CVE-2023-53559 - ip_vti: fix potential slab-use-after-free in decode_session6

CVE-2023-53559 - ip_vti: fix potential slab-use-after-free in decode_session6

https://cvefeed.io/rssfeed/latest.atom / Sat, 10/04/2025 - 17:42
CVE ID : CVE-2023-53559
Published : Oct. 4, 2025, 3:17 p.m. | 25 minutes ago
Description : In the Linux kernel, the following vulnerability has been resolved: ip_vti: fix potential slab-use-after-free in decode_session6 When ip_vti device is set to the qdisc of the sfb type, the cb field of the sent skb may be modified during enqueuing. Then, slab-use-after-free may occur when ip_vti device sends IPv6 packets. As commit f855691975bb ("xfrm6: Fix the nexthdr offset in _decode_session6.") showed, xfrm_decode_session was originally intended only for the receive path. IP6CB(skb)->nhoff is not set during transmission. Therefore, set the cb field in the skb to 0 before sending packets.
Severity: 0.0 | NA
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