CVE-2026-80679

Description

In the Linux kernel, the following vulnerability has been resolved: s390/dasd: Fix potential NULL pointer dereference dasd_release_space() checks the implementation of the is_ese() discipline function before calling it to determine if a given device is an ESE DASD. The current usage of the logical AND operator will lead to a NULL pointer dereference as the function is called even if the function pointer is NULL. Fix this by using the logical OR operator.

References

• https://git.kernel.org/stable/c/3000367a512b1283ca52230bf21f8c91dfbec45b
• https://git.kernel.org/stable/c/3453a993a3f14c1684560ecf26585046976f6ac6
• https://git.kernel.org/stable/c/86cdfd061509bcde84f3145f7221ba64e3e53b1f
• https://git.kernel.org/stable/c/96b8e09b09539f252a5eeea6baebd93c2e3779bd
• https://git.kernel.org/stable/c/9973026f572db6b67570cadc30942f3014e41079