{"id":"CVE-2025-68797","summary":"char: applicom: fix NULL pointer dereference in ac_ioctl","details":"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.","modified":"2026-03-31T17:29:57.190309Z","published":"2026-01-13T15:29:07.575Z","related":["MGASA-2026-0017","MGASA-2026-0018","SUSE-SU-2026:0447-1","SUSE-SU-2026:0472-1","SUSE-SU-2026:0473-1","SUSE-SU-2026:0587-1","SUSE-SU-2026:20477-1","SUSE-SU-2026:20498-1","SUSE-SU-2026:20555-1","SUSE-SU-2026:20599-1","SUSE-SU-2026:20615-1","SUSE-SU-2026:20845-1","SUSE-SU-2026:20876-1","openSUSE-SU-2026:20287-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68797.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0b8b353e09888bccee405e0dd6feafb60360f478"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5a6240804fb7bbd4f5f6e706955248a6f4c1abbc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/74883565c621eec6cd2e35fe6d27454cf2810c23"},{"type":"WEB","url":"https://git.kernel.org/stable/c/82d12088c297fa1cef670e1718b3d24f414c23f7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d1b0452280029d05a98c75631131ee61c0b0d084"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d285517429a75423789e6408653e57b6fdfc8e54"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f83e3e9f89181b42f6076a115d767a7552c4a39e"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68797.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-68797"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2"},{"fixed":"5a6240804fb7bbd4f5f6e706955248a6f4c1abbc"},{"fixed":"d1b0452280029d05a98c75631131ee61c0b0d084"},{"fixed":"0b8b353e09888bccee405e0dd6feafb60360f478"},{"fixed":"d285517429a75423789e6408653e57b6fdfc8e54"},{"fixed":"74883565c621eec6cd2e35fe6d27454cf2810c23"},{"fixed":"f83e3e9f89181b42f6076a115d767a7552c4a39e"},{"fixed":"82d12088c297fa1cef670e1718b3d24f414c23f7"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-68797.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.12"},{"fixed":"5.10.248"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.198"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.160"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.120"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.64"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.3"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-68797.json"}}],"schema_version":"1.7.5"}