What is CVE-2026-31677?

CVE-2026-31677 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 4.14 onward and patched in 6.12.83, 6.18.24, 6.19.14 and others. CVE-2026-31677 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-31677?

CVE-2026-31677 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2026-31677?

Yes, CVE-2026-31677 has been patched. Fixed versions include 6.12.83, 6.18.24, 6.19.14 and others. If you are running Linux kernel 4.14 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-31677 actively exploited?

CVE-2026-31677 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-31677

Medium

In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - limit RX SG extraction by receive buffer budget Make af_alg_get_rsgl() limit each RX scatterlist extraction to the remaining receive buffer budget. af_alg_get_rsgl() currently uses af_alg_readable() only as a gate before extracting data into the RX scatterlist. Limit each extraction to the remaining af_alg_rcvbuf(sk) budget so that receive-side accounting matches the amount of data attached to the request. If skcipher cannot obtain enough RX space for at least one chunk while more data remains to be processed, reject the recvmsg call instead of rounding the request length down to zero.

Package Linux Kernel

Published 2026-04-25

Last modified 2026-05-06

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Affected versions

Linux kernel versions 4.14 and later are affected. Fixed in 6.12.83, 6.18.24, 6.19.14, 7.0 and their respective stable series.

Affected from

≥ 4.14

Fixed in

✓ 6.12.83 6.12.x ✓ 6.18.24 6.18.x ✓ 6.19.14 6.19.x ✓ 7.0

References

The following references provide additional information about CVE-2026-31677 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/07c6f6ffe29009426f0bd4d3cfbb6308b8ea8453
Patch
Kernel patch commit
https://git.kernel.org/stable/c/4a264b2614c73c96666e196bbabe0cead52bdba7
Patch
Kernel patch commit
https://git.kernel.org/stable/c/8eceab19eba9dcbfd2a0daec72e1bf48aa100170
Patch

4 patch commits total View all on NVD

Details

CVE ID CVE-2026-31677

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-04-25

Modified 2026-05-06

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-31677?

CVE-2026-31677 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 4.14 onward and has been patched in 6.12.83, 6.18.24, 6.19.14 and others. CVE-2026-31677 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-31677?

CVE-2026-31677 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2026-31677?

Yes — CVE-2026-31677 has been patched. Fixed versions include 6.12.83, 6.18.24, 6.19.14 and others. If you are running Linux kernel 4.14 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-31677 actively exploited?

No — CVE-2026-31677 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.