CVE-2021-3347

HIGH

7.8

CVSS Score

Published: January 29, 2021 at 04:56 PM UTC

Updated: June 17, 2026 at 04:04 AM UTC

3 products affected across 3 vendorsLinux KernelDebian LinuxFedora

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Severity

HIGH7.8

Exploit prediction

EPSS 1%

SSVC

PoC

Description

An issue was discovered in the Linux kernel through 5.10.11. PI futexes have a kernel stack use-after-free during fault handling, allowing local users to execute code in the kernel, aka CID-34b1a1ce1458.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux · Debiandrupal

95%

10.0 9.0

Fedora · Fedora Projectrpm

95%

32 33

Linux Kernel · Linux

95%

v ≤ 5.10.11

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (19)

Mailing Listx_refsource_MLISTThird Party Advisory

Source: [email protected]

http://www.openwall.com/lists/oss-security/2021/01/29/4

Mailing Listx_refsource_MLISTThird Party Advisory

Source: [email protected]

http://www.openwall.com/lists/oss-security/2021/01/29/5

Mailing Listx_refsource_MLISTExploitThird Party Advisory

Source: [email protected]

http://www.openwall.com/lists/oss-security/2021/02/01/4