Bug 1948045 (CVE-2021-3483) - CVE-2021-3483 kernel: use-after-free in nosy driver in nosy_ioctl() in drivers/firewire/nosy.c when a device is added twice
Summary: CVE-2021-3483 kernel: use-after-free in nosy driver in nosy_ioctl() in driver...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2021-3483
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1948046
Blocks: 1946491 1946493
TreeView+ depends on / blocked
 
Reported: 2021-04-09 20:26 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-05-13 14:21 UTC (History)
44 users (show)

Fixed In Version: kernel 5.12-rc6
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the Nosy driver in the Linux kernel. This issue allows a device to be inserted twice into a doubly-linked list, leading to a use-after-free when one of these devices is removed. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Clone Of:
Environment:
Last Closed: 2021-04-09 23:35:17 UTC
Embargoed:

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Description Guilherme de Almeida Suckevicz 2021-04-09 20:26:32 UTC 
A flaw was found in the Nosy driver in the Linux kernel in versions prior to v5.12-rc6. It allows a device to be inserted twice into a doubly linked list, leading to use-after-free when one of these devices is removed.

Reference:
https://www.openwall.com/lists/oss-security/2021/04/07/1

Upstream patch:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=829933ef05a951c8ff140e814656d73e74915faf
Comment 1 Guilherme de Almeida Suckevicz 2021-04-09 20:27:01 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1948046]
Comment 2 Product Security DevOps Team 2021-04-09 23:35:17 UTC 
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-2021-3483
Comment 3 Justin M. Forbes 2021-04-12 21:27:22 UTC 
This was fixed for Fedora with the 5.11.12 stable kernel updates.
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