CVSS 7.5 · High EPSS 0,63%
Kerentanan pada linux kernel. Skor CVSS 3.1 7.5 (High) menurut CNA.
In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_queue: do shared-unconfirmed check before segmentation Ulrich reports a regression with nfqueue: If an application did not set the 'F_GSO' capability flag and a gso packet with an unconfirmed nf_conn entry is received all packets are now dropped instead of queued, because the check happens after skb_gso_segment(). In that case, we did have exclusive ownership of the skb and its associated conntrack entry. The elevated use count is due to skb_clone happening via skb_gso_segment(). Move the check so that its peformed vs. the aggregated packet. Then, annotate the individual segments except the first one so we can do a 2nd check at reinject time. For the normal case, where userspace does in-order reinjects, this avoids packet drops: first reinjected segment continues traversal and confirms entry, remaining segments observe the confirmed entry. While at it, simplify nf_ct_drop_unconfirmed(): We only care about unconfirmed entries with a refcnt > 1, there is no need to special-case dying entries. This only happens with UDP. With TCP, the only unconfirmed packet will be the TCP SYN, those aren't aggregated by GRO. Next patch adds a udpgro test case to cover this scenario.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Versi 5.15.166 hingga sebelum 5.16 |
| linux | linux kernel | Versi 6.1.107 hingga sebelum 6.2 |
| linux | linux kernel | Versi 6.6.48 hingga sebelum 6.7 |
| linux | linux kernel | Versi 6.10.7 hingga sebelum 6.11 |
| linux | linux kernel | Versi 6.11.1 hingga sebelum 6.12.75 |
| linux | linux kernel | Versi 6.13 hingga sebelum 6.18.14 |
| linux | linux kernel | Versi 6.19 hingga sebelum 6.19.4 |
| linux | linux kernel | Versi 6.11 |
| linux | linux kernel | Versi 6.11 rc4 |
| linux | linux kernel | Versi 6.11 rc5 |
| linux | linux kernel | Versi 6.11 rc6 |
| linux | linux kernel | Versi 6.11 rc7 |