Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 5a6240804fb7bbd4f5f6e706955248a6f4c1abbc; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before d1b0452280029d05a98c75631131ee61c0b0d084; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 0b8b353e09888bccee405e0dd6feafb60360f478; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before d285517429a75423789e6408653e57b6fdfc8e54; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 74883565c621eec6cd2e35fe6d27454cf2810c23; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before f83e3e9f89181b42f6076a115d767a7552c4a39e; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 82d12088c297fa1cef670e1718b3d24f414c23f7 |
| Linux / Linux | affected 2.6.12; unaffected 0 before 2.6.12; unaffected 5.10.248 through 5.10.*; unaffected 5.15.198 through 5.15.*; unaffected 6.1.160 through 6.1.*; unaffected 6.6.120 through 6.6.*; unaffected 6.12.64 through 6.12.*; unaffected 6.18.3 through 6.18.*; unaffected 6.19 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/5a6240804fb7bbd4f5f6e706955248a6f4c1abbc
- https://git.kernel.org/stable/c/d1b0452280029d05a98c75631131ee61c0b0d084
- https://git.kernel.org/stable/c/0b8b353e09888bccee405e0dd6feafb60360f478
- https://git.kernel.org/stable/c/d285517429a75423789e6408653e57b6fdfc8e54
- https://git.kernel.org/stable/c/74883565c621eec6cd2e35fe6d27454cf2810c23
- https://git.kernel.org/stable/c/f83e3e9f89181b42f6076a115d767a7552c4a39e
- https://git.kernel.org/stable/c/82d12088c297fa1cef670e1718b3d24f414c23f7