Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: BPF: Narrow access to the pointer ctx fields is now rejected. The following BPF program, simplified from a syzkaller repro, causes a kernel warning: c r0 = u8 r1 + 169; exit; Here, the pointer field sk is located at offset 168 in...

CVE-2025-38591 bpf: Reject narrower access to pointer ctx fields

In the Linux kernel, the following vulnerability has been resolved: bpf: Reject narrower access to pointer ctx fields The following BPF program, simplified from a syzkaller repro, causes a kernel warning: r0 = u8 r1 + 169; exit; With pointer field sk being at offset 168 in skbuff. This access is...

CVE-2025-38591 bpf: Reject narrower access to pointer ctx fields

In the Linux kernel, the following vulnerability has been resolved: bpf: Reject narrower access to pointer ctx fields The following BPF program, simplified from a syzkaller repro, causes a kernel warning: r0 = u8 r1 + 169; exit; With pointer field sk being at offset 168 in skbuff. This access is...

kernel: gro: reset dev and skb_iff on skb reuse

The napireuseskb function in net/core/dev.c in the Generic Receive Offload GRO implementation in the Linux kernel before 2.6.38 does not reset the values of certain structure members, which might allow remote attackers to cause a denial of service NULL pointer dereference via a malformed VLAN fra...