vulnerability
Ubuntu: (CVE-2022-49376): linux vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:L/AC:L/Au:S/C:N/I:N/A:C) | Feb 26, 2025 | Mar 19, 2025 | Sep 1, 2025 |
Description
In the Linux kernel, the following vulnerability has been resolved:
scsi: sd: Fix potential NULL pointer dereference
If sd_probe() sees an early error before sdkp->device is initialized,
sd_zbc_release_disk() is called. This causes a NULL pointer dereference
when sd_is_zoned() is called inside that function. Avoid this by removing
the call to sd_zbc_release_disk() in sd_probe() error path.
This change is safe and does not result in zone information memory leakage
because the zone information for a zoned disk is allocated only when
sd_revalidate_disk() is called, at which point sdkp->disk_dev is fully set,
resulting in sd_disk_release() being called when needed to cleanup a disk
zone information using sd_zbc_release_disk().
Solutions
References
- CVE-2022-49376
- https://attackerkb.com/topics/CVE-2022-49376
- CWE-476
- URL-https://git.kernel.org/linus/05fbde3a77a4f1d62e4c4428f384288c1f1a0be5
- URL-https://git.kernel.org/stable/c/05fbde3a77a4f1d62e4c4428f384288c1f1a0be5
- URL-https://git.kernel.org/stable/c/0fcb0b131cc90c8f523a293d84c58d0c7273c96f
- URL-https://git.kernel.org/stable/c/3733439593ad12f7b54ae35c273ea6f15d692de3
- URL-https://git.kernel.org/stable/c/78f8e96df06e2d04d82d4071c299b59d28744f47
- URL-https://git.kernel.org/stable/c/c1f0187025905e9981000d44a92e159468b561a8
- URL-https://www.cve.org/CVERecord?id=CVE-2022-49376
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