Bug 1695049 (CVE-2019-10124)
| Summary: | CVE-2019-10124 kernel: hwpoison implementation in mm/memory-failure.c leads to denial of service | ||
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| Product: | [Other] Security Response | Reporter: | msiddiqu |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED NOTABUG | QA Contact: | |
| Severity: | low | Docs Contact: | |
| Priority: | low | ||
| Version: | unspecified | CC: | acaringi, airlied, bhu, blc, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, jkacur, john.j5live, jonathan, josef, jross, jstancek, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, plougher, rt-maint, rvrbovsk, steved, vdronov, 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: |
A bug was discovered in the hwpoison implementation in mm/memory-failure.c in the Linux kernel. When soft_offline_in_use_page() is run for a thp tail page after pmd is split, a privileged attacker can cause a denial of service (DoS). Privileged access is required for an attacker to trigger this bug, thus, we believe this bug is not a security flaw.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2019-04-11 12:13:03 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: | 1695050 | ||
| Bug Blocks: | 1695052 | ||
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Description
msiddiqu
2019-04-02 11:45:55 UTC
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 1695050] This was fixed for Fedora with the 5.0.4 stable kernel updates Note: A privileges access (a real "root") is required for an attacker to trigger this bug. Henceforth, we believe this bug is not a security flaw.
For example, soft_offline_in_use_page() can be called by soft_offline_page which in turn is called from madvise_inject_error() which allows to execute it only by a privileged user (a real "root"):
[mm/madvise.c]
static int madvise_inject_error(int behavior, unsigned long start, unsigned long end)
{ ...
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
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