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TI-2020-18034 Aliases CVE-2020-35513GHSA-7qpq-c35p-wc3c

A flaw incorrect umask during file or directory modification in the Linux kernel NFS…

Priority LOW 25CWE-271Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 9 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

A flaw incorrect umask during file or directory modification in the Linux kernel NFS (network file system) functionality was found in the way user create and delete object using NFSv4.2 or newer if both simultaneously accessing the NFS by the other process that is not using new NFSv4.2. A user with access to the NFS could use this flaw to starve the resources causing denial of service.

Why it matters now

EPSS 0.01364 71st percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 9 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—kernelbefore kernel 4.17-rc1—No fix listedCNA
  • kernel Vendor— Affected before kernel 4.17-rc1 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:4.2:*:*:*:*:*:*:*4.2VulnerableLinux
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
  • cpe:2.3:o:linux:linux_kernel:4.2:*:*:*:*:*:*:* Versions 4.2 Vulnerable ·Linux
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat

Remediation

Red Hat 2 advisories

  • RHSA-2021:0336 Released 2021-02-02 · Red Hat rating Moderate
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Client (v. 7) bpftool-3.10.0-1160.15.2.el7, kernel-3.10.0-1160.15.2.el7, kernel-abi-whitelists-3.10.0-1160.15.2.el7 +8
    • Red Hat Enterprise Linux Client Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.15.2.el7
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.15.2.el7
    • Red Hat Enterprise Linux Server (v. 7) bpftool-3.10.0-1160.15.2.el7, kernel-3.10.0-1160.15.2.el7, kernel-abi-whitelists-3.10.0-1160.15.2.el7 +11
    • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debug-devel-3.10.0-1160.15.2.el7, kernel-tools-libs-devel-3.10.0-1160.15.2.el7
    • Red Hat Enterprise Linux Workstation (v. 7) bpftool-3.10.0-1160.15.2.el7, kernel-3.10.0-1160.15.2.el7, kernel-abi-whitelists-3.10.0-1160.15.2.el7 +8
    • Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.15.2.el7
  • RHSA-2021:0338 Released 2021-02-02 · Red Hat rating Moderate
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt-3.10.0-1160.15.2.rt56.1152.el7, kernel-rt-debug-3.10.0-1160.15.2.rt56.1152.el7, kernel-rt-debug-devel-3.10.0-1160.15.2.rt56.1152.el7 +4
    • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt-3.10.0-1160.15.2.rt56.1152.el7, kernel-rt-debug-3.10.0-1160.15.2.rt56.1152.el7, kernel-rt-debug-devel-3.10.0-1160.15.2.rt56.1152.el7 +7

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix yet
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2021:0336
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2021:0336
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2021:0336
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2021:0336
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2021:0336
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2021:0336
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2021:0336
Red Hat Enterprise Linux for Real Time (v. 7)Fixed RHSA-2021:0338
Red Hat Enterprise Linux for Real Time for NFV (v. 7)Fixed RHSA-2021:0338
Not affected: 5 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux Client (v. 7)
  • Red Hat Enterprise Linux Server (v. 7)
  • Red Hat Enterprise Linux Workstation (v. 7)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-35513
  2. 2026-10-03 Alias added: GHSA-7qpq-c35p-wc3c

References

Patch 1

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences