CVE-2026-63992

A flaw was found in the Linux kernel's tunnels module. This vulnerability occurs when the iptunnelpmtudcheckicmp function is called without the skb transport header being properly set. An attacker could exploit this condition to trigger an out-of-bound memory access, which may lead to system...

SUSE CVE-2025-68363

In the Linux kernel, the following vulnerability has been resolved: bpf: Check skb-transportheader is set in bpfskbcheckmtu The bpfskbcheckmtu helper needs to use skb-transportheader when the BPFMTUCHKSEGS flag is used: bpfskbcheckmtuskb, ifindex, &mtulen, 0, BPFMTUCHKSEGS The transportheader is...

AZL-73135 CVE-2025-68363 affecting package kernel for versions less than 6.6.121.1-1

In the Linux kernel, the following vulnerability has been resolved: bpf: Check skb-transportheader is set in bpfskbcheckmtu The bpfskbcheckmtu helper needs to use skb-transportheader when the BPFMTUCHKSEGS flag is used: bpfskbcheckmtuskb, ifindex, &mtulen, 0, BPFMTUCHKSEGS The transportheader is...

CVE-2025-68363

CVE-2025-68363 : Linux kernel BPF MTU check bug. The helper bpf_skb_check_mtu used skb->transport_header without guaranteeing that skb_transport_header was set, causing a WARN_ON_ONCE during BPF test_run. The fix adds a guard using skb_transport_header_was_set() and performs the check just bef...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerabilities have been resolved: ipv6: Rejected malicious packets in ipv6gsoSegment. syzbot was able to create a packet with very long IPv6 extension headers, leading to an overflow of skb-transportheader. This 16-bit field has a limited range. Add the...

SUSE CVE-2023-53439

In the Linux kernel, the following vulnerability has been resolved: net: skbpartialcsumset fix against transport header magic value skb-transportheader uses the special 0xFFFF value to mark if the transport header was set or not. We must prevent callers to accidentaly set skb-transportheader to...

UBUNTU-CVE-2023-53439

In the Linux kernel, the following vulnerability has been resolved: net: skbpartialcsumset fix against transport header magic value skb-transportheader uses the special 0xFFFF value to mark if the transport header was set or not. We must prevent callers to accidentaly set skb-transportheader to...

CVE-2023-53439

CVE-2023-53439 concerns the Linux kernel fix for skb_partial_csum_set() where skb->transport_header used the sentinel value 0xFFFF to indicate the transport header status. The description indicates the vulnerability arose from callers potentially setting skb->transport_header to 0xFFFF, and...

UBUNTU-CVE-2022-49340

In the Linux kernel, the following vulnerability has been resolved: ipgre: test csumstart instead of transport header GRE with TUNNELCSUM will apply local checksum offload on CHECKSUMPARTIAL packets. ipgrexmit must validate csumstart after an optional skbpull, else lcocsum may trigger an overflow...

kernel: ip_gre: test csum_start instead of transport header

In the Linux kernel, the following vulnerability has been resolved: ipgre: test csumstart instead of transport header GRE with TUNNELCSUM will apply local checksum offload on CHECKSUMPARTIAL packets. ipgrexmit must validate csumstart after an optional skbpull, else lcocsum may trigger an overflow...