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CVE-2026-53055

Linux Kernel use-after-free

9.8 CRITICALEPSS 0.63%
  1. Published24 Jun 2026

Description

In the Linux kernel, the following vulnerability has been resolved: crypto: hisilicon/sec2 - prevent req used-after-free for sec During packet transmission, if the system is under heavy load, the hardware might complete processing the packet and free the request memory (req) before the transmission function finishes. If the software subsequently accesses this req, a use-after-free error will occur. The qp_ctx memory exists throughout the packet sending process, so replace the req with the qp_ctx.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Linux Kernel≥ 6.17 < 6.18.33 · ≥ 6.19 < 7.0.10

Remediation

Fixed in
Linux Kernel≥ 6.18.33

References

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Frequently asked

Is CVE-2026-53055 being actively exploited?

CVE-2026-53055 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.63%.

How severe is CVE-2026-53055?

CVE-2026-53055 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.63% probability of exploitation.

Which products are affected by CVE-2026-53055?

Affected products include Linux Kernel.

How do I fix CVE-2026-53055?

Upgrade affected software to a fixed version, for example Linux Kernel 6.18.33 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.