CVE-2026-80862None▾ SunlitIn 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 paralle…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
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.
Linux >= 4e893ca8117022de68ce1b61c0309e3d17bb8a25 < d19f98c79f1b7e09e4cdf5c20d626e571e487467Linux >= 4e893ca8117022de68ce1b61c0309e3d17bb8a25 < 64561afb42d8390695bf810d9bbd087cbca00291Linux >= 4e893ca8117022de68ce1b61c0309e3d17bb8a25 < 0a9750263ffacbbd2048a391fd4bd22e2146c57dLinux >= 4e893ca8117022de68ce1b61c0309e3d17bb8a25 < 6e4cf281558709b92ec2ca3054fe2ffc69266ef9Linux >= 4e893ca8117022de68ce1b61c0309e3d17bb8a25 < 36ac05f7cfd59d90c597071304b14e98090d5dd1Linux 6.12Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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