Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: ip_tunnel: adapt iptunnel_xmit_stats() to NETDEV_PCPU_STAT_DSTATS Blamed commits forgot that vxlan/geneve use udp_tunnel[6]_xmit_skb() which call iptunnel_xmit_stats(). iptunnel_xmit_stats() was assuming tunnels were only using NETDEV_PCPU_STAT_TSTATS. @syncp offset in pcpu_sw_netstats and pcpu_dstats is different. 32bit kernels would either have corruptions or freezes if the syncp sequence was overwritten. This patch also moves pcpu_stat_type closer to dev->{t,d}stats to avoid a potential cache line miss since iptunnel_xmit_stats() needs to read it.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1db9041e91ac574f1cecc0e98e69ac35832e8088 before 127c5e6e2d6fa8185314537c08204ec3515eae99; affected cb1c1f3b7ef908408064734fb6bdaf5811b8b84c before e40e2d11ced8119d3e4469ebe91264bc1cf71530; affected be226352e8dc77d3313c096b2d8e7f69bf6980fc before 5d562153b4719234227f99c2fb529f98a6a44d15; affected be226352e8dc77d3313c096b2d8e7f69bf6980fc before 0d087d00161f562d5047cc4009bb0c6a19daf9f1; affected be226352e8dc77d3313c096b2d8e7f69bf6980fc before 8431c602f551549f082bbfa67f3003f2d8e3e132; affected 6.6.153 before 6.6.160 |
| Linux / Linux | affected 6.14; unaffected 0 before 6.14; unaffected 6.6.160 through 6.6.*; unaffected 6.18.50 through 6.18.*; unaffected 6.19.10 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/127c5e6e2d6fa8185314537c08204ec3515eae99
- https://git.kernel.org/stable/c/e40e2d11ced8119d3e4469ebe91264bc1cf71530
- https://git.kernel.org/stable/c/5d562153b4719234227f99c2fb529f98a6a44d15
- https://git.kernel.org/stable/c/0d087d00161f562d5047cc4009bb0c6a19daf9f1
- https://git.kernel.org/stable/c/8431c602f551549f082bbfa67f3003f2d8e3e132