CVE-2026-64577
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)
gtp: check skb_pull_data() return in gtp1u_send_echo_resp()
In the Linux kernel, the following vulnerability has been resolved: gtp: check skb_pull_data() return in gtp1u_send_echo_resp() gtp1u_send_echo_resp() ignores skb_pull_data()'s return value. Its caller gtp1u_udp_encap_recv() only guarantees 16 bytes (udphdr + gtp1_header), but the pull requests 20 (gtp1_header_long + udphdr). For a 16-19 byte echo request the pull fails and returns NULL without advancing skb->data; execution continues, and the following skb_push() plus the IP header pushed by iptunnel_xmit() move skb->data below skb->head, tripping skb_under_panic(). Fix it by dropping the packet when skb_pull_data() fails. skbuff: skb_under_panic: ... kernel BUG at net/core/skbuff.c:214! Call Trace: skb_push (net/core/skbuff.c:2648) iptunnel_xmit (net/ipv4/ip_tunnel_core.c:82) gtp_encap_recv (drivers/net/gtp.c:701 drivers/net/gtp.c:808 drivers/net/gtp.c:920) udp_queue_rcv_one_skb (net/ipv4/udp.c:2388) ... Kernel panic - not syncing: Fatal exception in interrupt
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) |
|---|---|---|---|---|---|
| 9af41cc33471ea1efa6f77e188f055cc77d0a5c5 | affected | git | 9033fe49926f0e7421fefee922dc086417e905cf | Unavailable | None listed |
| 9af41cc33471ea1efa6f77e188f055cc77d0a5c5 | affected | git | b3c733eaae7f362601c28ac1533d47a961cd3e1c | Unavailable | None listed |
| 9af41cc33471ea1efa6f77e188f055cc77d0a5c5 | affected | git | 4fc7923871d176ce0e5fecf4a9b7bb915af790ed | Unavailable | None listed |
| 9af41cc33471ea1efa6f77e188f055cc77d0a5c5 | affected | git | 961e9b1e33445f8e42859ecc020c9f60d8b69a8b | Unavailable | None listed |
| 9af41cc33471ea1efa6f77e188f055cc77d0a5c5 | affected | git | cf45d748e437b8dd2dd987f27ee79c8c86f95c88 | Unavailable | None listed |
| 9af41cc33471ea1efa6f77e188f055cc77d0a5c5 | affected | git | cd170f051dba9ac146fabcd1b91726487c0cb9fa | 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) |
|---|---|---|---|---|---|
| 5.18 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.18 | Unavailable | None listed |
| 6.1.183 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.148 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.101 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.42 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.1.6 | unaffected | semver | Unavailable | 7.1.* | None listed |
| 7.2 | unaffected | original_commit_for_fix | Unavailable | * | None listed |