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CVE-2021-33033

nvd nist
Published: May 14, 2021Modified: Aug 5, 2026

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7.8
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploitability: 1.8 / Impact: 5.9
Source: NVD

Description

The Linux kernel before 5.11.14 has a use-after-free in cipso_v4_genopt in net/ipv4/cipso_ipv4.c because the CIPSO and CALIPSO refcounting for the DOI definitions is mishandled, aka CID-ad5d07f4a9cd. This leads to writing an arbitrary value.

Affected (6)

Products: Linux: Linux Kernel
Linux
1 product
Linux Kernel
Configuration A
6 vulnerable
Vulnerable SoftwareAffected Versions
Linux
Linux Kernel
From 2.6.28 to 4.9.298
Linux Kernel
From 4.10 to 4.14.226
Linux Kernel
From 4.15 to 4.19.181
Linux Kernel
From 4.20 to 5.4.106
Linux Kernel
From 5.11 to 5.11.7
Linux Kernel
From 5.5 to 5.10.24

Related CWEs

CWE-416
Use After Free
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (12)

Source: cve@mitre.org
Mailing ListPatchVendor Advisory
Source: cve@mitre.org
Mailing ListPatchVendor Advisory
Source: cve@mitre.org
Mailing ListPatchVendor Advisory
Source: cve@mitre.org
Mailing ListPatchVendor Advisory
Source: cve@mitre.org
ExploitThird Party Advisory
Source: cve@mitre.org
ExploitMailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing ListPatchVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing ListPatchVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing ListPatchVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing ListPatchVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
ExploitThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
ExploitMailing ListThird Party Advisory

Timeline

No history available yet.