FKIE_CVE-2025-68797

Vulnerability from fkie_nvd - Published: 2026-01-13 16:16 - Updated: 2026-01-19 13:16
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: char: applicom: fix NULL pointer dereference in ac_ioctl Discovered by Atuin - Automated Vulnerability Discovery Engine. In ac_ioctl, the validation of IndexCard and the check for a valid RamIO pointer are skipped when cmd is 6. However, the function unconditionally executes readb(apbs[IndexCard].RamIO + VERS) at the end. If cmd is 6, IndexCard may reference a board that does not exist (where RamIO is NULL), leading to a NULL pointer dereference. Fix this by skipping the readb access when cmd is 6, as this command is a global information query and does not target a specific board context.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0b8b353e09888bccee405e0dd6feafb60360f478
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5a6240804fb7bbd4f5f6e706955248a6f4c1abbc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/74883565c621eec6cd2e35fe6d27454cf2810c23
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/82d12088c297fa1cef670e1718b3d24f414c23f7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d1b0452280029d05a98c75631131ee61c0b0d084
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d285517429a75423789e6408653e57b6fdfc8e54
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f83e3e9f89181b42f6076a115d767a7552c4a39e
Impacted products
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nchar: applicom: fix NULL pointer dereference in ac_ioctl\n\nDiscovered by Atuin - Automated Vulnerability Discovery Engine.\n\nIn ac_ioctl, the validation of IndexCard and the check for a valid\nRamIO pointer are skipped when cmd is 6. However, the function\nunconditionally executes readb(apbs[IndexCard].RamIO + VERS) at the\nend.\n\nIf cmd is 6, IndexCard may reference a board that does not exist\n(where RamIO is NULL), leading to a NULL pointer dereference.\n\nFix this by skipping the readb access when cmd is 6, as this\ncommand is a global information query and does not target a specific\nboard context."
    }
  ],
  "id": "CVE-2025-68797",
  "lastModified": "2026-01-19T13:16:14.250",
  "metrics": {},
  "published": "2026-01-13T16:16:01.660",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0b8b353e09888bccee405e0dd6feafb60360f478"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5a6240804fb7bbd4f5f6e706955248a6f4c1abbc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/74883565c621eec6cd2e35fe6d27454cf2810c23"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/82d12088c297fa1cef670e1718b3d24f414c23f7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d1b0452280029d05a98c75631131ee61c0b0d084"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d285517429a75423789e6408653e57b6fdfc8e54"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f83e3e9f89181b42f6076a115d767a7552c4a39e"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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