HighFix available
s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup Fix Oops in dasd_alias_get_start_dev() function caused by the pavgroup pointer being NULL. The pavgroup pointer is checked on the entrance of the function but without the lcu->lock being held. Therefore there is a race window between dasd_alias_get_start_dev() and _lcu_update() which sets pavgroup to NULL with the lcu->lock held. Fix by checking the pavgroup pointer with lcu->lock held.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 4.14.295, 4.19.260, 4.9.330, 5.10.146, 5.15.71, 5.19.12, 5.4.215
- CVEs
- CVE-2022-48636
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 00:58 UTC · Revision 1
Source evidence
s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup
core-osv · Original sourcePublished 28 Apr 2024, 12:59 UTC
In the Linux kernel, the following vulnerability has been resolved: s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup Fix Oops in dasd_alias_get_start_dev() function caused by the pavgroup pointer being NULL. The pavgroup pointer is checked on the entrance of the function but without the lcu->lock being held. Therefore there is a race window between dasd_alias_get_start_dev() and _lcu_update() which sets pavgroup to NULL with the lcu->lock held. Fix by checking the pavgroup pointer with lcu->lock held.
osv:CVE-2022-48636
Kernel
Fixed versions: 4.9.330, 4.14.295, 4.19.260, 5.4.215, 5.10.146, 5.15.71, 5.19.12
Complete source record
{
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"url": "https://osv.dev/vulnerability/CVE-2022-48636",
"method": "structured",
"payload": {
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"title": "s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup",
"summary": "In the Linux kernel, the following vulnerability has been resolved: s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup Fix Oops in dasd_alias_get_start_dev() function caused by the pavgroup pointer being NULL. The pavgroup pointer is checked on the entrance of the function but without the lcu->lock being held. Therefore there is a race window between dasd_alias_get_start_dev() and _lcu_update() which sets pavgroup to NULL with the lcu->lock held. Fix by checking the pavgroup pointer with lcu->lock held.",
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"modified": "2026-10-28T02:30:24.753796238Z",
"provider": "osv",
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"source_id": "core-osv",
"document_id": 491315,
"published_at": "2024-04-28T12:59:28.858+00:00"
}