Vulnerability-Lookup

FKIE_CVE-2026-43203

Vulnerability from fkie_nvd - Published: 2026-05-06 12:16 - Updated: 2026-05-11 20:10

Severity ?

7.5 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: atm: fore200e: fix use-after-free in tasklets during device removal When the PCA-200E or SBA-200E adapter is being detached, the fore200e is deallocated. However, the tx_tasklet or rx_tasklet may still be running or pending, leading to use-after-free bug when the already freed fore200e is accessed again in fore200e_tx_tasklet() or fore200e_rx_tasklet(). One of the race conditions can occur as follows: CPU 0 (cleanup) | CPU 1 (tasklet) fore200e_pca_remove_one() | fore200e_interrupt() fore200e_shutdown() | tasklet_schedule() kfree(fore200e) | fore200e_tx_tasklet() | fore200e-> // UAF Fix this by ensuring tx_tasklet or rx_tasklet is properly canceled before the fore200e is released. Add tasklet_kill() in fore200e_shutdown() to synchronize with any pending or running tasklets. Moreover, since fore200e_reset() could prevent further interrupts or data transfers, the tasklet_kill() should be placed after fore200e_reset() to prevent the tasklet from being rescheduled in fore200e_interrupt(). Finally, it only needs to do tasklet_kill() when the fore200e state is greater than or equal to FORE200E_STATE_IRQ, since tasklets are uninitialized in earlier states. In a word, the tasklet_kill() should be placed in the FORE200E_STATE_IRQ branch within the switch...case structure. This bug was identified through static analysis.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5189368f10903956be05062d160b2804bf5e5016	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/73fbc5d1a9ccb626937500bbd67136f077d8237b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8930878101cd40063888a68af73b1b0f8b6c79bc	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/91f25749aaf57c47ae1e12478144e6ea8c8562f2	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/97900f512252a59f23d6ce4ab215cc88fed66e68	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/aba0b4bc09376dfc3d53c826514fe38fc8337f52	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e075ec9b08f862dade8011481058f7eb5f716c57	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e4ff4e3ffcf9d5aad380cdd1d8cdc008bb34f97d	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12

JSON

To clipboard

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CVE-2026-43203 (GCVE-0-2026-43203)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:28 – Updated: 2026-05-11 22:19

Title

atm: fore200e: fix use-after-free in tasklets during device removal

Summary

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/91f25749aaf57c47a…
https://git.kernel.org/stable/c/73fbc5d1a9ccb6269…
https://git.kernel.org/stable/c/aba0b4bc09376dfc3…
https://git.kernel.org/stable/c/e075ec9b08f862dad…
https://git.kernel.org/stable/c/97900f512252a59f2…
https://git.kernel.org/stable/c/e4ff4e3ffcf9d5aad…
https://git.kernel.org/stable/c/5189368f10903956b…
https://git.kernel.org/stable/c/8930878101cd40063…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 91f25749aaf57c47ae1e12478144e6ea8c8562f2 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 73fbc5d1a9ccb626937500bbd67136f077d8237b (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < aba0b4bc09376dfc3d53c826514fe38fc8337f52 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e075ec9b08f862dade8011481058f7eb5f716c57 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 97900f512252a59f23d6ce4ab215cc88fed66e68 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e4ff4e3ffcf9d5aad380cdd1d8cdc008bb34f97d (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 5189368f10903956be05062d160b2804bf5e5016 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8930878101cd40063888a68af73b1b0f8b6c79bc (git)
Linux	Linux	Affected: 2.6.12 Unaffected: 0 , < 2.6.12 (semver) Unaffected: 5.10.252 , ≤ 5.10.* (semver) Unaffected: 5.15.202 , ≤ 5.15.* (semver) Unaffected: 6.1.165 , ≤ 6.1.* (semver) Unaffected: 6.6.128 , ≤ 6.6.* (semver) Unaffected: 6.12.75 , ≤ 6.12.* (semver) Unaffected: 6.18.16 , ≤ 6.18.* (semver) Unaffected: 6.19.6 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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          "programFiles": [
            "drivers/atm/fore200e.c"
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:19:58.630Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/91f25749aaf57c47ae1e12478144e6ea8c8562f2"
        },
        {
          "url": "https://git.kernel.org/stable/c/73fbc5d1a9ccb626937500bbd67136f077d8237b"
        },
        {
          "url": "https://git.kernel.org/stable/c/aba0b4bc09376dfc3d53c826514fe38fc8337f52"
        },
        {
          "url": "https://git.kernel.org/stable/c/e075ec9b08f862dade8011481058f7eb5f716c57"
        },
        {
          "url": "https://git.kernel.org/stable/c/97900f512252a59f23d6ce4ab215cc88fed66e68"
        },
        {
          "url": "https://git.kernel.org/stable/c/e4ff4e3ffcf9d5aad380cdd1d8cdc008bb34f97d"
        },
        {
          "url": "https://git.kernel.org/stable/c/5189368f10903956be05062d160b2804bf5e5016"
        },
        {
          "url": "https://git.kernel.org/stable/c/8930878101cd40063888a68af73b1b0f8b6c79bc"
        }
      ],
      "title": "atm: fore200e: fix use-after-free in tasklets during device removal",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43203",
    "datePublished": "2026-05-06T11:28:08.949Z",
    "dateReserved": "2026-05-01T14:12:55.992Z",
    "dateUpdated": "2026-05-11T22:19:58.630Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Action not permitted

FKIE_CVE-2026-43203

CVE-2026-43203 (GCVE-0-2026-43203)

Tags

Sightings

Nomenclature