FKIE_CVE-2026-93219

Vulnerability from fkie_nvd - Published: 2026-09-24 16:17 - Updated: 2026-09-24 16:17
Severity
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0cc4b14d7401d50e53a01f1554147ee075ee6943
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/151eb52f8712017c8f7b00bb2305e8916cb9e3dc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/53a3bc024b8e5d284468cce84957cded5f859f98
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/753a220084dfc4d737f2ab9eaddc9a01a397edd7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bf38be01d43c4e4ca903aff7236d8486a950a252
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d21808328225ab8cee46885bf9a0dffcefbe630e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ebba4d0aeba0e8eb3a9676380fc2652de8ab1c44
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f0efafcdf6eec1f3361bfd8c811420198f55c8bb
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/clocksource/timer-sun4i.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0cc4b14d7401d50e53a01f1554147ee075ee6943",
              "status": "affected",
              "version": "12e1480bcb4920c1b02b3793cb48756497919a60",
              "versionType": "git"
            },
            {
              "lessThan": "53a3bc024b8e5d284468cce84957cded5f859f98",
              "status": "affected",
              "version": "12e1480bcb4920c1b02b3793cb48756497919a60",
              "versionType": "git"
            },
            {
              "lessThan": "753a220084dfc4d737f2ab9eaddc9a01a397edd7",
              "status": "affected",
              "version": "12e1480bcb4920c1b02b3793cb48756497919a60",
              "versionType": "git"
            },
            {
              "lessThan": "ebba4d0aeba0e8eb3a9676380fc2652de8ab1c44",
              "status": "affected",
              "version": "12e1480bcb4920c1b02b3793cb48756497919a60",
              "versionType": "git"
            },
            {
              "lessThan": "151eb52f8712017c8f7b00bb2305e8916cb9e3dc",
              "status": "affected",
              "version": "12e1480bcb4920c1b02b3793cb48756497919a60",
              "versionType": "git"
            },
            {
              "lessThan": "bf38be01d43c4e4ca903aff7236d8486a950a252",
              "status": "affected",
              "version": "12e1480bcb4920c1b02b3793cb48756497919a60",
              "versionType": "git"
            },
            {
              "lessThan": "f0efafcdf6eec1f3361bfd8c811420198f55c8bb",
              "status": "affected",
              "version": "12e1480bcb4920c1b02b3793cb48756497919a60",
              "versionType": "git"
            },
            {
              "lessThan": "d21808328225ab8cee46885bf9a0dffcefbe630e",
              "status": "affected",
              "version": "12e1480bcb4920c1b02b3793cb48756497919a60",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/clocksource/timer-sun4i.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.13"
            },
            {
              "lessThan": "3.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.109",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nclocksource/drivers/timer-sun4i: Advertise a real minimum delta\n\nsun4i_clkevt_next_event() compensates for the timer stop/start\nsynchronization delay by programming evt - TIMER_SYNC_TICKS into the\nhardware interval register. The clockevent device currently advertises\nTIMER_SYNC_TICKS as min_delta_ticks, so the clockevents core is allowed\nto call set_next_event() with evt == TIMER_SYNC_TICKS.\n\nThat programs a zero-tick interval. With oneshot/highres/nohz timer\noperation this can leave the next event stuck, which was observed as a\nboot hang on Allwinner D1 after the clockevents core started reusing\nforced minimum-delta events.\n\nAdvertise one extra tick instead, so the smallest event accepted by the\ncore still programs at least one hardware tick after the synchronization\ncompensation."
    }
  ],
  "id": "CVE-2026-93219",
  "lastModified": "2026-09-24T16:17:17.030",
  "metrics": {},
  "published": "2026-09-24T16:17:17.030",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0cc4b14d7401d50e53a01f1554147ee075ee6943"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/151eb52f8712017c8f7b00bb2305e8916cb9e3dc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/53a3bc024b8e5d284468cce84957cded5f859f98"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/753a220084dfc4d737f2ab9eaddc9a01a397edd7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bf38be01d43c4e4ca903aff7236d8486a950a252"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d21808328225ab8cee46885bf9a0dffcefbe630e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ebba4d0aeba0e8eb3a9676380fc2652de8ab1c44"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f0efafcdf6eec1f3361bfd8c811420198f55c8bb"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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