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NVD / CVE Program· CNA Linux

CVE-2026-64528: tty: serial: samsung: Remove redundant port lock acquisition in rx helpers

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.16% (FIRST EPSS).
  • Fixed version: Linux Linux 10014eb7eee351f7b587f8ac85830f0c9343cb9a, 14143ec10d69f42806b5d7b046f0fd1b835831ae, 9c92b42207978559e32903c3098aaf5c5b5788b2.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 10014eb7eee351f7b587f8ac85830f0c9343cb9a, 14143ec10d69f42806b5d7b046f0fd1b835831ae, 9c92b42207978559e32903c3098aaf5c5b5788b2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: tty: serial: samsung: Remove redundant port lock acquisition in rx helpers Sashiko identified a deadlock when the console flow is engaged [1]. When console flow control is enabled (UPF_CONS_FLOW), s3c24xx_serial_stop_tx() calls s3c24xx_serial_rx_enable() and s3c24xx_serial_start_tx() calls s3c24xx_serial_rx_disable(). The serial core framework invokes the .stop_tx() and .start_tx() callbacks with the port->lock spinlock already held. Furthermore, all internal driver paths that invoke stop_tx (such as the DMA TX completion handler s3c24xx_serial_tx_dma_complete() or the PIO TX IRQ handler s3c24xx_serial_tx_irq()) also acquire port->lock prior to calling it. (Note that s3c24xx_serial_start_tx() is only invoked by the serial core). However, s3c24xx_serial_rx_enable() and s3c24xx_serial_rx_disable() unconditionally attempt to acquire port->lock again using uart_port_lock_irqsave(). Since spinlocks are not recursive, this causes a deadlock on the same CPU when console flow control is engaged. Remove the redundant lock acquisition from both rx helper functions.

—No exploit Fix available
Published
Jul 25, 2026
Updated
Nov 3, 2026
EPSS
0.1% · 6th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 2.6.27affected
    • b497549a035c2a81b71c7a27f2b00c8a16c09423 and later · before ee9eb72be95490602c493db050c73d925c3a4d74affected · git
    • b497549a035c2a81b71c7a27f2b00c8a16c09423 and later · before 10014eb7eee351f7b587f8ac85830f0c9343cb9aaffected · git
    • b497549a035c2a81b71c7a27f2b00c8a16c09423 and later · before f4c3e63fa8639aedf96fb200d9939945a9eed51eaffected · git
    • b497549a035c2a81b71c7a27f2b00c8a16c09423 and later · before a9c22e0f93ba18322a6623ecdda2f0cd858ca350affected · git
    • b497549a035c2a81b71c7a27f2b00c8a16c09423 and later · before 14143ec10d69f42806b5d7b046f0fd1b835831aeaffected · git
    • b497549a035c2a81b71c7a27f2b00c8a16c09423 and later · before 9fd48937046efc9abb89379d63ee9cc5c661d711affected · git
    • b497549a035c2a81b71c7a27f2b00c8a16c09423 and later · before 9c92b42207978559e32903c3098aaf5c5b5788b2affected · git
    • b497549a035c2a81b71c7a27f2b00c8a16c09423 and later · before a3bb136bff5e6a5e48cdd813246c9c4686feaaa9affected · git
    • before 2.6.27not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.176-16.1.176-1
Debian:13linuxbefore 6.12.94-16.12.94-1
Debian:14linuxbefore 7.0.12-17.0.12-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-64526Jul 25, 2026 · ethtool: tsconfig: fix missing ethnl_ops_complete()
    0Monitor
  • ← EarlierCVE-2026-64527Jul 25, 2026 · drm/hyperv: validate VMBus packet size in receive callback
    0Monitor
  • Later →CVE-2026-64529Jul 25, 2026 · crypto: qat - remove unused character device and IOCTLs
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux10014eb7eee351f7b587f8ac85830f0c9343cb9aVendor (CNA)
Linux Linux14143ec10d69f42806b5d7b046f0fd1b835831aeVendor (CNA)
Linux Linux9c92b42207978559e32903c3098aaf5c5b5788b2Vendor (CNA)
Linux Linux9fd48937046efc9abb89379d63ee9cc5c661d711Vendor (CNA)
Linux Linuxa3bb136bff5e6a5e48cdd813246c9c4686feaaa9Vendor (CNA)
Linux Linuxa9c22e0f93ba18322a6623ecdda2f0cd858ca350Vendor (CNA)
Linux Linuxee9eb72be95490602c493db050c73d925c3a4d74Vendor (CNA)
Linux Linuxf4c3e63fa8639aedf96fb200d9939945a9eed51eVendor (CNA)
debian:linux6.1.176-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

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No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records