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CVE-2026-64234— tty: serial: pch_uart: add check for dma_alloc_coherent()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel 2.6.38版本存在安全漏洞，该漏洞源于未检查dma_alloc_coherent()返回值，可能导致空指针取消引用。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.11% · P1

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 3c6a483275f47a2ef7119309ad3d791c10cf30da< 760df81763b391bb5f0dcb0b7597b736da753ae4 affected
3c6a483275f47a2ef7119309ad3d791c10cf30da< 5f2e2a240dc1846e049bc67e9c3cdf5b031d08bf affected
3c6a483275f47a2ef7119309ad3d791c10cf30da< daea997bb244aeb50cbb2e5e075fb446a6cf068f affected
3c6a483275f47a2ef7119309ad3d791c10cf30da< 6dd5c0ea139b586ad5a091677056dafd405cfe82 affected
3c6a483275f47a2ef7119309ad3d791c10cf30da< d846df2dfbc2469a688833b4cc4f8aa80672bde8 affected
3c6a483275f47a2ef7119309ad3d791c10cf30da< 66f8bfea055b23719b4fd6ce207c44de37d82a59 affected
3c6a483275f47a2ef7119309ad3d791c10cf30da< d8d53a343ebe74274ca17b1e1993042e99f8c863 affected
3c6a483275f47a2ef7119309ad3d791c10cf30da< 6fe472c1bbbe238e91141f7cabc1226e96a60d43 affected
… +10 more rows
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I. Basic Information for CVE-2026-64234

Vulnerability Information
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Vulnerability Title
tty: serial: pch_uart: add check for dma_alloc_coherent()
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel 2.6.38版本存在安全漏洞，该漏洞源于未检查dma_alloc_coherent()返回值，可能导致空指针取消引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 3c6a483275f47a2ef7119309ad3d791c10cf30da ~ 760df81763b391bb5f0dcb0b7597b736da753ae4 -
Linux Linux 2.6.38 -

II. Public POCs for CVE-2026-64234

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III. Intelligence Information for CVE-2026-64234

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Patches & Fixes for CVE-2026-64234 (8)

Same Patch Batch · Linux · 2026-07-24 · 48 CVEs total

CVE-2026-64216 9.8 CRITICAL netfs: Fix potential UAF in netfs_unlock_abandoned_read_pages()
CVE-2026-64232 9.8 CRITICAL block: recompute nr_integrity_segments in blk_insert_cloned_request
CVE-2026-64255 8.8 HIGH wifi: iwlwifi: mld: validate sta_mask before ffs() in BA session handlers
CVE-2026-64247 8.4 HIGH KVM: x86: hyper-v: Bound the bank index when querying sparse banks
CVE-2026-64223 8.1 HIGH wifi: mac80211: consume only present negotiated TTLM maps
CVE-2026-64235 8.1 HIGH x86/ftrace: Relocate %rip-relative percpu refs in dynamic trampolines
CVE-2026-64218 7.8 HIGH batman-adv: bla: fix report_work leak on backbone_gw purge
CVE-2026-64226 7.8 HIGH sched_ext: Avoid UAF in scx_root_enable_workfn() init failure path
CVE-2026-64251 7.8 HIGH pwrseq: core: fix use-after-free in pwrseq_debugfs_seq_next()
CVE-2026-64221 7.8 HIGH spi: ti-qspi: fix use-after-free after DMA setup failure
CVE-2026-64217 7.8 HIGH netfs: Fix overrun check in netfs_extract_user_iter()
CVE-2026-64208 7.5 HIGH crypto/krb5, rxrpc: Fix lack of pre-decrypt/pre-verify length checks
CVE-2026-64210 7.5 HIGH net/mlx5e: xsk: Fix unlocked writing to ICOSQ
CVE-2026-64243 7.1 HIGH ASoC: codecs: simple-mux: Fix enum control bounds check
CVE-2026-64219 7.0 HIGH drm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_as
CVE-2026-64222 7.0 HIGH octeontx2-pf: avoid double free of pool->stack on AQ init failure
CVE-2026-64212 wifi: iwlwifi: mld: don't dereference a pointer before NULL checking it
CVE-2026-64213 hwmon: (lm90) Add lock protection to lm90_alert
CVE-2026-64211 srcu: Don't queue workqueue handlers to never-online CPUs
CVE-2026-64225 octeontx2-af: CGX: add bounds check to cgx_speed_mbps index

Showing top 20 of 48 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-64234

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