What is CVE-2026-74611?

CVE-2026-74611 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10, affecting Linux kernel versions from 6.0 onward and patched in 6.18.45, 7.1.9 and 7.2. CVE-2026-74611 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-74611?

CVE-2026-74611 has a CVSS score of 9.8 out of 10, rated Critical severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-74611?

Yes, CVE-2026-74611 has been patched. Fixed versions include 6.18.45, 7.1.9 and 7.2. If you are running Linux kernel 6.0 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-74611 actively exploited?

CVE-2026-74611 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-74611

Critical

In the Linux kernel, the following vulnerability has been resolved: tls: rx: restore msg_iter before TLS 1.3 optimistic retry tls_decrypt_sg() advances msg->msg_iter when it maps user pages for the optimistic TLS 1.3 zero-copy path. If the decrypted record turns out not to be unpadded application data, tls_decrypt_sw() retries into a kernel skb, but leaves the iterator advanced. The subsequent copy from the skb then writes decrypted bytes again at a later point in the caller iovecs while recvmsg() reports only the post-retry length. A TLS peer can trigger this after the receiver enables TLS_RX_EXPECT_NO_PAD. Revert the iterator by the number of bytes consumed by the optimistic mapping before retrying without zero-copy. Add a selftest which sends a TLS 1.3 control record with TLS_RX_EXPECT_NO_PAD enabled and verifies that recvmsg() does not overwrite later iovecs beyond the returned length.

Package Linux Kernel

Published 2026-08-22

Last modified 2026-08-25

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

9.8

out of 10

Critical

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Affected versions

Linux kernel versions 6.0 and later are affected. Fixed in 6.18.45, 7.1.9, 7.2 and their respective stable series.

Affected from

≥ 6.0

Fixed in

✓ 6.18.45 6.18.x ✓ 7.1.9 7.1.x ✓ 7.2

References

3 total

Details

CVE ID CVE-2026-74611

Severity Critical

CVSS score 9.8 / 10

CVSS version 3.1

Published 2026-08-22

Modified 2026-08-25

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-74611?

CVE-2026-74611 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10 . It affects Linux kernel versions from 6.0 onward and has been patched in 6.18.45, 7.1.9 and 7.2. CVE-2026-74611 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-74611?

CVE-2026-74611 has a CVSS score of 9.8 out of 10, rated Critical severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-74611?

Yes. CVE-2026-74611 has been patched. Fixed versions include 6.18.45, 7.1.9 and 7.2. If you are running Linux kernel 6.0 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-74611 actively exploited?

No. CVE-2026-74611 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.