Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: nfc: pn533: allocate rx skb before consuming bytes pn532_receive_buf() reports the number of accepted bytes to the serdev core. The current code consumes bytes into recv_skb and may already hand a complete frame to pn533_recv_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 c656aa4c27b17a8c70da223ed5ab42145800d6b5 before 2ca64fb7e2d2ae14619dd204d4f2f0a601f421fb; affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 before 8b71299d587d9e4c830c18afb884c80ddb30ad28; affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 before 16649adc2e19509104245ea1f349b629d858f11f; affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 before 07cb6c72e66ba548679f22ac29ad588da8999279; affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 before a9495069b43b8634c1ae0042e888766c34f66637; affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 before 21ae2cda66a55c759607bbf1d23cbaa42019d2de; affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 before 7e37da42eda45d7859d9273fc7e225d8df458038; affected c656aa4c27b17a8c70da223ed5ab42145800d6b5 before c71ba669b570c7b3f86ec875be222ea11dacb352 |
| Linux / Linux | affected 5.5; unaffected 0 before 5.5; unaffected 5.10.253 through 5.10.*; unaffected 5.15.203 through 5.15.*; unaffected 6.1.169 through 6.1.*; unaffected 6.6.135 through 6.6.*; unaffected 6.12.82 through 6.12.*; unaffected 6.18.23 through 6.18.*; unaffected 6.19.13 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/2ca64fb7e2d2ae14619dd204d4f2f0a601f421fb
- https://git.kernel.org/stable/c/8b71299d587d9e4c830c18afb884c80ddb30ad28
- https://git.kernel.org/stable/c/16649adc2e19509104245ea1f349b629d858f11f
- https://git.kernel.org/stable/c/07cb6c72e66ba548679f22ac29ad588da8999279
- https://git.kernel.org/stable/c/a9495069b43b8634c1ae0042e888766c34f66637
- https://git.kernel.org/stable/c/21ae2cda66a55c759607bbf1d23cbaa42019d2de
- https://git.kernel.org/stable/c/7e37da42eda45d7859d9273fc7e225d8df458038
- https://git.kernel.org/stable/c/c71ba669b570c7b3f86ec875be222ea11dacb352