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Mageia 7: 2021-0085 Moderate: Kernel-Linus Use-After-Free and Escalation

mageia
Calendar Grey February 15, 2021
Dist Mageia Esm H88
Mageia 2021-0086 kernel-linus patch resolves key security threats, correcting two flaws for improved stability.
This kernel-linus update is based on upstream 5.10.14 and fixes atleast the following security issues: nbd_add_socket in drivers/block/nbd.c in the Linux kernel through 5.10.12 ha...

Summary

This kernel-linus update is based on upstream 5.10.14 and fixes atleast the following security issues:
nbd_add_socket in drivers/block/nbd.c in the Linux kernel through 5.10.12 has an ndb_queue_rq use-after-free that could be triggered by local attackers (with access to the nbd device) via an I/O request at a certain point during device setup (CVE-2021-3348).
A local privilege escalation was discovered in the Linux kernel before 5.10.13. Multiple race conditions in the AF_VSOCK implementation are caused by wrong locking in net/vmw_vsock/af_vsock.c (CVE-2021-26708).
It also adds the following fixes: - make CONNECTOR builtin to enable PROC_EVENTS (mga#28312)
For other upstream fixes, see the referenced changelogs.

References

- https://bugs.mageia.org/show_bug.cgi?id=28341

- https://bugs.mageia.org/show_bug.cgi?id=28312

- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.13

- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.14

- https://www.cve.org/CVERecord?id=CVE-2021-3348

- https://www.cve.org/CVERecord?id=CVE-2021-26708

Topics%20covered

Topics Covered

security advisory moderate privilege escalation moderate severity kernel Linux kernel attack vector use-after-free Mageia kernel-linus

Resolution

SRPMS

- 7/core/kernel-linus-5.10.14-1.mga7

Publication date: 15 Feb 2021
URL: https://advisories.mageia.org/MGASA-2021-0085.html
Type: security
CVE: CVE-2021-3348, CVE-2021-26708

Topics%20covered

Topics Covered

security advisory moderate privilege escalation moderate severity kernel Linux kernel attack vector use-after-free Mageia kernel-linus

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