EUVD-2026-81915

In the Linux kernel, the following vulnerability has been resolved: tcp: fix corruption of urgent data on multi-segment retransmit On the normal xmit path, while in urgent mode we refuse to build a multi-segment TSO packet, so every segment gets its own urgptr: / tcpwritexmit / limit = mssnow; if...

kernel: ipv6: sit: reload inner IPv6 header after GSO offloads

A flaw was found in the Linux kernel's Simple Internet Transition SIT tunnel driver for IPv6. When processing network traffic with Generic Segmentation Offload GSO enabled, the driver may use a stale pointer to the inner IPv6 header after the socket buffer skb head has been reallocated. This can...

kernel: xfrm: fix stale skb->prev after async crypto steals a GSO segment

A flaw was found in the Linux kernel's xfrm subsystem. This vulnerability arises when asynchronous cryptographic operations incorrectly handle network packet segments, leaving a pointer to memory that has already been released. An attacker could potentially exploit this use-after-free condition t...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: netsched: The gsoskb list is also flushed during the -change operation. Previously, when reducing the limit of a qdisc using the -change operation, only the main skb queue was trimmed, potentially leaving packets in the gsoskb...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

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...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerability has been resolved: net: prevented mss overflow in skbsegment Once again, syzbot is able to cause the kernel to crash in skbSegment. “GSOBYFRAGS” is a forbidden value, but unfortunately, the following calculation in skbSegment can easily result in...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: BPF: Do not allow BPF test infra to emit invalid GSO types to the stack. Yinhao et al. reported that their fuzzer tool was able to trigger the skbwarnbadoffload function from netifskbfeatures - gsofeaturescheck. When a BPF progra...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: Net: Consume xmit errors of GSO frames. udpgrofrglist.sh and udpgrobench.sh are the most flaky tests currently in NIPA. They fail in exactly the same way. The TCP GRO test occasionally stalls, and the test terminates after 10...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15

In the Linux kernel, the following vulnerability has been resolved: net: nsh: Use the correct macoffset to unwind gso skb in nshgsosegment. As shown in the call trace, the skbpanic error occurred due to an incorrect skb-macheader in nshgsoSegment. Invalid opcode: 0000 1 PREEMPT SMP KASAN PTI CPU:...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: UDP: Do not accept non-tunnel GSO packets that land in a tunnel. When rx-udp-gro-forwarding is enabled, UDP packets may be forwarded in a way that causes them to land in a tunnel. This can lead to various issues. udpgroreceive...

kernel: net: pull headers in qdisc_pkt_len_segs_init()

A flaw was found in the Linux kernel's handling of Generic Segmentation Offload GSO packet headers. This vulnerability occurs when the qdiscpktlensegsinit function does not properly pull headers into the expected memory location, which can lead to incorrect processing by network drivers. A remote...

kernel: net: pull headers in qdisc_pkt_len_segs_init()

A flaw was found in the Linux kernel's handling of Generic Segmentation Offload GSO packet headers. This vulnerability occurs when the qdiscpktlensegsinit function does not properly pull headers into the expected memory location, which can lead to incorrect processing by network drivers. A remote...

kernel: net: pull headers in qdisc_pkt_len_segs_init()

A flaw was found in the Linux kernel's handling of Generic Segmentation Offload GSO packet headers. This vulnerability occurs when the qdiscpktlensegsinit function does not properly pull headers into the expected memory location, which can lead to incorrect processing by network drivers. A remote...

kernel: net: pull headers in qdisc_pkt_len_segs_init()

A flaw was found in the Linux kernel's handling of Generic Segmentation Offload GSO packet headers. This vulnerability occurs when the qdiscpktlensegsinit function does not properly pull headers into the expected memory location, which can lead to incorrect processing by network drivers. A remote...

kernel: ipv6: sit: reload inner IPv6 header after GSO offloads

A flaw was found in the Linux kernel's Simple Internet Transition SIT tunnel driver for IPv6. When processing network traffic with Generic Segmentation Offload GSO enabled, the driver may use a stale pointer to the inner IPv6 header after the socket buffer skb head has been reallocated. This can...

Unbreakable Enterprise kernel security update

5.4.17-2136.359.3.1 - inet: frags: strip GSO state from fragments before reassembly Xinyang Ge Orabug: 39974845 CVE-2026-80590 5.4.17-2136.359.3 - Partial revert of 'x86/alternatives: Optimize optimizenops' Harshit Mogalapalli Orabug: 39866546 - Revert 'x86/alternatives: Add altinstr.flags' Harsh...

Oracle Linux 8 / 9 : Unbreakable Enterprise kernel (ELSA-2026-500249)

The remote Oracle Linux 8 / 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-500249 advisory. - inet: frags: strip GSO state from fragments before reassembly Xinyang Ge Orabug: 39974835 CVE-2026-80590 - KVM: x86/mmu: Stop needlessly making...

Unbreakable Enterprise kernel security update

5.15.0-324.217.5.2 - inet: frags: strip GSO state from fragments before reassembly Xinyang Ge Orabug: 39974835 CVE-2026-80590 5.15.0-324.217.5.1 - crypto: qat: restore misc workqueue lifecycle Manjunath Patil Orabug: 39937535 - LTS version: v5.15.217 Vijayendra Suman - ring-buffer: Use...

CVE-2026-80590

A flaw was found in the Linux kernel's network fragment reassembly process. An unprivileged local user, or a guest in a virtualized environment, could craft specially formed IPv4 or IPv6 network fragments that incorrectly retain Generic Segmentation Offload GSO state after reassembly. This...

SUSE CVE-2026-80590

In the Linux kernel, the following vulnerability has been resolved: inet: frags: strip GSO state from fragments before reassembly A virtionethdr tun/tap, or AFPACKET with PACKETVNETHDR can mark an IPv4 or IPv6 fragment as GSO; nothing relates gsotype to fragoff...