DEBIAN-CVE-2026-98038

In the Linux kernel, the following vulnerability has been resolved: bpf: Keep refcountacquire nullable for borrowed RCU kptrs bpfrefcountacquire is fallible for a borrowed reference because the object may have reached a zero refcount. The verifier therefore keeps KFRETNULL on the return value...

EUVD-2026-86691

In the Linux kernel, the following vulnerability has been resolved: bpf: Keep refcountacquire nullable for borrowed RCU kptrs bpfrefcountacquire is fallible for a borrowed reference because the object may have reached a zero refcount. The verifier therefore keeps KFRETNULL on the return value...

EUVD-2026-86690

In the Linux kernel, the following vulnerability has been resolved: bpf: Reject untrusted allocated-object pointers When the final RCU read-side critical section ends, a local kptr is demoted to PTRUNTRUSTED but retains MEMALLOC. The pointer may be NULL or may refer to an object whose lifetime is...

CVE-2023-53645: Use After Free

In the Linux kernel, the following vulnerability has been resolved: bpf: Make bpfrefcountacquire fallible for non-owning refs This patch fixes an incorrect assumption made in the original bpfrefcount series 0, specifically that the BPF program calling bpfrefcountacquire on some node can always...