In the Linux kernel, the following vulnerability has been resolved: iomap: don't free integrity payload that doesn't exist fs_bio_integrity_alloc… (CVE-2026-89770)
A vulnerability in the Linux kernel related to iomap handling of integrity payloads has been resolved. The issue occurs because fs_bio_integrity_alloc may not allocate a bio integrity payload if PI verification is disabled on the block device, leading to a potential NULL pointer dereference when fs_bio_integrity_free is called without checking. The fix ensures that the code checks for the existence of the integrity payload before freeing it, preventing this error.
AI Analysis
Technical Summary
The Linux kernel vulnerability (CVE-2026-89770) involves improper handling of bio integrity payloads in the iomap subsystem. Specifically, fs_bio_integrity_alloc might not allocate a bio integrity payload if protection information (PI) verification is disabled on the block device. However, iomap_bio_read_folio_range_sync calls fs_bio_integrity_free without verifying the payload's existence, causing a NULL pointer dereference. The patch adds a check to avoid freeing a non-existent integrity payload and aligns the code path with PI verification requirements.
Potential Impact
This vulnerability could lead to a NULL pointer dereference in the Linux kernel, potentially causing a kernel crash or denial of service. There is no indication of code execution or privilege escalation from the provided data.
Mitigation Recommendations
A fix for this vulnerability has been implemented in the Linux kernel. Users should apply the official kernel updates that include this patch to prevent the NULL pointer dereference issue. No additional mitigation steps are indicated.
In the Linux kernel, the following vulnerability has been resolved: iomap: don't free integrity payload that doesn't exist fs_bio_integrity_alloc… (CVE-2026-89770)
Description
A vulnerability in the Linux kernel related to iomap handling of integrity payloads has been resolved. The issue occurs because fs_bio_integrity_alloc may not allocate a bio integrity payload if PI verification is disabled on the block device, leading to a potential NULL pointer dereference when fs_bio_integrity_free is called without checking. The fix ensures that the code checks for the existence of the integrity payload before freeing it, preventing this error.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel vulnerability (CVE-2026-89770) involves improper handling of bio integrity payloads in the iomap subsystem. Specifically, fs_bio_integrity_alloc might not allocate a bio integrity payload if protection information (PI) verification is disabled on the block device. However, iomap_bio_read_folio_range_sync calls fs_bio_integrity_free without verifying the payload's existence, causing a NULL pointer dereference. The patch adds a check to avoid freeing a non-existent integrity payload and aligns the code path with PI verification requirements.
Potential Impact
This vulnerability could lead to a NULL pointer dereference in the Linux kernel, potentially causing a kernel crash or denial of service. There is no indication of code execution or privilege escalation from the provided data.
Mitigation Recommendations
A fix for this vulnerability has been implemented in the Linux kernel. Users should apply the official kernel updates that include this patch to prevent the NULL pointer dereference issue. No additional mitigation steps are indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-p8q7-qqp3-r9v3
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-89770"]
Threat ID: 6aa49ff655bf5e2cf5a865ac
Added to database: 09/12/2026, 00:42:30 UTC
Last enriched: 09/12/2026, 00:47:22 UTC
Last updated: 09/12/2026, 00:47:22 UTC
Views: 1
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