CVE-2026-80862

CVE CVE-2026-80862EUVD EUVD-2026-71312Published 2026-09-04T15:55:16.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: fix usage of page_frag_cache nvme uses page_frag_cache to preallocate PDU for each preallocated request of block device. Block devices are created in parallel threads, consequently page_frag_cache is used in not thread-safe manner. That leads to incorrect refcounting of backstore pages and premature free. That can be catched by !sendpage_ok inside network stack: WARNING: CPU: 7 PID: 467 at ../net/core/skbuff.c:6931 skb_splice_from_iter+0xfa/0x310. tcp_sendmsg_locked+0x782/0xce0 tcp_sendmsg+0x27/0x40 sock_sendmsg+0x8b/0xa0 nvme_tcp_try_send_cmd_pdu+0x149/0x2a0 Then random panic may occur. Fix that by serializing the usage of page_frag_cache.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 4e893ca8117022de68ce1b61c0309e3d17bb8a25 <36ac05f7cfd59d90c597071304b14e98090d5dd1; 4e893ca8117022de68ce1b61c0309e3d17bb8a25 <64561afb42d8390695bf810d9bbd087cbca00291; patch: 7.2.3; patch: 6.12.108; patch: 7.1.13; 4e893ca8117022de68ce1b61c0309e3d17bb8a25 <6e4cf281558709b92ec2ca3054fe2ffc69266ef9; 4e893ca8117022de68ce1b61c0309e3d17bb8a25 <0a9750263ffacbbd2048a391fd4bd22e2146c57d; patch: 6.18.49; 6.12; patch: 7.3-rc1; patch: 0; 4e893ca8117022de68ce1b61c0309e3d17bb8a25 <d19f98c79f1b7e09e4cdf5c20d626e571e487467

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

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