Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 3f52c2cb7e3ada37513dabb69a22cf917dba754f before 20a57de2e79b797ed75382659d52bf4c7d9cb446; affected 3f52c2cb7e3ada37513dabb69a22cf917dba754f before e4ab0fd1c91882f2a7846b1817781c8741f7f315; affected 3f52c2cb7e3ada37513dabb69a22cf917dba754f before d8c2aa3c4a1ec530a485e46a1c4f1a118bb00156; affected 3f52c2cb7e3ada37513dabb69a22cf917dba754f before 7c31f7a599cf00fad3c204092a91a924126c67e4; affected 3f52c2cb7e3ada37513dabb69a22cf917dba754f before 6d931680a9851481c3243689488eafed08eeff71; affected 3f52c2cb7e3ada37513dabb69a22cf917dba754f before 09822d3d6f68a0cdc4626e0c507324a4927f55a9; affected 3f52c2cb7e3ada37513dabb69a22cf917dba754f before 5c14a19d5b1645cce1cb1252833d70b23635b632 |
| Linux / Linux | affected 5.11; unaffected 0 before 5.11; unaffected 5.15.209 through 5.15.*; unaffected 6.1.175 through 6.1.*; unaffected 6.6.136 through 6.6.*; unaffected 6.12.83 through 6.12.*; unaffected 6.18.24 through 6.18.*; unaffected 6.19.14 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/20a57de2e79b797ed75382659d52bf4c7d9cb446
- https://git.kernel.org/stable/c/e4ab0fd1c91882f2a7846b1817781c8741f7f315
- https://git.kernel.org/stable/c/d8c2aa3c4a1ec530a485e46a1c4f1a118bb00156
- https://git.kernel.org/stable/c/7c31f7a599cf00fad3c204092a91a924126c67e4
- https://git.kernel.org/stable/c/6d931680a9851481c3243689488eafed08eeff71
- https://git.kernel.org/stable/c/09822d3d6f68a0cdc4626e0c507324a4927f55a9
- https://git.kernel.org/stable/c/5c14a19d5b1645cce1cb1252833d70b23635b632