CVE-2026-31677

kernel: crypto: af_alg - limit RX SG extraction by receive buffer budget

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · April 25, 2026

Updated · June 28, 2026

Description

A flaw was found in the Linux kernel's af_alg (Algorithm Interface) component. This vulnerability allows a local attacker to cause a denial of service (DoS) by sending specially crafted requests. The af_alg_get_rsgl() function fails to properly limit the extraction of receive scatterlist (RX SG) data based on the available receive buffer, leading to the rejection of recvmsg calls and preventing further data processing.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-770 · Allocation of Resources Without Limits or Throttling