CVE-2021-22600
Double Free in net/packet/af_packet.c leading to priviledge escalation
- State
- Published
- Severity
- 6.6 Medium
- Published
- Jan 26, 2022
- Updated
- Oct 21, 2025
- Reserved
- Jan 5, 2021
Description
A double free bug in packet_set_ring() in net/packet/af_packet.c can be exploited by a local user through crafted syscalls to escalate privileges or deny service. We recommend upgrading kernel past the effected versions or rebuilding past ec6af094ea28f0f2dda1a6a33b14cd57e36a9755
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.6 Medium | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:H |
Weaknesses
- CWE-415 Double Free
Affected Products
| Product | Versions |
|---|---|
KernelLinux Kernel |
|
References
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=ec6af094ea28f0f2dda1a6a33b14cd57e36a9755
- [debian-lts-announce] 20220309 [SECURITY] [DLA 2941-1] linux-4.19 security updatemailing-list
- DSA-5096vendor-advisory
- https://security.netapp.com/advisory/ntap-20230110-0002/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22600government-resource
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