CVEvulnerability
CVE-2021-33033
7.8 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2021-05-14
- Last modified
- 2026-08-05
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 4.6 MEDIUM — AV:L/AC:L/Au:N/C:P/I:P/A:P
- Weaknesses
- CWE-416
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 configurations
• linux linux kernel (>= 2.6.28 < 4.9.298)
• linux linux kernel (>= 4.10 < 4.14.226)
• linux linux kernel (>= 4.15 < 4.19.181)
• linux linux kernel (>= 4.20 < 5.4.106)
• linux linux kernel (>= 5.5 < 5.10.24)
• linux linux kernel (>= 5.11 < 5.11.7)
Related
Weakness · CWE (1)
- CWE-416 Use After Free weakness
References
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.14 Mailing List, Patch, Vendor Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.7 Mailing List, Patch, Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1165affd484889d4986cf3b724318935a0b120d8 Mailing List, Patch, Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad5d07f4a9cd671233ae20983848874731102c08 Mailing List, Patch, Vendor Advisory
- https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-cipso_v4_genopt Exploit, Third Party Advisory
- https://syzkaller.appspot.com/bug?id=96e7d345748d8814901c91cd92084ed04b46701e Exploit, Mailing List, Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.14 Mailing List, Patch, Vendor Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.7 Mailing List, Patch, Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1165affd484889d4986cf3b724318935a0b120d8 Mailing List, Patch, Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad5d07f4a9cd671233ae20983848874731102c08 Mailing List, Patch, Vendor Advisory
- https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-cipso_v4_genopt Exploit, Third Party Advisory
- https://syzkaller.appspot.com/bug?id=96e7d345748d8814901c91cd92084ed04b46701e Exploit, Mailing List, Third Party Advisory