CVE-2026-23293
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
net: vxlan: fix nd_tbl NULL dereference when IPv6 is disabled
In the Linux kernel, the following vulnerability has been resolved: net: vxlan: fix nd_tbl NULL dereference when IPv6 is disabled When booting with the 'ipv6.disable=1' parameter, the nd_tbl is never initialized because inet6_init() exits before ndisc_init() is called which initializes it. If an IPv6 packet is injected into the interface, route_shortcircuit() is called and a NULL pointer dereference happens on neigh_lookup(). BUG: kernel NULL pointer dereference, address: 0000000000000380 Oops: Oops: 0000 [#1] SMP NOPTI [...] RIP: 0010:neigh_lookup+0x20/0x270 [...] Call Trace: <TASK> vxlan_xmit+0x638/0x1ef0 [vxlan] dev_hard_start_xmit+0x9e/0x2e0 __dev_queue_xmit+0xbee/0x14e0 packet_sendmsg+0x116f/0x1930 __sys_sendto+0x1f5/0x200 __x64_sys_sendto+0x24/0x30 do_syscall_64+0x12f/0x1590 entry_SYSCALL_64_after_hwframe+0x76/0x7e Fix this by adding an early check on route_shortcircuit() when protocol is ETH_P_IPV6. Note that ipv6_mod_enabled() cannot be used here because VXLAN can be built-in even when IPv6 is built as a module.
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) |
|---|---|---|---|---|---|
| e15a00aafa4b7953ad717d3cb1ad7acf4ff76945 | affected | git | 649e2bb74da54c96cf20729001e283626a2fefa0 | Unavailable | None listed |
| e15a00aafa4b7953ad717d3cb1ad7acf4ff76945 | affected | git | dc3e62cf3bbf66280a907ec379f373d0c3b8b2bc | Unavailable | None listed |
| e15a00aafa4b7953ad717d3cb1ad7acf4ff76945 | affected | git | b5190fcd75a1f1785c766a8d1e44d3938e168f45 | Unavailable | None listed |
| e15a00aafa4b7953ad717d3cb1ad7acf4ff76945 | affected | git | 5f93e6b4d12bd3a4517a6d447ea675f448f21434 | Unavailable | None listed |
| e15a00aafa4b7953ad717d3cb1ad7acf4ff76945 | affected | git | f0373e9317bc904e7bdb123d3106fe4f3cea2fb7 | Unavailable | None listed |
| e15a00aafa4b7953ad717d3cb1ad7acf4ff76945 | affected | git | fbbd2118982c55fb9b0a753ae0cf7194e77149fb | Unavailable | None listed |
| e15a00aafa4b7953ad717d3cb1ad7acf4ff76945 | affected | git | abcd48ecdeb2e12eccb8339a35534c757782afcd | Unavailable | None listed |
| e15a00aafa4b7953ad717d3cb1ad7acf4ff76945 | affected | git | 168ff39e4758897d2eee4756977d036d52884c7e | 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) |
|---|---|---|---|---|---|
| 3.12 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 3.12 | Unavailable | None listed |
| 5.10.253 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.203 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.167 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.130 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.77 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.17 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 6.19.7 | unaffected | semver | Unavailable | 6.19.* | None listed |
| 7.0 | unaffected | original_commit_for_fix | Unavailable | * | None listed |