Bug 1845867 (CVE-2020-10767)
| Summary: | CVE-2020-10767 kernel: Indirect Branch Prediction Barrier is force-disabled when STIBP is unavailable or enhanced IBRS is available. | ||
|---|---|---|---|
| Product: | [Other] Security Response | Reporter: | Wade Mealing <wmealing> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | CC: | acaringi, airlied, asavkov, bhu, blc, bmasney, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jbastian, jeremy, jforbes, jglisse, jlelli, joe.lawrence, john.j5live, jonathan, josef, jpoimboe, jross, jshortt, jstancek, jthierry, jwboyer, kcarcia, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, masami256, matt, mchehab, mcressma, mjg59, mlangsdo, mvanderw, nmurray, pmatouse, ptalbert, qzhao, rhandlin, rt-maint, rvrbovsk, steved, williams, ycote |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Linux kernel 5.8-rc1 | Doc Type: | If docs needed, set a value |
| Doc Text: |
A flaw was found in the Linux kernel’s implementation of the Enhanced IBPB (Indirect Branch Prediction Barrier). The IBPB mitigation will be disabled when STIBP is not available or when the Enhanced Indirect Branch Restricted Speculation (IBRS) is available. This flaw allows a local attacker to perform a Spectre V2 style attack when this configuration is active. The highest threat from this vulnerability is to confidentiality.
|
Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2020-07-21 13:28:21 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: | 1846029, 1847375, 1847376, 1847377, 1847378, 1847379, 1847380, 1847381, 1847382, 1847383, 1847403, 1847404 | ||
| Bug Blocks: | 1845835 | ||
|
Description
Wade Mealing
2020-06-10 09:50:58 UTC
This makes the CPU vulnerable to Spectre v2. Mitigation: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. Created kernel tracking bugs for this issue: Affects: fedora-all [bug 1847375] FEDORA-2020-125ccdc871 has been pushed to the Fedora 32 stable repository. If problem still persists, please make note of it in this bug report. FEDORA-2020-1b2dae6219 has been pushed to the Fedora 31 stable repository. If problem still persists, please make note of it in this bug report. Statement: This flaw is rated as having Important impact, because it enables exploitation of the previous Spectre v2 attack, which has a rating of Important. This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2020:3010 https://access.redhat.com/errata/RHSA-2020:3010 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2020:3016 https://access.redhat.com/errata/RHSA-2020:3016 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-2020-10767 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions Via RHSA-2020:3041 https://access.redhat.com/errata/RHSA-2020:3041 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2020:3073 https://access.redhat.com/errata/RHSA-2020:3073 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.1 Extended Update Support Via RHSA-2020:3222 https://access.redhat.com/errata/RHSA-2020:3222 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.1 Extended Update Support Via RHSA-2020:3297 https://access.redhat.com/errata/RHSA-2020:3297 |