Unknown

CVE-2026-93219 — clocksource/drivers/timer-sun4i: Advertise a real minimum delta

In the Linux kernel, the following vulnerability has been resolved: clocksource/drivers/timer-sun4i: Advertise a real minimum delta sun4i_clkevt_next_event() compensates for the timer stop/start synchronization delay by programming evt - TIMER_SYNC_TICKS into the hardware interval register. The clockevent device currently advertises TIMER_SYNC_TICKS as min_delta_ticks, so the clockevents core is allowed to call set_next_event() with evt == TIMER_SYNC_TICKS. That programs a zero-tick interval. With oneshot/highres/nohz timer operation this can leave the next event stuck, which was observed as a boot hang on Allwinner D1 after the clockevents core started reusing forced minimum-delta events. Advertise one extra tick instead, so the smallest event accepted by the core still programs at least one hardware tick after the synchronization compensation.

Published Sep 24, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+1

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.18%

ahead of 7% of scored CVEs · Oct 16, 2026

Affects

Linux

CVSS base

—

Score not published yet.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ 12e1480bcb4920c1b02b3793cb48756497919a60 and < 0cc4b14d7401d50e53a01f1554147ee075ee6943≥ 12e1480bcb4920c1b02b3793cb48756497919a60 and < 53a3bc024b8e5d284468cce84957cded5f859f98≥ 12e1480bcb4920c1b02b3793cb48756497919a60 and < 753a220084dfc4d737f2ab9eaddc9a01a397edd7≥ 12e1480bcb4920c1b02b3793cb48756497919a60 and < ebba4d0aeba0e8eb3a9676380fc2652de8ab1c44≥ 12e1480bcb4920c1b02b3793cb48756497919a60 and < 151eb52f8712017c8f7b00bb2305e8916cb9e3dc≥ 12e1480bcb4920c1b02b3793cb48756497919a60 and < bf38be01d43c4e4ca903aff7236d8486a950a252≥ 12e1480bcb4920c1b02b3793cb48756497919a60 and < f0efafcdf6eec1f3361bfd8c811420198f55c8bb≥ 12e1480bcb4920c1b02b3793cb48756497919a60 and < d21808328225ab8cee46885bf9a0dffcefbe630e and 1 more version 3.13	Vulnerable	CVE Program (cve.org) e CISA ADP

EPSS over time FIRST

Oct 15, 2026 → Oct 16, 2026 · 2 reading(s) · max 0.18%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Not enough vector or weakness data: use the affected application’s logs as a starting point.

application logs

Timeline

What happened to this CVE, newest first.

2026
Record published
Oct 15, 2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Received
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Sep 24, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

8 on the record

git.kernel.org/stable/c/f0efafcdf6eec1f3361bfd8c811420198f55c8bb
NIST National Vulnerability Database
git.kernel.org/stable/c/ebba4d0aeba0e8eb3a9676380fc2652de8ab1c44
NIST National Vulnerability Database
git.kernel.org/stable/c/753a220084dfc4d737f2ab9eaddc9a01a397edd7
NIST National Vulnerability Database
git.kernel.org/stable/c/53a3bc024b8e5d284468cce84957cded5f859f98
NIST National Vulnerability Database
git.kernel.org/stable/c/d21808328225ab8cee46885bf9a0dffcefbe630e
NIST National Vulnerability Database
git.kernel.org/stable/c/bf38be01d43c4e4ca903aff7236d8486a950a252
NIST National Vulnerability Database
git.kernel.org/stable/c/151eb52f8712017c8f7b00bb2305e8916cb9e3dc
NIST National Vulnerability Database
git.kernel.org/stable/c/0cc4b14d7401d50e53a01f1554147ee075ee6943
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 2d
Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 2d
Unknown CVE-2026-98424 wifi: cfg80211: undo netns switch if renaming the wiphy fails 3d
Unknown CVE-2026-98425 wifi: mac80211: don't warn when an IBSS has no channel to scan 3d
Unknown CVE-2026-98426 wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path 3d
Unknown CVE-2026-98427 net/sched: codel: bound the dropping loop per dequeue call 3d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No CVSS score published by NVD, the CNA, CISA or GitHub so far.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-93219 is "clocksource/drivers/timer-sun4i: Advertise a real minimum delta", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.18% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

Comments

Moderated technical discussion. Read the community guidelines.

No comments yet.