Description
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.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 4e893ca8117022de68ce1b61c0309e3d17bb8a25, < d19f98c79f1b7e09e4cdf5c20d626e571e487467; >= 4e893ca8117022de68ce1b61c0309e3d17bb8a25, < 64561afb42d8390695bf810d9bbd087cbca00291; >= 4e893ca8117022de68ce1b61c0309e3d17bb8a25, < 0a9750263ffacbbd2048a391fd4bd22e2146c57d; >= 4e893ca8117022de68ce1b61c0309e3d17bb8a25, < 6e4cf281558709b92ec2ca3054fe2ffc69266ef9; >= 4e893ca8117022de68ce1b61c0309e3d17bb8a25, < 36ac05f7cfd59d90c597071304b14e98090d5dd1; c57506918b078ecab7dedebef0f34dbc23ae2e46; >= 6.6.160, < 6.7 |
| Linux | Linux | 6.12 |
References
- https://git.kernel.org/stable/c/0a9750263ffacbbd2048a391fd4bd22e2146c57d
- https://git.kernel.org/stable/c/36ac05f7cfd59d90c597071304b14e98090d5dd1
- https://git.kernel.org/stable/c/64561afb42d8390695bf810d9bbd087cbca00291
- https://git.kernel.org/stable/c/6e4cf281558709b92ec2ca3054fe2ffc69266ef9
- https://git.kernel.org/stable/c/d19f98c79f1b7e09e4cdf5c20d626e571e487467
Timeline
- Published
- Sep 4, 2026
- Last modified
- Oct 21, 2026
- NVD status
- Received