Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_flow_table: drop existing skb dst before skb_dst_set_noref() Incoming skbs passing through netfilter flowtable offload hooks (or XFRM offload path) might already carry a ref-counted dst_entry assigned during earlier RX or routing steps. Calling skb_dst_set_noref() when skb already holds a ref-counted dst overwrites skb->_skb_refdst, leaking the previous dst_entry reference count and triggering a DEBUG_NET_WARN_ON_ONCE assertion in skb_dst_check_unset(): WARNING: at skb_dst_check_unset include/linux/skbuff.h:1170 WARNING: at skb_dst_set_noref include/linux/skbuff.h:1234 WARNING: at nf_flow_offload_ip_hook+0xf6c/0x2b60 net/netfilter/nf_flow_table_ip.c:864 Drop any existing dst_entry reference with skb_dst_drop(skb) before setting the non-referenced flowtable destination.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 2a79fd3908acd88e6cb0e620c314d7b1fee56a02 before 4db3b48a966ed479b99cc8319ea9e46d4f7c703b; affected 2a79fd3908acd88e6cb0e620c314d7b1fee56a02 before 274f544a32c08638ee887f2e27e3235b6b1237d4; affected 2a79fd3908acd88e6cb0e620c314d7b1fee56a02 before 12afa450a6a6c0cce2c42b7545a9958f62d8a00c; affected 2a79fd3908acd88e6cb0e620c314d7b1fee56a02 before 538e67e8c7889cf5f93951f5309d1bcb41f86036; affected 2a79fd3908acd88e6cb0e620c314d7b1fee56a02 before 8aecf0bbcc72605592134c917c222207d8f63ab0; affected b4b1adf2e66ecc7125c4117e7aad9ff61e2cfd27; affected 209dedf806d31095968f54323dbe62525b077b33; affected 4.16.15 before 4.17; affected 4.17.1 before 4.18 |
| Linux / Linux | affected 4.18; unaffected 0 before 4.18; unaffected 6.6.160 through 6.6.*; unaffected 6.12.114 through 6.12.*; unaffected 6.18.45 through 6.18.*; unaffected 7.1.9 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/4db3b48a966ed479b99cc8319ea9e46d4f7c703b
- https://git.kernel.org/stable/c/274f544a32c08638ee887f2e27e3235b6b1237d4
- https://git.kernel.org/stable/c/12afa450a6a6c0cce2c42b7545a9958f62d8a00c
- https://git.kernel.org/stable/c/538e67e8c7889cf5f93951f5309d1bcb41f86036
- https://git.kernel.org/stable/c/8aecf0bbcc72605592134c917c222207d8f63ab0
ADP enrichment
No English description supplied.
No references supplied.