CVE-2021-47309
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
net: validate lwtstate->data before returning from skb_tunnel_info()
In the Linux kernel, the following vulnerability has been resolved: net: validate lwtstate->data before returning from skb_tunnel_info() skb_tunnel_info() returns pointer of lwtstate->data as ip_tunnel_info type without validation. lwtstate->data can have various types such as mpls_iptunnel_encap, etc and these are not compatible. So skb_tunnel_info() should validate before returning that pointer. Splat looks like: BUG: KASAN: slab-out-of-bounds in vxlan_get_route+0x418/0x4b0 [vxlan] Read of size 2 at addr ffff888106ec2698 by task ping/811 CPU: 1 PID: 811 Comm: ping Not tainted 5.13.0+ #1195 Call Trace: dump_stack_lvl+0x56/0x7b print_address_description.constprop.8.cold.13+0x13/0x2ee ? vxlan_get_route+0x418/0x4b0 [vxlan] ? vxlan_get_route+0x418/0x4b0 [vxlan] kasan_report.cold.14+0x83/0xdf ? vxlan_get_route+0x418/0x4b0 [vxlan] vxlan_get_route+0x418/0x4b0 [vxlan] [ ... ] vxlan_xmit_one+0x148b/0x32b0 [vxlan] [ ... ] vxlan_xmit+0x25c5/0x4780 [vxlan] [ ... ] dev_hard_start_xmit+0x1ae/0x6e0 __dev_queue_xmit+0x1f39/0x31a0 [ ... ] neigh_xmit+0x2f9/0x940 mpls_xmit+0x911/0x1600 [mpls_iptunnel] lwtunnel_xmit+0x18f/0x450 ip_finish_output2+0x867/0x2040 [ ... ]
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 61adedf3e3f1d3f032c5a6a299978d91eff6d555 | affected | git | e7f3c9df40515a6c6b46f36c4c94cf48a043f887 | Unavailable | None listed |
| 61adedf3e3f1d3f032c5a6a299978d91eff6d555 | affected | git | b61d327cd3cc5ea591f3bf751dd11e034f388bb5 | Unavailable | None listed |
| 61adedf3e3f1d3f032c5a6a299978d91eff6d555 | affected | git | 83bdcfbd968bcc91a0632b7b625e4a9b0cba5e0d | Unavailable | None listed |
| 61adedf3e3f1d3f032c5a6a299978d91eff6d555 | affected | git | 8bb1589c89e61e3b182dd546f1021928ebb5c2a6 | Unavailable | None listed |
| 61adedf3e3f1d3f032c5a6a299978d91eff6d555 | affected | git | 8aa13a86964cdec4fd969ef677c6614ff068641a | Unavailable | None listed |
| 61adedf3e3f1d3f032c5a6a299978d91eff6d555 | affected | git | 2179d96ec702cc33ead02a9ce40ece599b8538c5 | Unavailable | None listed |
| 61adedf3e3f1d3f032c5a6a299978d91eff6d555 | affected | git | a915379594f1e045421635c6316d8f3ffa018c58 | Unavailable | None listed |
| 61adedf3e3f1d3f032c5a6a299978d91eff6d555 | affected | git | 67a9c94317402b826fc3db32afc8f39336803d97 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4.3 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.3 | Unavailable | None listed |
| 4.4.277 | unaffected | semver | Unavailable | 4.4.* | None listed |
| 4.9.277 | unaffected | semver | Unavailable | 4.9.* | None listed |
| 4.14.241 | unaffected | semver | Unavailable | 4.14.* | None listed |
| 4.19.199 | unaffected | semver | Unavailable | 4.19.* | None listed |
| 5.4.135 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.53 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.13.5 | unaffected | semver | Unavailable | 5.13.* | None listed |
| 5.14 | unaffected | original_commit_for_fix | Unavailable | * | None listed |