Bug 1903244 (CVE-2020-29368)
| Summary: | CVE-2020-29368 kernel: the copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check | ||
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| Product: | [Other] Security Response | Reporter: | Guilherme de Almeida Suckevicz <gsuckevi> |
| 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, bhu, bmasney, brdeoliv, bskeggs, dhoward, dvlasenk, fhrbata, hdegoede, hkrzesin, itamar, jarod, jarodwilson, jeremy, jforbes, jlelli, jonathan, josef, jshortt, jstancek, jwboyer, kcarcia, kdudka, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, mchehab, mjg59, nmurray, ptalbert, qzhao, rvrbovsk, steved, walters, williams |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: |
An issue was discovered in __split_huge_pmd in mm/huge_memory.c in the Linux kernel. The copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2021-11-09 19:52:50 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: | 1981692, 1903245, 1974659, 1974660, 2089089, 2089090, 2089412, 2089413 | ||
| Bug Blocks: | 1903246 | ||
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Description
Guilherme de Almeida Suckevicz
2020-12-01 17:09:20 UTC
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 1903245] This was fixed for Fedora with the 5.7.5 stable kernel updates. This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2021:4140 https://access.redhat.com/errata/RHSA-2021:4140 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2021:4356 https://access.redhat.com/errata/RHSA-2021:4356 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-2020-29368 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Extended Update Support Via RHSA-2022:5224 https://access.redhat.com/errata/RHSA-2022:5224 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Extended Update Support Via RHSA-2022:5220 https://access.redhat.com/errata/RHSA-2022:5220 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.4 Extended Update Support Via RHSA-2022:5626 https://access.redhat.com/errata/RHSA-2022:5626 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.4 Extended Update Support Via RHSA-2022:5633 https://access.redhat.com/errata/RHSA-2022:5633 |