scsi: block: Fix zones_cond out-of-bounds write on zone report
blk_revalidate_disk_zones() sizes the zones_cond array from the disk
capacity and zone size, but the index used by blk_revalidate_zone_cond()
comes from the device-driven report_zones() walk and is never checked
against the array size. A device reporting more zones than fit the array
makes blk_zone_set_cond() write out of bounds.
One way to reach this is a zone count exceeding 32 bits: both
blk_revalidate_zone_args.nr_zones and struct zoned_disk_info.nr_zones are
unsigned int, so a disk advertising more than UINT_MAX zones (e.g. 2^32 +
1024 zones of one 512-byte logical block) gets its zone count truncated to
a small value, undersizing the array while the report walk keeps counting
upward.
Check the index against the array size before storing the zone condition,
and refuse to revalidate when the zone count does not fit 32 bits.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux | unaffected |
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| Linux | Linux | affected |
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Solution
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Workaround
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Sun, 18 Oct 2026 18:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-119 |
Sun, 18 Oct 2026 15:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | In the Linux kernel, the following vulnerability has been resolved: scsi: block: Fix zones_cond out-of-bounds write on zone report blk_revalidate_disk_zones() sizes the zones_cond array from the disk capacity and zone size, but the index used by blk_revalidate_zone_cond() comes from the device-driven report_zones() walk and is never checked against the array size. A device reporting more zones than fit the array makes blk_zone_set_cond() write out of bounds. One way to reach this is a zone count exceeding 32 bits: both blk_revalidate_zone_args.nr_zones and struct zoned_disk_info.nr_zones are unsigned int, so a disk advertising more than UINT_MAX zones (e.g. 2^32 + 1024 zones of one 512-byte logical block) gets its zone count truncated to a small value, undersizing the array while the report walk keeps counting upward. Check the index against the array size before storing the zone condition, and refuse to revalidate when the zone count does not fit 32 bits. | |
| Title | scsi: block: Fix zones_cond out-of-bounds write on zone report | |
| First Time appeared |
Linux
Linux linux Kernel |
|
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
|
| References |
|
Projects
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MITRE
Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2026-10-18T15:20:05.961Z
Reserved: 2026-09-25T10:25:14.361Z
Link: CVE-2026-98635
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-10-18T16:17:16.607
Modified: 2026-10-18T16:17:16.607
Link: CVE-2026-98635
Redhat
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OpenCVE Enrichment
Updated: 2026-10-18T18:15:15Z
No weakness.