CVE-2026-72030: Linux Vulnerability

Description

In the Linux kernel, the following vulnerability has been resolved: ata: libata-core: Reject an invalid concurrent positioning ranges count ata_dev_config_cpr() takes the number of range descriptors from buf[0] of the concurrent positioning ranges log (up to 255), which the device reports independently of the log size in the GPL directory. The count is then walked at a fixed 32-byte stride in two places with no bound: the log read here, and the INQUIRY VPD page B9h emitter, which writes one descriptor per range into the fixed 2048-byte ata_scsi_rbuf. A device reporting a count larger than its own log overflows the read buffer (up to 7704 bytes past a 512-byte slab), and a count above 62 overflows the response buffer on the emit side. Bound the count once, on probe, against both the log the device returned and the number of descriptors the VPD B9h response buffer can hold (ATA_DEV_MAX_CPR, derived from the rbuf size). Reject an out-of-range count with a warning; this keeps the emitter in bounds with no separate change there.

Metrics

EPSS Probability

0.20%

10.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

Vendor	Product	Versions
Linux	Linux	>= fe22e1c2f705676a705d821301fc52eecc2fe055, < 01d7d321e6046f87ba270aeeffdc5260209bd91e; >= fe22e1c2f705676a705d821301fc52eecc2fe055, < 4cb4b4dd8853c4ab3057efe238b2c34277772176; >= fe22e1c2f705676a705d821301fc52eecc2fe055, < b1607f0ee5f5e53e0aa66f41794085b7cc98f5d1; >= fe22e1c2f705676a705d821301fc52eecc2fe055, < 4c1e8ccd8655ee8cf1bcb1b7dfee72c9fa941fd4; >= fe22e1c2f705676a705d821301fc52eecc2fe055, < d43efd1b5d976203e6f1ef26f67e8b1a7bc2751b; >= fe22e1c2f705676a705d821301fc52eecc2fe055, < 533a0b940f901c15e5cbbd4b5d66e871c209e8ce
Linux	Linux	5.16

References

Timeline

Published: Aug 15, 2026
Last Modified: Aug 23, 2026
Status: Received

Frequently Asked Questions

What is CVE-2026-72030?

In the Linux kernel, the following vulnerability has been resolved: ata: libata-core: Reject an invalid concurrent positioning ranges count ata_dev_config_cpr() takes the number of range descriptors from buf[0] of the concurrent positioning ranges log (up to 255), which the device reports independently of the log size in the GPL directory. The count is then walked at a fixed 32-byte stride in two places with no bound: the log read here, and the INQUIRY VPD page B9h emitter, which writes one descriptor per range into the fixed 2048-byte ata_scsi_rbuf. A device reporting a count larger than its own log overflows the read buffer (up to 7704 bytes past a 512-byte slab), and a count above 62 overflows the response buffer on the emit side. Bound the count once, on probe, against both the log the device returned and the number of descriptors the VPD B9h response buffer can hold (ATA_DEV_MAX_CPR, derived from the rbuf size). Reject an out-of-range count with a warning; this keeps the emitter in bounds with no separate change there.

How severe is CVE-2026-72030?

Severity scoring for CVE-2026-72030 is pending analysis. The EPSS model estimates a 0.20% probability of exploitation in the next 30 days.

How do I fix CVE-2026-72030?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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