Buffer overflow in Linux Kernel
CVE-2020-27815
A flaw was found in the JFS filesystem code in the Linux Kernel which allows a local attacker with the ability to set extended attributes to panic the system, causing memory corruption or escalating privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.008 (55.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openwall.com/lists/oss-security/2020/11/30/5 (mailing-list, Exploit, Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2020/12/28/1 (mailing-list, Exploit, Patch, Mailing List, Third Party Advisory)
- www.debian.org/security/2021/dsa-4843 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2021/02/msg00018.html (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2021/03/msg00010.html (mailing-list, Mailing List, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Issue Tracking)
- www.openwall.com/lists/oss-security/2020/11/30/5, (Mailing List)
- www.openwall.com/lists/oss-security/2020/12/28/1, (Mailing List)
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Vendor Advisory)
- security.netapp.com/advisory/ntap-20210702-0004/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2020-27815?
- CVE-2020-27815 is a high-severity vulnerability in Linux Kernel, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2021-05-26.
- How severe is CVE-2020-27815?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2020-27815 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.