Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: vxlan: use pskb_network_may_pull() in route_shortcircuit() route_shortcircuit() currently calls pskb_may_pull(skb, sizeof(struct iphdr)) (or ipv6hdr), which checks if bytes are available starting from skb->data. However, in vxlan_xmit(), skb->data points to the MAC header, so skb_network_offset(skb) is ETH_HLEN (14 bytes). Using pskb_may_pull(skb, 20) only checks 20 bytes from skb->data (which is 14 bytes MAC header + 6 bytes of IP header), leaving the rest of the IP header potentially un-pulled in non-linear frags. Subsequent dereferences of ip_hdr(skb)->daddr can read beyond the pulled linear buffer length. Fix this by using pskb_network_may_pull(), which adds skb_network_offset(skb) to the length check to ensure the full network header is present in the linear buffer.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected e4f67addf158f98f8197e08974966b18480dc751 before c419af4924c1593500a40519730ed98575d04a3e; affected e4f67addf158f98f8197e08974966b18480dc751 before 6bd0a3a1b5744166946f0c551a6665c3b46b05e4; affected e4f67addf158f98f8197e08974966b18480dc751 before 214ba43faf106cb06cd3dd30999c5c809c868b53; affected e4f67addf158f98f8197e08974966b18480dc751 before 42887be7c4cf283cce02cd0fb6411221167c8b6c; affected e4f67addf158f98f8197e08974966b18480dc751 before aa0d31376d574ac858a40078431a77127bf04ee4; affected e4f67addf158f98f8197e08974966b18480dc751 before ee799977d7941dbfb11049e17edd9eaf4f8820f7; affected e4f67addf158f98f8197e08974966b18480dc751 before 4f3f96e771a20263635bb5e1307c112d613b4bbd; affected e4f67addf158f98f8197e08974966b18480dc751 before 26bb2dd0a8839617e2c79ffbbe1923f8e4bab9fb |
| Linux / Linux | affected 3.8; unaffected 0 before 3.8; unaffected 5.10.265 through 5.10.*; unaffected 5.15.216 through 5.15.*; unaffected 6.1.183 through 6.1.*; unaffected 6.6.151 through 6.6.*; unaffected 6.12.103 through 6.12.*; unaffected 6.18.44 through 6.18.*; unaffected 7.1.8 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/c419af4924c1593500a40519730ed98575d04a3e
- https://git.kernel.org/stable/c/6bd0a3a1b5744166946f0c551a6665c3b46b05e4
- https://git.kernel.org/stable/c/214ba43faf106cb06cd3dd30999c5c809c868b53
- https://git.kernel.org/stable/c/42887be7c4cf283cce02cd0fb6411221167c8b6c
- https://git.kernel.org/stable/c/aa0d31376d574ac858a40078431a77127bf04ee4
- https://git.kernel.org/stable/c/ee799977d7941dbfb11049e17edd9eaf4f8820f7
- https://git.kernel.org/stable/c/4f3f96e771a20263635bb5e1307c112d613b4bbd
- https://git.kernel.org/stable/c/26bb2dd0a8839617e2c79ffbbe1923f8e4bab9fb
ADP enrichment
No English description supplied.
No references supplied.