Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: nfc: nci: fix use of uninitialized memory in CORE_INIT_RSP parsing nci_core_init_rsp_packet_v1() and nci_core_init_rsp_packet_v2() parse the CORE_INIT_RSP packet without validating that the skb contains enough data. A malformed response (e.g. injected via virtual_ncidev) can declare a large num_supported_rf_interfaces while providing insufficient data, causing reads of uninitialized slab memory. This is later used in nci_init_complete_req(), triggering a KMSAN uninit-value warning. Add skb length checks before accessing packet fields: - Validate the skb has at least 1 byte for the status field. - Validate the skb can hold the fixed-size header before parsing. - In v2, bounds-check each variable-length rf_interface entry and its extension parameters within the parsing loop. - In v1, verify the skb is large enough for both the variable-length rf_interfaces array and the trailing rsp_2 structure.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected bcd684aace34fedbd473fbd9b21ed06b0c2d2212 before baed3fdf6ed2195c56f25ae18a086b938dcd3983; affected bcd684aace34fedbd473fbd9b21ed06b0c2d2212 before 2f434478771a4ebdd535033561c0590bcde39753; affected bcd684aace34fedbd473fbd9b21ed06b0c2d2212 before 5487f04c1ccbfa15aa6e531eb1ec9c9ec9c7bf31; affected bcd684aace34fedbd473fbd9b21ed06b0c2d2212 before bbe68e8249e2c76d65adfd9224fa95f1ca0fbe4e; affected bcd684aace34fedbd473fbd9b21ed06b0c2d2212 before 4f0483bbcdaccc9d4aee30df7351863334cecfa7; affected bcd684aace34fedbd473fbd9b21ed06b0c2d2212 before 7d44b897bff84edcd4814899314d661ad4956a8e; affected bcd684aace34fedbd473fbd9b21ed06b0c2d2212 before d56575a2595ee1f597f39e8a1cfb67ed3501678d |
| Linux / Linux | affected 5.11; unaffected 0 before 5.11; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/baed3fdf6ed2195c56f25ae18a086b938dcd3983
- https://git.kernel.org/stable/c/2f434478771a4ebdd535033561c0590bcde39753
- https://git.kernel.org/stable/c/5487f04c1ccbfa15aa6e531eb1ec9c9ec9c7bf31
- https://git.kernel.org/stable/c/bbe68e8249e2c76d65adfd9224fa95f1ca0fbe4e
- https://git.kernel.org/stable/c/4f0483bbcdaccc9d4aee30df7351863334cecfa7
- https://git.kernel.org/stable/c/7d44b897bff84edcd4814899314d661ad4956a8e
- https://git.kernel.org/stable/c/d56575a2595ee1f597f39e8a1cfb67ed3501678d