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CVE-2026-72023

UnknownEPSS 0.20%

Last modified

CVE-2026-72023 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: octeontx2-pf: fix SQB pointer leak on init failure otx2_init_hw_resources() initializes SQ aura and pool resources before several later setup steps. On failure, err_free_sq_ptrs only frees SQB pages, leaving the per-SQ sqb_ptrs arrays behind. Use otx2_free_sq_res() for the SQ unwind path and let it free sqb_ptrs even when sq->sqe has not been allocated yet. The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. EPSS estimates a 0.20% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: octeontx2-pf: fix SQB pointer leak on init failure otx2_init_hw_resources() initializes SQ aura and pool resources before several later setup steps. On failure, err_free_sq_ptrs only frees SQB pages, leaving the per-SQ sqb_ptrs arrays behind. Use otx2_free_sq_res() for the SQ unwind path and let it free sqb_ptrs even when sq->sqe has not been allocated yet. The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in v7.1.1. An x86_64 allyesconfig build showed no new warnings. As we do not have an OcteonTX2 PF device and the corresponding AF mailbox setup to test with, no runtime testing was able to be performed.

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.

VendorProductVersions
LinuxLinux>= caa2da34fd25a37e9fd43343b6966fb9d730a6d5, < fca9c22633169a6c5d429a32e439121b6419e2be; >= caa2da34fd25a37e9fd43343b6966fb9d730a6d5, < 42c2836f10ac0427dac9e9a923d6ee2189dec544; >= caa2da34fd25a37e9fd43343b6966fb9d730a6d5, < 2cac2eac935ed7e0a9203204e036a1f6090ebc3d; >= caa2da34fd25a37e9fd43343b6966fb9d730a6d5, < 148d7ec0a3a98839c320e6cdd112e2e88bfb091b; >= caa2da34fd25a37e9fd43343b6966fb9d730a6d5, < 5e023fe2569e630ba23b5558ebe4bf4837af4d16; >= caa2da34fd25a37e9fd43343b6966fb9d730a6d5, < 5df30f05db96552903680a17f858d250dfd9e86e; >= caa2da34fd25a37e9fd43343b6966fb9d730a6d5, < 23d917acd9c9a9fd999688ec3fdde7aa58ab8a14; >= caa2da34fd25a37e9fd43343b6966fb9d730a6d5, < 62e7df6d042aeebd5efb581074e28865c04477be
LinuxLinux5.6

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-72023?
In the Linux kernel, the following vulnerability has been resolved: octeontx2-pf: fix SQB pointer leak on init failure otx2_init_hw_resources() initializes SQ aura and pool resources before several later setup steps. On failure, err_free_sq_ptrs only frees SQB pages, leaving the per-SQ sqb_ptrs arrays behind. Use otx2_free_sq_res() for the SQ unwind path and let it free sqb_ptrs even when sq->sqe has not been allocated yet. The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in v7.1.1. An x86_64 allyesconfig build showed no new warnings. As we do not have an OcteonTX2 PF device and the corresponding AF mailbox setup to test with, no runtime testing was able to be performed.
How severe is CVE-2026-72023?
Severity scoring for CVE-2026-72023 is pending analysis. The EPSS model estimates a 0.20% probability of exploitation in the next 30 days.
How do I fix CVE-2026-72023?
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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Source: NVD / NIST