What is CVE-2026-64124?

CVE-2026-64124 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10, affecting Linux kernel versions from 6.16 onward and patched in 6.18.35, 7.0.11 and 7.1. CVE-2026-64124 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-64124?

CVE-2026-64124 has a CVSS score of 8.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Is there a patch available for CVE-2026-64124?

Yes, CVE-2026-64124 has been patched. Fixed versions include 6.18.35, 7.0.11 and 7.1. If you are running Linux kernel 6.16 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-64124 actively exploited?

CVE-2026-64124 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-64124

High

In the Linux kernel, the following vulnerability has been resolved: net: devmem: reject dma-buf bind with non-page-aligned size or SG length net_devmem_bind_dmabuf() trusts dmabuf->size and sg_dma_len() to be PAGE_SIZE multiples without checking: - tx_vec is sized dmabuf->size / PAGE_SIZE, and net_devmem_get_niov_at() only bounds-checks virt_addr < dmabuf->size before indexing tx_vec[virt_addr / PAGE_SIZE]. With size = N*PAGE_SIZE + r (1 <= r < PAGE_SIZE), sendmsg() at iov_base = N*PAGE_SIZE passes the bound check and reads tx_vec[N] -- one past. - owner->area.num_niovs = len / PAGE_SIZE while gen_pool_add_owner() covers the full byte len, so a non-page-multiple non-final sg desyncs num_niovs from the gen_pool region for every later sg, on both RX and TX. dma-buf does not require page-aligned sizes, so the bind path has to enforce what its own indexing assumes. Reject both with -EINVAL. The size check is TX-only (only tx_vec is sized off dmabuf->size); the SG-length check covers both directions.

Package Linux Kernel

Published 2026-07-19

Last modified 2026-08-13

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

8.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Affected versions

Linux kernel versions 6.16 and later are affected. Fixed in 6.18.35, 7.0.11, 7.1 and their respective stable series.

Affected from

≥ 6.16

Fixed in

✓ 6.18.35 6.18.x ✓ 7.0.11 7.0.x ✓ 7.1

References

3 total

Kernel Git
https://git.kernel.org/stable/c/134c517dfa63203287b2aad6558017f42435a02e

Patch
Kernel Git
https://git.kernel.org/stable/c/4eb82ba543421e9e38cc14e4e82058b78850df50

Patch
Kernel Git
https://git.kernel.org/stable/c/d5008e4e4ee6b739256b796702a7d1aae1b5c3b4

Patch

Details

CVE ID CVE-2026-64124

Severity High

CVSS score 8.8 / 10

CVSS version 3.1

Published 2026-07-19

Modified 2026-08-13

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-64124?

CVE-2026-64124 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10 . It affects Linux kernel versions from 6.16 onward and has been patched in 6.18.35, 7.0.11 and 7.1. CVE-2026-64124 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-64124?

CVE-2026-64124 has a CVSS score of 8.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
Is there a patch available for CVE-2026-64124?

Yes. CVE-2026-64124 has been patched. Fixed versions include 6.18.35, 7.0.11 and 7.1. If you are running Linux kernel 6.16 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-64124 actively exploited?

No. CVE-2026-64124 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.