Vulnerability-Lookup

CVE-2026-80886 (GCVE-0-2026-80886)

Vulnerability from cvelistv5 – Published: 2026-09-04 16:49 – Updated: 2026-09-04 16:49

Title

serial: msm: Disable DMA for kernel console UART

Summary

In the Linux kernel, the following vulnerability has been resolved: serial: msm: Disable DMA for kernel console UART At the moment, concurrent writes from userspace and the kernel to the console can trigger a race condition that results in an infinite loop of the same messages printed over and over again. This is most likely to happen during system startup or shutdown when the init system starts/stops a large number of system services that interact with various kernel code. When userspace writes to the TTY device, the driver initiates an asynchronous DMA transfer and releases the port lock. At the same moment, the kernel printk path might grab the port lock and re-configure the UART controller for PIO, without waiting for the DMA operation to complete. It seems like this collision results in zero progress being reported for the DMA engine, so the same text is printed to the console over and over again. For the kernel console, we want a reliable output path that will be functional even during crashes etc. So rather than implementing complex code to synchronize the kernel console write routines with the userspace DMA write routines, simply disable DMA for the console UART instance. Similar checks exist in many other serial drivers, e.g. 8250_port.c, imx.c, sh-sci.c etc.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/f58e568dc308c8e13…
https://git.kernel.org/stable/c/bb4296de5b538b575…
https://git.kernel.org/stable/c/6acea62738ed4cae6…
https://git.kernel.org/stable/c/abc1926c88c189e5d…
https://git.kernel.org/stable/c/2727744ccb5ca5909…
https://git.kernel.org/stable/c/d354716245192de2d…
https://git.kernel.org/stable/c/e3b42e326f4f30efc…
https://git.kernel.org/stable/c/22dd2777e6c180e1c…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: 3a878c430fd6eb4f8587f9ebd187f773bf85d1d6 , < f58e568dc308c8e13f7730c8de2da5ed514e540d (git) Affected: 3a878c430fd6eb4f8587f9ebd187f773bf85d1d6 , < bb4296de5b538b575978c588cb3738ab8524d01a (git) Affected: 3a878c430fd6eb4f8587f9ebd187f773bf85d1d6 , < 6acea62738ed4cae6746483026706a773b44dad7 (git) Affected: 3a878c430fd6eb4f8587f9ebd187f773bf85d1d6 , < abc1926c88c189e5d698b91ed6890e09ab5c321d (git) Affected: 3a878c430fd6eb4f8587f9ebd187f773bf85d1d6 , < 2727744ccb5ca59090451451ee94f530b1be04a5 (git) Affected: 3a878c430fd6eb4f8587f9ebd187f773bf85d1d6 , < d354716245192de2d203f2b35f22ab8dc13595e2 (git) Affected: 3a878c430fd6eb4f8587f9ebd187f773bf85d1d6 , < e3b42e326f4f30efcdc90bad5f5ba37e1cd91a47 (git) Affected: 3a878c430fd6eb4f8587f9ebd187f773bf85d1d6 , < 22dd2777e6c180e1c945b00f6d18550979436324 (git)	guessed
Linux	Linux	Affected: 4.4 Unaffected: 0 , < 4.4 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/tty/serial/msm_serial.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f58e568dc308c8e13f7730c8de2da5ed514e540d",
              "status": "affected",
              "version": "3a878c430fd6eb4f8587f9ebd187f773bf85d1d6",
              "versionType": "git"
            },
            {
              "lessThan": "bb4296de5b538b575978c588cb3738ab8524d01a",
              "status": "affected",
              "version": "3a878c430fd6eb4f8587f9ebd187f773bf85d1d6",
              "versionType": "git"
            },
            {
              "lessThan": "6acea62738ed4cae6746483026706a773b44dad7",
              "status": "affected",
              "version": "3a878c430fd6eb4f8587f9ebd187f773bf85d1d6",
              "versionType": "git"
            },
            {
              "lessThan": "abc1926c88c189e5d698b91ed6890e09ab5c321d",
              "status": "affected",
              "version": "3a878c430fd6eb4f8587f9ebd187f773bf85d1d6",
              "versionType": "git"
            },
            {
              "lessThan": "2727744ccb5ca59090451451ee94f530b1be04a5",
              "status": "affected",
              "version": "3a878c430fd6eb4f8587f9ebd187f773bf85d1d6",
              "versionType": "git"
            },
            {
              "lessThan": "d354716245192de2d203f2b35f22ab8dc13595e2",
              "status": "affected",
              "version": "3a878c430fd6eb4f8587f9ebd187f773bf85d1d6",
              "versionType": "git"
            },
            {
              "lessThan": "e3b42e326f4f30efcdc90bad5f5ba37e1cd91a47",
              "status": "affected",
              "version": "3a878c430fd6eb4f8587f9ebd187f773bf85d1d6",
              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/tty/serial/msm_serial.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.4"
            },
            {
              "lessThan": "4.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.261",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.212",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.178",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.145",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.97",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.40",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: msm: Disable DMA for kernel console UART\n\nAt the moment, concurrent writes from userspace and the kernel to the\nconsole can trigger a race condition that results in an infinite loop of\nthe same messages printed over and over again. This is most likely to\nhappen during system startup or shutdown when the init system starts/stops\na large number of system services that interact with various kernel code.\n\nWhen userspace writes to the TTY device, the driver initiates an\nasynchronous DMA transfer and releases the port lock. At the same moment,\nthe kernel printk path might grab the port lock and re-configure the UART\ncontroller for PIO, without waiting for the DMA operation to complete. It\nseems like this collision results in zero progress being reported for the\nDMA engine, so the same text is printed to the console over and over again.\n\nFor the kernel console, we want a reliable output path that will be\nfunctional even during crashes etc. So rather than implementing complex\ncode to synchronize the kernel console write routines with the userspace\nDMA write routines, simply disable DMA for the console UART instance.\n\nSimilar checks exist in many other serial drivers, e.g. 8250_port.c,\nimx.c, sh-sci.c etc."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-04T16:49:35.864Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f58e568dc308c8e13f7730c8de2da5ed514e540d"
        },
        {
          "url": "https://git.kernel.org/stable/c/bb4296de5b538b575978c588cb3738ab8524d01a"
        },
        {
          "url": "https://git.kernel.org/stable/c/6acea62738ed4cae6746483026706a773b44dad7"
        },
        {
          "url": "https://git.kernel.org/stable/c/abc1926c88c189e5d698b91ed6890e09ab5c321d"
        },
        {
          "url": "https://git.kernel.org/stable/c/2727744ccb5ca59090451451ee94f530b1be04a5"
        },
        {
          "url": "https://git.kernel.org/stable/c/d354716245192de2d203f2b35f22ab8dc13595e2"
        },
        {
          "url": "https://git.kernel.org/stable/c/e3b42e326f4f30efcdc90bad5f5ba37e1cd91a47"
        },
        {
          "url": "https://git.kernel.org/stable/c/22dd2777e6c180e1c945b00f6d18550979436324"
        }
      ],
      "title": "serial: msm: Disable DMA for kernel console UART",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80886",
    "datePublished": "2026-09-04T16:49:35.864Z",
    "dateReserved": "2026-08-26T14:34:25.799Z",
    "dateUpdated": "2026-09-04T16:49:35.864Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-80886\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-09-04T17:17:01.310\",\"lastModified\":\"2026-09-04T17:17:01.310\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nserial: msm: Disable DMA for kernel console UART\\n\\nAt the moment, concurrent writes from userspace and the kernel to the\\nconsole can trigger a race condition that results in an infinite loop of\\nthe same messages printed over and over again. This is most likely to\\nhappen during system startup or shutdown when the init system starts/stops\\na large number of system services that interact with various kernel code.\\n\\nWhen userspace writes to the TTY device, the driver initiates an\\nasynchronous DMA transfer and releases the port lock. At the same moment,\\nthe kernel printk path might grab the port lock and re-configure the UART\\ncontroller for PIO, without waiting for the DMA operation to complete. It\\nseems like this collision results in zero progress being reported for the\\nDMA engine, so the same text is printed to the console over and over again.\\n\\nFor the kernel console, we want a reliable output path that will be\\nfunctional even during crashes etc. So rather than implementing complex\\ncode to synchronize the kernel console write routines with the userspace\\nDMA write routines, simply disable DMA for the console UART instance.\\n\\nSimilar checks exist in many other serial drivers, e.g. 8250_port.c,\\nimx.c, sh-sci.c etc.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/tty/serial/msm_serial.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3a878c430fd6eb4f8587f9ebd187f773bf85d1d6\",\"lessThan\":\"f58e568dc308c8e13f7730c8de2da5ed514e540d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3a878c430fd6eb4f8587f9ebd187f773bf85d1d6\",\"lessThan\":\"bb4296de5b538b575978c588cb3738ab8524d01a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3a878c430fd6eb4f8587f9ebd187f773bf85d1d6\",\"lessThan\":\"6acea62738ed4cae6746483026706a773b44dad7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3a878c430fd6eb4f8587f9ebd187f773bf85d1d6\",\"lessThan\":\"abc1926c88c189e5d698b91ed6890e09ab5c321d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3a878c430fd6eb4f8587f9ebd187f773bf85d1d6\",\"lessThan\":\"2727744ccb5ca59090451451ee94f530b1be04a5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3a878c430fd6eb4f8587f9ebd187f773bf85d1d6\",\"lessThan\":\"d354716245192de2d203f2b35f22ab8dc13595e2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3a878c430fd6eb4f8587f9ebd187f773bf85d1d6\",\"lessThan\":\"e3b42e326f4f30efcdc90bad5f5ba37e1cd91a47\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3a878c430fd6eb4f8587f9ebd187f773bf85d1d6\",\"lessThan\":\"22dd2777e6c180e1c945b00f6d18550979436324\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/tty/serial/msm_serial.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.4\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.4\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.97\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.40\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.5\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/22dd2777e6c180e1c945b00f6d18550979436324\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2727744ccb5ca59090451451ee94f530b1be04a5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6acea62738ed4cae6746483026706a773b44dad7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/abc1926c88c189e5d698b91ed6890e09ab5c321d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bb4296de5b538b575978c588cb3738ab8524d01a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d354716245192de2d203f2b35f22ab8dc13595e2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e3b42e326f4f30efcdc90bad5f5ba37e1cd91a47\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f58e568dc308c8e13f7730c8de2da5ed514e540d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-09-05T00:25:16Z",
      "cve": "CVE-2026-80886",
      "id": "CVE-2026-80886",
      "initial_release_date": "2026-09-05T00:25:16Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-80886",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-80886.json",
      "version": "2"
    }
  }
}

FKIE_CVE-2026-80886

Vulnerability from fkie_nvd - Published: 2026-09-04 17:17 - Updated: 2026-09-04 17:17

Severity

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/22dd2777e6c180e1c945b00f6d18550979436324
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2727744ccb5ca59090451451ee94f530b1be04a5
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6acea62738ed4cae6746483026706a773b44dad7
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/abc1926c88c189e5d698b91ed6890e09ab5c321d
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/bb4296de5b538b575978c588cb3738ab8524d01a
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d354716245192de2d203f2b35f22ab8dc13595e2
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e3b42e326f4f30efcdc90bad5f5ba37e1cd91a47
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f58e568dc308c8e13f7730c8de2da5ed514e540d

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/tty/serial/msm_serial.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f58e568dc308c8e13f7730c8de2da5ed514e540d",
              "status": "affected",
              "version": "3a878c430fd6eb4f8587f9ebd187f773bf85d1d6",
              "versionType": "git"
            },
            {
              "lessThan": "bb4296de5b538b575978c588cb3738ab8524d01a",
              "status": "affected",
              "version": "3a878c430fd6eb4f8587f9ebd187f773bf85d1d6",
              "versionType": "git"
            },
            {
              "lessThan": "6acea62738ed4cae6746483026706a773b44dad7",
              "status": "affected",
              "version": "3a878c430fd6eb4f8587f9ebd187f773bf85d1d6",
              "versionType": "git"
            },
            {
              "lessThan": "abc1926c88c189e5d698b91ed6890e09ab5c321d",
              "status": "affected",
              "version": "3a878c430fd6eb4f8587f9ebd187f773bf85d1d6",
              "versionType": "git"
            },
            {
              "lessThan": "2727744ccb5ca59090451451ee94f530b1be04a5",
              "status": "affected",
              "version": "3a878c430fd6eb4f8587f9ebd187f773bf85d1d6",
              "versionType": "git"
            },
            {
              "lessThan": "d354716245192de2d203f2b35f22ab8dc13595e2",
              "status": "affected",
              "version": "3a878c430fd6eb4f8587f9ebd187f773bf85d1d6",
              "versionType": "git"
            },
            {
              "lessThan": "e3b42e326f4f30efcdc90bad5f5ba37e1cd91a47",
              "status": "affected",
              "version": "3a878c430fd6eb4f8587f9ebd187f773bf85d1d6",
              "versionType": "git"
            },
            {
              "lessThan": "22dd2777e6c180e1c945b00f6d18550979436324",
              "status": "affected",
              "version": "3a878c430fd6eb4f8587f9ebd187f773bf85d1d6",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/tty/serial/msm_serial.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.4"
            },
            {
              "lessThan": "4.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "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\nserial: msm: Disable DMA for kernel console UART\n\nAt the moment, concurrent writes from userspace and the kernel to the\nconsole can trigger a race condition that results in an infinite loop of\nthe same messages printed over and over again. This is most likely to\nhappen during system startup or shutdown when the init system starts/stops\na large number of system services that interact with various kernel code.\n\nWhen userspace writes to the TTY device, the driver initiates an\nasynchronous DMA transfer and releases the port lock. At the same moment,\nthe kernel printk path might grab the port lock and re-configure the UART\ncontroller for PIO, without waiting for the DMA operation to complete. It\nseems like this collision results in zero progress being reported for the\nDMA engine, so the same text is printed to the console over and over again.\n\nFor the kernel console, we want a reliable output path that will be\nfunctional even during crashes etc. So rather than implementing complex\ncode to synchronize the kernel console write routines with the userspace\nDMA write routines, simply disable DMA for the console UART instance.\n\nSimilar checks exist in many other serial drivers, e.g. 8250_port.c,\nimx.c, sh-sci.c etc."
    }
  ],
  "id": "CVE-2026-80886",
  "lastModified": "2026-09-04T17:17:01.310",
  "metrics": {},
  "published": "2026-09-04T17:17:01.310",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/22dd2777e6c180e1c945b00f6d18550979436324"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2727744ccb5ca59090451451ee94f530b1be04a5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6acea62738ed4cae6746483026706a773b44dad7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/abc1926c88c189e5d698b91ed6890e09ab5c321d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bb4296de5b538b575978c588cb3738ab8524d01a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d354716245192de2d203f2b35f22ab8dc13595e2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e3b42e326f4f30efcdc90bad5f5ba37e1cd91a47"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f58e568dc308c8e13f7730c8de2da5ed514e540d"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

GHSA-F3WR-G9F6-6VGF

Vulnerability from github – Published: 2026-09-04 18:31 – Updated: 2026-09-04 18:31

Details

In the Linux kernel, the following vulnerability has been resolved:

serial: msm: Disable DMA for kernel console UART

At the moment, concurrent writes from userspace and the kernel to the console can trigger a race condition that results in an infinite loop of the same messages printed over and over again. This is most likely to happen during system startup or shutdown when the init system starts/stops a large number of system services that interact with various kernel code.

When userspace writes to the TTY device, the driver initiates an asynchronous DMA transfer and releases the port lock. At the same moment, the kernel printk path might grab the port lock and re-configure the UART controller for PIO, without waiting for the DMA operation to complete. It seems like this collision results in zero progress being reported for the DMA engine, so the same text is printed to the console over and over again.

For the kernel console, we want a reliable output path that will be functional even during crashes etc. So rather than implementing complex code to synchronize the kernel console write routines with the userspace DMA write routines, simply disable DMA for the console UART instance.

Similar checks exist in many other serial drivers, e.g. 8250_port.c, imx.c, sh-sci.c etc.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-80886"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-04T17:17:01Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: msm: Disable DMA for kernel console UART\n\nAt the moment, concurrent writes from userspace and the kernel to the\nconsole can trigger a race condition that results in an infinite loop of\nthe same messages printed over and over again. This is most likely to\nhappen during system startup or shutdown when the init system starts/stops\na large number of system services that interact with various kernel code.\n\nWhen userspace writes to the TTY device, the driver initiates an\nasynchronous DMA transfer and releases the port lock. At the same moment,\nthe kernel printk path might grab the port lock and re-configure the UART\ncontroller for PIO, without waiting for the DMA operation to complete. It\nseems like this collision results in zero progress being reported for the\nDMA engine, so the same text is printed to the console over and over again.\n\nFor the kernel console, we want a reliable output path that will be\nfunctional even during crashes etc. So rather than implementing complex\ncode to synchronize the kernel console write routines with the userspace\nDMA write routines, simply disable DMA for the console UART instance.\n\nSimilar checks exist in many other serial drivers, e.g. 8250_port.c,\nimx.c, sh-sci.c etc.",
  "id": "GHSA-f3wr-g9f6-6vgf",
  "modified": "2026-09-04T18:31:32Z",
  "published": "2026-09-04T18:31:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80886"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/22dd2777e6c180e1c945b00f6d18550979436324"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2727744ccb5ca59090451451ee94f530b1be04a5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6acea62738ed4cae6746483026706a773b44dad7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/abc1926c88c189e5d698b91ed6890e09ab5c321d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bb4296de5b538b575978c588cb3738ab8524d01a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d354716245192de2d203f2b35f22ab8dc13595e2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e3b42e326f4f30efcdc90bad5f5ba37e1cd91a47"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f58e568dc308c8e13f7730c8de2da5ed514e540d"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-80886 (GCVE-0-2026-80886)

FKIE_CVE-2026-80886

GHSA-F3WR-G9F6-6VGF

Tags

Sightings

Nomenclature