Riskcovery

CVE-2025-68797

char: applicom: fix NULL pointer dereference in ac_ioctl

State
Published
Severity
Not scored
Published
Jan 13, 2026
Updated
May 11, 2026
Reserved
Dec 24, 2025

Read the record on cve.org

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 5a6240804fb7bbd4f5f6e706955248a6f4c1abbcAffected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before d1b0452280029d05a98c75631131ee61c0b0d084Affected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 0b8b353e09888bccee405e0dd6feafb60360f478Affected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before d285517429a75423789e6408653e57b6fdfc8e54Affected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 74883565c621eec6cd2e35fe6d27454cf2810c23Affected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before f83e3e9f89181b42f6076a115d767a7552c4a39eAffected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 82d12088c297fa1cef670e1718b3d24f414c23f7Affected
LinuxLinux
  • 2.6.12Affected
  • before 2.6.12Not affected
  • 5.10.248 through 5.10.*Not affected
  • 5.15.198 through 5.15.*Not affected
  • 6.1.160 through 6.1.*Not affected
  • 6.6.120 through 6.6.*Not affected
  • 6.12.64 through 6.12.*Not affected
  • 6.18.3 through 6.18.*Not affected
  • 6.19 and laterNot affected

References

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