CVE-2022-48726

Source
https://nvd.nist.gov/vuln/detail/CVE-2022-48726
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-48726.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-48726
Related
Published
2024-06-20T12:15:11Z
Modified
2024-09-18T17:49:01.468944Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

RDMA/ucma: Protect mc during concurrent multicast leaves

Partially revert the commit mentioned in the Fixes line to make sure that allocation and erasing multicast struct are locked.

BUG: KASAN: use-after-free in ucmacleanupmulticast drivers/infiniband/core/ucma.c:491 [inline] BUG: KASAN: use-after-free in ucmadestroyprivatectx+0x914/0xb70 drivers/infiniband/core/ucma.c:579 Read of size 8 at addr ffff88801bb74b00 by task syz-executor.1/25529 CPU: 0 PID: 25529 Comm: syz-executor.1 Not tainted 5.16.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: _dumpstack lib/dumpstack.c:88 [inline] dumpstacklvl+0xcd/0x134 lib/dumpstack.c:106 printaddressdescription.constprop.0.cold+0x8d/0x320 mm/kasan/report.c:247 _kasanreport mm/kasan/report.c:433 [inline] kasanreport.cold+0x83/0xdf mm/kasan/report.c:450 ucmacleanupmulticast drivers/infiniband/core/ucma.c:491 [inline] ucmadestroyprivatectx+0x914/0xb70 drivers/infiniband/core/ucma.c:579 ucmadestroyid+0x1e6/0x280 drivers/infiniband/core/ucma.c:614 ucmawrite+0x25c/0x350 drivers/infiniband/core/ucma.c:1732 vfswrite+0x28e/0xae0 fs/readwrite.c:588 ksyswrite+0x1ee/0x250 fs/readwrite.c:643 dosyscallx64 arch/x86/entry/common.c:50 [inline] dosyscall64+0x35/0xb0 arch/x86/entry/common.c:80 entrySYSCALL64afterhwframe+0x44/0xae

Currently the xarray search can touch a concurrently freeing mc as the xaforeach() is not surrounded by any lock. Rather than hold the lock for a full scan hold it only for the effected items, which is usually an empty list.

References

Affected packages

Debian:11 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.103-1

Affected versions

5.*

5.10.46-4
5.10.46-5
5.10.70-1~bpo10+1
5.10.70-1
5.10.84-1
5.10.92-1~bpo10+1
5.10.92-1
5.10.92-2
5.10.103-1~bpo10+1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:12 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.16.10-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.16.10-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}