CVE-2022-49376: scsi: sd: Fix potential NULL pointer dereference
First published: Wed Feb 26 2025(Updated: )
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().
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=4.10<5.10.122 | |
| Linux Kernel | >=5.11<5.15.47 | |
| Linux Kernel | >=5.16<5.17.15 | |
| Linux Kernel | >=5.18<5.18.4 |
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Reference Links
- https://git.kernel.org/stable/c/c1f0187025905e9981000d44a92e159468b561a8
- https://git.kernel.org/stable/c/0fcb0b131cc90c8f523a293d84c58d0c7273c96f
- https://git.kernel.org/stable/c/78f8e96df06e2d04d82d4071c299b59d28744f47
- https://git.kernel.org/stable/c/3733439593ad12f7b54ae35c273ea6f15d692de3
- https://git.kernel.org/stable/c/05fbde3a77a4f1d62e4c4428f384288c1f1a0be5
Frequently Asked Questions
What is the severity of CVE-2022-49376?
CVE-2022-49376 has been classified as a medium severity vulnerability in the Linux kernel.
How do I fix CVE-2022-49376?
To fix CVE-2022-49376, update the Linux kernel to a version that includes the patch addressing this vulnerability.
What versions of the Linux kernel are affected by CVE-2022-49376?
CVE-2022-49376 affects Linux kernel versions between 4.10 and 5.10.122, 5.11 to 5.15.47, 5.16 to 5.17.15, and 5.18 to 5.18.4.
What is the impact of CVE-2022-49376?
The impact of CVE-2022-49376 is a potential NULL pointer dereference, which could lead to a system crash or instability.
When was CVE-2022-49376 resolved?
CVE-2022-49376 was resolved with patches released in the Linux kernel updates following the identification of the vulnerability.
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