CVE-2021-38201: linux linux_kernel
CVSS: 7.5v3.1HighModified
AliasesRHSA-2021:3440UBUNTU-CVE-2021-38201
Published 08-08-2021Last modified 04-08-2024
Vulnerability summary
CVE-2021-38201 is a high (CVSS 7.5) vulnerability in linux linux_kernel. EPSS estimates a 3.36% chance of exploitation in the next 30 days, higher than 88.5% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
3.36%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 4 · Related 3Timeline
- 08-08-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
net/sunrpc/xdr.c in the Linux kernel before 5.13.4 allows remote attackers to cause a denial of service (xdr_set_page_base slab-out-of-bounds access) by performing many NFS 4.2 READ_PLUS operations.
CVSS metrics
4 scores · 3 sources · 2 versionsHigh 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 3 agree
- OSV · Red hatEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
3.36%
Chance of exploitation in the next 30 days
Percentile
89%
Versus all other CVEs
30-day change
0.00 pp
From 3.36% on 18-09-2026
18-09-202618-10-2026
EPSS score3.36%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu28 products
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11< 5.11.0-1019.20~20.04.1
- linux-aws-5.3All versions (No fix recorded)
- linux-aws-5.8All versions (No fix recorded)
- linux-azureAll versions (No fix recorded)
Redhat15 products
- kernel-rt< 0:4.18.0-305.17.1.rt7.89.el8_4
- kernel-rt-core< 0:4.18.0-305.17.1.rt7.89.el8_4
- kernel-rt-debug< 0:4.18.0-305.17.1.rt7.89.el8_4
- kernel-rt-debug-core< 0:4.18.0-305.17.1.rt7.89.el8_4
- kernel-rt-debug-debuginfo< 0:4.18.0-305.17.1.rt7.89.el8_4
Netapp4 products
Linux1 product
- linux_kernel≥ 5.11.0, < 5.12.19 | ≥ 5.13.0, < 5.13.4
4 vendors · 48 products
References
14 links- cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4X Refsource MISCREPORTMailing ListPatchVendor Advisory
- github.com/torvalds/linux/commit/6d1c0f3d28f98ea2736128ed3e46821496dc3a8cX Refsource MISCREPORTPatchThird Party Advisory
