| Summary: | Update request: kernel-linus-5.10.19-1.mga8 | ||
|---|---|---|---|
| Product: | Mageia | Reporter: | Thomas Backlund <tmb> |
| Component: | Security | Assignee: | QA Team <qa-bugs> |
| Status: | RESOLVED FIXED | QA Contact: | Sec team <security> |
| Severity: | normal | ||
| Priority: | Normal | CC: | ouaurelien, sysadmin-bugs |
| Version: | 8 | Keywords: | advisory, validated_update |
| Target Milestone: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | MGA8-64-OK | ||
| Source RPM: | kernel-linus | CVE: | |
| Status comment: | |||
|
Description
Thomas Backlund
2021-02-27 15:12:41 CET
Aurelien Oudelet
2021-02-28 21:12:45 CET
Blocks:
(none) =>
28429 Same on a MGA8 x86_64 with Plasma on Core i5 3570K with a Nvidia Geforce GTX 670. Stable system and all peripherals are OK. MGA8-64-OK for me Whiteboard:
(none) =>
MGA8-64-OK
Aurelien Oudelet
2021-03-01 14:49:24 CET
Blocks:
28429 =>
(none)
advisory, added tp svn:
type: security
subject: Updated kernel-linus packages fix security vulnerabilities
CVE:
- CVE-2021-26930
- CVE-2021-26931
- CVE-2021-26932
src:
8:
core:
- kernel-linus-5.10.19-1.mga8
description: |
This kernel-linus update is based on upstream 5.10.19 and fixes atleast
the following security issues:
An issue was discovered in the Linux kernel 3.11 through 5.10.16, as used
by Xen. To service requests to the PV backend, the driver maps grant
references provided by the frontend. In this process, errors may be
encountered. In one case, an error encountered earlier might be
discarded by later processing, resulting in the caller assuming
successful mapping, and hence subsequent operations trying to access
space that wasn't mapped. In another case, internal state would be
insufficiently updated, preventing safe recovery from the error
(CVE-2021-26930).
An issue was discovered in the Linux kernel 2.6.39 through 5.10.16, as
used in Xen. Block, net, and SCSI backends consider certain errors a
plain bug, deliberately causing a kernel crash. For errors potentially
being at least under the influence of guests (such as out of memory
conditions), it isn't correct to assume a plain bug. Memory allocations
potentially causing such crashes occur only when Linux is running in
PV mode, though (CVE-2021-26931).
An issue was discovered in the Linux kernel 3.2 through 5.10.16, as used
by Xen. Grant mapping operations often occur in batch hypercalls, where
a number of operations are done in a single hypercall, the success or
failure of each one is reported to the backend driver, and the backend
driver then loops over the results, performing follow-up actions based
on the success or failure of each operation. Unfortunately, when running
in PV mode, the Linux backend drivers mishandle this: Some errors are
ignored, effectively implying their success from the success of related
batch elements. In other cases, errors resulting from one batch element
lead to further batch elements not being inspected, and hence successful
ones to not be possible to properly unmap upon error recovery. Only
systems with Linux backends running in PV mode are vulnerable. Linux
backends run in HVM / PVH modes are not vulnerable (CVE-2021-26932).
It also adds the following fixes:
- enable ACPI_EC_DEBUGFS (mga#28415)
For other upstream fixes, see the referenced changelogs.
references:
- https://bugs.mageia.org/show_bug.cgi?id=28471
- https://bugs.mageia.org/show_bug.cgi?id=28415
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.15
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.16
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.17
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.18
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.19
Validating. Advisory already pushed to SVN. Keywords:
(none) =>
advisory, validated_update An update for this issue has been pushed to the Mageia Updates repository. https://advisories.mageia.org/MGASA-2021-0102.html Resolution:
(none) =>
FIXED |