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clocksource/drivers/timer-sun4i: Advertise a real minimum delta

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-93219

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-93219

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "12e1480bcb4920c1b02b3793cb48756497919a60",
        "lessThan": "0cc4b14d7401d50e53a01f1554147ee075ee6943",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "12e1480bcb4920c1b02b3793cb48756497919a60",
        "lessThan": "53a3bc024b8e5d284468cce84957cded5f859f98",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "12e1480bcb4920c1b02b3793cb48756497919a60",
        "lessThan": "753a220084dfc4d737f2ab9eaddc9a01a397edd7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "12e1480bcb4920c1b02b3793cb48756497919a60",
        "lessThan": "ebba4d0aeba0e8eb3a9676380fc2652de8ab1c44",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "12e1480bcb4920c1b02b3793cb48756497919a60",
        "lessThan": "151eb52f8712017c8f7b00bb2305e8916cb9e3dc",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "12e1480bcb4920c1b02b3793cb48756497919a60",
        "lessThan": "bf38be01d43c4e4ca903aff7236d8486a950a252",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "12e1480bcb4920c1b02b3793cb48756497919a60",
        "lessThan": "f0efafcdf6eec1f3361bfd8c811420198f55c8bb",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "12e1480bcb4920c1b02b3793cb48756497919a60",
        "lessThan": "d21808328225ab8cee46885bf9a0dffcefbe630e",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/clocksource/timer-sun4i.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.13"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.13",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.270",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.109",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.50",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.4",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/clocksource/timer-sun4i.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-93219

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#37921 · Revision 1
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Publisher date
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