Out-of-bounds Read in Linux Kernel
CVE-2021-3506
An out-of-bounds (OOB) memory access flaw was found in fs/f2fs/node.c in the f2fs module in the Linux kernel in versions before 5.12.0-rc4. A bounds check failure allows a local attacker to gain access to out-of-bounds memory leading to a system crash or a leak of internal kernel information. The highest threat from this vulnerability is to system availability.
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: 0.004 (28.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- www.openwall.com/lists/oss-security/2021/03/28/2 (Patch, Mailing List, Third Party Advisory)
- www.mail-archive.com/linux-kernel@vger.kernel.org/msg2520013.html (Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2021/05/08/1 (mailing-list, Patch, Mailing List, Third Party Advisory)
- security.netapp.com/advisory/ntap-20210611-0007/ (Third Party Advisory)
- lists.debian.org/debian-lts-announce/2021/06/msg00019.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-3506?
- CVE-2021-3506 is a high-severity vulnerability in Linux Kernel, classified under Out-of-bounds Read. CVSS score: 7.1/10. Published 2021-04-19.
- How severe is CVE-2021-3506?
- High severity. CVSS v3 base score is 7.1 out of 10.
- Is CVE-2021-3506 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.