Out-of-bounds Read in Linux Kernel
CVE-2021-27364
An issue was discovered in the Linux kernel through 5.11.3. drivers/scsi/scsi_transport_iscsi.c is adversely affected by the ability of an unprivileged user to craft Netlink messages.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.
EPSS exploit prediction
EPSS: 0.010 (60.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: +0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
- ARPSyndicate/cvemon
- Iweisc/Kernel-Module-192CV
- aaronxie55/Presentation2_
- bollwarm/SecToolSet
- c4pt000/kernel-5.11.6-expSEHDsec-HAXM-cgroup-virtio-nvidia-amd-kaliwifi
- c4pt000/kernel-6.6.0-expSEHDsec-HAXM-cgroup-virtio-nvidia-amd-kaliwifi
- c4pt000/kernel-6.8.2-expSEHDsec-HAXM-cgroupvirtio
- c4pt000/kernel-6.8.3-expSEHDsec-fclock-fsync-cpu
- kdn111/linux-kernel-exploitation
- khanhdn111/linux-kernel-exploitation
References
- lists.debian.org/debian-lts-announce/2021/03/msg00010.html (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2021/03/msg00035.html (mailing-list, Mailing List, Third Party Advisory)
- www.oracle.com/security-alerts/cpuoct2021.html (Patch, Third Party Advisory)
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Mailing List, Vendor Advisory)
- www.openwall.com/lists/oss-security/2021/03/06/1 (Mailing List, Third Party Advisory)
- bugzilla.suse.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.html (Exploit, Third Party Advisory)
- packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075… (VDB Entry, Third Party Advisory)
- security.netapp.com/advisory/ntap-20210409-0001/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-27364?
- CVE-2021-27364 is a high-severity vulnerability in Linux Kernel, classified under Out-of-bounds Read. CVSS score: 7.1/10. Published 2021-03-07.
- How severe is CVE-2021-27364?
- High severity. CVSS v3 base score is 7.1 out of 10.
- Is CVE-2021-27364 known to be exploited?
- 23 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.