Bug 2025726 (CVE-2021-4002)
Summary: | CVE-2021-4002 kernel: possible leak or coruption of data residing on hugetlbfs | ||
---|---|---|---|
Product: | [Other] Security Response | Reporter: | Michael Kaplan <mkaplan> |
Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
Status: | CLOSED ERRATA | QA Contact: | |
Severity: | medium | Docs Contact: | |
Priority: | medium | ||
Version: | unspecified | CC: | acaringi, adscvr, airlied, alciregi, allarkin, aquini, bdettelb, bhu, blc, brdeoliv, bskeggs, chwhite, crwood, dhoward, dvlasenk, fhrbata, fpacheco, hdegoede, hkrzesin, jarod, jarodwilson, jburrell, jeremy, jforbes, jglisse, jlelli, jonathan, josef, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, mchehab, mlangsdo, mvanderw, nmurray, ptalbert, qzhao, rvrbovsk, security-response-team, steved, vkumar, walters, williams |
Target Milestone: | --- | Keywords: | Security |
Target Release: | --- | ||
Hardware: | All | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | kernel 5.16 rc3 | Doc Type: | If docs needed, set a value |
Doc Text: |
A memory leak flaw in the Linux kernel's hugetlbfs memory usage was found in the way the user maps some regions of memory twice using shmget() which are aligned to PUD alignment with the fault of some of the memory pages. A local user could use this flaw to get unauthorized access to some data.
|
Story Points: | --- |
Clone Of: | Environment: | ||
Last Closed: | 2022-05-11 12:45:33 UTC | Type: | --- |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: | |||
Bug Depends On: | 2026494, 2026376, 2026377, 2026378, 2026926 | ||
Bug Blocks: | 2025723, 2025729 |
Description
Michael Kaplan
2021-11-22 20:22:19 UTC
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 2026926] This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2022:1975 https://access.redhat.com/errata/RHSA-2022:1975 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2022:1988 https://access.redhat.com/errata/RHSA-2022:1988 This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2021-4002 |