What’s Vulnerable › Vulnerabilities

CVE-2026-80679: s390/dasd: Fix potential NULL pointer dereference

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-28 · updated 2026-08-28

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.

Affected products

• Linux kernel: 5.3 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

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
• https://git.kernel.org/stable/c/cdc7b73d0c5a9cd6360b4f8c36eae23b02097e4c
• https://git.kernel.org/stable/c/dbf2ae34d2f1390a9fc1abf3dce7f809e022caae
• https://git.kernel.org/stable/c/e156c70c505c6c9adce3b7be5a82025f00544709

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