CVE-2026-64234
tty: serial: pch_uart: add check for dma_alloc_coherent()
Description
In the Linux kernel, the following vulnerability has been resolved: tty: serial: pch_uart: add check for dma_alloc_coherent() Add a check for dma_alloc_coherent() failure to prevent a potential NULL pointer dereference in dma_handle_rx(). Properly release DMA channels and the PCI device reference using a goto ladder if the allocation fails.
INFO
Published Date :
July 24, 2026, 4:16 p.m.
Last Modified :
Aug. 12, 2026, 7:13 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Check DMA allocation success before dereferencing.
- Release DMA channels on allocation failure.
- Release PCI device reference on allocation failure.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-64234.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64234 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-64234
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-64234 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64234 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Aug. 12, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-476 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.176 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.35 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.143 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.93 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.210 *cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.12 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 2.6.38 up to (excluding) 5.10.259 Added Reference Type kernel.org: https://git.kernel.org/stable/c/5f2e2a240dc1846e049bc67e9c3cdf5b031d08bf Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/66f8bfea055b23719b4fd6ce207c44de37d82a59 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/6dd5c0ea139b586ad5a091677056dafd405cfe82 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/6fe472c1bbbe238e91141f7cabc1226e96a60d43 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/760df81763b391bb5f0dcb0b7597b736da753ae4 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/d846df2dfbc2469a688833b4cc4f8aa80672bde8 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/d8d53a343ebe74274ca17b1e1993042e99f8c863 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/daea997bb244aeb50cbb2e5e075fb446a6cf068f Types: Patch -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 24, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3c6a483275f47a2ef7119309ad3d791c10cf30da', 'lessThan': '760df81763b391bb5f0dcb0b7597b736da753ae4', 'versionType': 'git'}, {'status': 'affected', 'version': '3c6a483275f47a2ef7119309ad3d791c10cf30da', 'lessThan': '5f2e2a240dc1846e049bc67e9c3cdf5b031d08bf', 'versionType': 'git'}, {'status': 'affected', 'version': '3c6a483275f47a2ef7119309ad3d791c10cf30da', 'lessThan': 'daea997bb244aeb50cbb2e5e075fb446a6cf068f', 'versionType': 'git'}, {'status': 'affected', 'version': '3c6a483275f47a2ef7119309ad3d791c10cf30da', 'lessThan': '6dd5c0ea139b586ad5a091677056dafd405cfe82', 'versionType': 'git'}, {'status': 'affected', 'version': '3c6a483275f47a2ef7119309ad3d791c10cf30da', 'lessThan': 'd846df2dfbc2469a688833b4cc4f8aa80672bde8', 'versionType': 'git'}, {'status': 'affected', 'version': '3c6a483275f47a2ef7119309ad3d791c10cf30da', 'lessThan': '66f8bfea055b23719b4fd6ce207c44de37d82a59', 'versionType': 'git'}, {'status': 'affected', 'version': '3c6a483275f47a2ef7119309ad3d791c10cf30da', 'lessThan': 'd8d53a343ebe74274ca17b1e1993042e99f8c863', 'versionType': 'git'}, {'status': 'affected', 'version': '3c6a483275f47a2ef7119309ad3d791c10cf30da', 'lessThan': '6fe472c1bbbe238e91141f7cabc1226e96a60d43', 'versionType': 'git'}], 'programFiles': ['drivers/tty/serial/pch_uart.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.38'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.38', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.259', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.210', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.176', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.143', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.93', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.35', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.12', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/tty/serial/pch_uart.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: tty: serial: pch_uart: add check for dma_alloc_coherent() Add a check for dma_alloc_coherent() failure to prevent a potential NULL pointer dereference in dma_handle_rx(). Properly release DMA channels and the PCI device reference using a goto ladder if the allocation fails. Added Reference https://git.kernel.org/stable/c/5f2e2a240dc1846e049bc67e9c3cdf5b031d08bf Added Reference https://git.kernel.org/stable/c/66f8bfea055b23719b4fd6ce207c44de37d82a59 Added Reference https://git.kernel.org/stable/c/6dd5c0ea139b586ad5a091677056dafd405cfe82 Added Reference https://git.kernel.org/stable/c/6fe472c1bbbe238e91141f7cabc1226e96a60d43 Added Reference https://git.kernel.org/stable/c/760df81763b391bb5f0dcb0b7597b736da753ae4 Added Reference https://git.kernel.org/stable/c/d846df2dfbc2469a688833b4cc4f8aa80672bde8 Added Reference https://git.kernel.org/stable/c/d8d53a343ebe74274ca17b1e1993042e99f8c863 Added Reference https://git.kernel.org/stable/c/daea997bb244aeb50cbb2e5e075fb446a6cf068f