ada and C#, typically provide overflow protection, but the protection can be disabled by the programmer. Be wary that a language's interface to native code may still be subject to overflows, even if the language itself is theoretically safe.
  • Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. Examples include the Safe C String Library (SafeStr) by Messier and Viega, and the Strsafe.h library from Microsoft. These libraries provide safer versions of overflow-prone string-handling functions.
  • Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index checking. D3-SFCV (Stack Frame Canary Validation) from D3FEND discusses canary-based detection in detail.

More Out-of-bounds Write vulnerabilities (CWE-787)

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 Write vulnerabilities

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