CVE-2026-43098
5.5 MEDIUMIn the Linux kernel, the following vulnerability has been resolved: nfc: s3fwrn5: allocate rx skb before consuming bytes s3fwrn82_uart_...
Published: 2026-05-06 · Last updated: 2026-06-01
Severity and scoring
- CVSS
- 5.5 MEDIUM
- Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products
| Vendor | Product |
|---|---|
| linux | linux_kernel |
Description
In the Linux kernel, the following vulnerability has been resolved: nfc: s3fwrn5: allocate rx skb before consuming bytes s3fwrn82_uart_read() reports the number of accepted bytes to the serdev core. The current code consumes bytes into recv_skb and may already deliver a complete frame before allocating a fresh receive buffer. If that alloc_skb() fails, the callback returns 0 even though it has already consumed bytes, and it leaves recv_skb as NULL for the next receive callback. That breaks the receive_buf() accounting contract and can also lead to a NULL dereference on the next skb_put_u8(). Allocate the receive skb lazily before consuming the next byte instead. If allocation fails, return the number of bytes already accepted.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-43098
- [Patch]https://git.kernel.org/stable/c/09822d3d6f68a0cdc4626e0c507324a4927f55a9
- [Other]https://git.kernel.org/stable/c/20a57de2e79b797ed75382659d52bf4c7d9cb446
- [Patch]https://git.kernel.org/stable/c/5c14a19d5b1645cce1cb1252833d70b23635b632
- [Patch]https://git.kernel.org/stable/c/6d931680a9851481c3243689488eafed08eeff71
- [Patch]https://git.kernel.org/stable/c/7c31f7a599cf00fad3c204092a91a924126c67e4
- [Patch]https://git.kernel.org/stable/c/d8c2aa3c4a1ec530a485e46a1c4f1a118bb00156
- [Other]https://git.kernel.org/stable/c/e4ab0fd1c91882f2a7846b1817781c8741f7f315
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