In the Linux kernel, the following vulnerability has been resolved: gso: fix udp gso fraglist segmentation after pull from frag_list Detect gso fraglist skbs with corrupted geometry (see below) and pass these to skb_segment instead of skb_segment_list, as the first can segment them correctly. Valid SKB_GSO_FRAGLIST skbs - consist of two or more segments - the head_skb holds the protocol headers plus first gso_size - one or more frag_list skbs hold exactly one segment - all but the last must be gso_size Optional datapath hooks such as NAT and BPF (bpf_skb_pull_data) can modify these skbs, breaking these invariants. In extreme cases they pull all data into skb linear. For UDP, this causes a NULL ptr deref in __udpv4_gso_segment_list_csum at udp_hdr(seg->next)->dest. Detect invalid geometry due to pull, by checking head_skb size. Don't just drop, as this may blackhole a destination. Convert to be able to pass to regular skb_segment.
| Product | Vendor | Version |
|---|---|---|
| Linux | Linux | APQ8053, AQT1000, AR8031, AR8035, CSRA6620, CSRA6640, MDM9150, MSM8953, QCA6390, QCA6391, QCA6420, QCA6426, QCA6430, QCA6436, QCA6574, QCA6574A, QCA6574AU, QCA6595AU, QCA8337, QCM2290, QCM4290, QCM6125, QCM6490, QCS2290, QCS405, QCS410, QCS4290, QCS603, QCS605, QCS610, QCS6125, QCS6490, QRB5165, QRB5165M, QRB5165N, Qualcomm215, SA515M, SA6155, SA6155P, SA8155, SA8155P, SD 8 Gen1 5G, SD429, SD460, SD480, SD662, SD680, SD690 5G, SD750G, SD765, SD765G, SD768G, SD780G, SD855, SD865 5G, SD870, SD888 5G, SDM429W, SDX55, SDX55M, SDX65, SDXR2 5G, SM4125, SM7250P, SM7450, SM8475, SM8475P, WCD9326, WCD9335, WCD9341, WCD9370, WCD9375, WCD9380, WCD9385, WCN3615, WCN3620, WCN3660B, WCN3680, WCN3680B, WCN3910, WCN3950, WCN3980, WCN3988, WCN3990, WCN3991, WCN3998, WCN3999, WCN6740, WCN6750, WCN6850, WCN6851, WCN6855, WCN6856, WCN7850, WCN7851, WSA8810, WSA8815, WSA8830, WSA8832, WSA8835 |
| Linux | Linux | 9.19.1 |