CVE-2022-49852 | riscv: process: fix kernel info leakage

In the Linux kernel, the following vulnerability has been resolved: riscv: process: fix kernel info leakage thread_struct's s[12] may contain random kernel memory content, which may be finally leaked to userspace. This is a security hole. Fix it by clearing the s[12] array in thread_struct when fork. As for kthread case, it's better to clear the s[12] array as well.

Published: 2025-05-01 Last update: 2026-01-23 Assigner: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-49852 is rated Low Risk (32.1/100): CVSS High severity, with low exploitation likelihood (EPSS 0.03%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2022-49852

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-10 0.06% 0.03% -0.03%
2 2026-02-25 0.02% 0.06% +0.04%
3 2026-01-24 — 0.02% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-49852

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.1 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.2 [email protected]

Weakness enumeration for CVE-2022-49852

OS Trackers for CVE-2022-49852

vendor priority summary link
debian not yet assigned CVE-2022-49852 not yet assigned priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2022-49852
redhat — — https://access.redhat.com/security/cve/CVE-2022-49852
suse medium CVE-2022-49852 severity moderate: SUSE including 26 source package names (cluster-md-kmp-default, dlm-kmp-default, …), 267 product×package rows across 51 product lines (SLES-LTSS-TERADATA 15 SP2, SUSE Linux Enterprise High Availability Extension 15 SP7, … (51 product lines)): Known Not Affected 267. https://www.suse.com/security/cve/CVE-2022-49852/
ubuntu medium CVE-2022-49852 medium priority: Ubuntu including 158 source packages (linux, linux-allwinner-5.19, …), 1551 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 1145, released 154, ignored 146, not-affected 105, needs-triage 1. https://ubuntu.com/security/CVE-2022-49852

Affected software / configurations for CVE-2022-49852

Vendor Product Version Raw CPE
linux linux_kernel >= 4.15, < 4.19.267 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 4.20, < 5.4.225 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 5.5, < 5.10.155 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 5.11, < 5.15.79 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 5.16, < 6.0.9 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel 6.1 cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*
linux linux_kernel 6.1 cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*
linux linux_kernel 6.1 cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*
linux linux_kernel 6.1 cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*

References for CVE-2022-49852

cvelogic Threat Intelligence