Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: qca: fix NVM tag length underflow in TLV parser In the TLV_TYPE_NVM branch of qca_tlv_check_data() the tag loop bound is "while (idx < length - sizeof(struct tlv_type_nvm))". "length" is a signed int from the firmware TLV header and sizeof(struct tlv_type_nvm) is a size_t (12), so "length" is converted to size_t and any firmware-supplied "length" < 12 makes the subtraction wrap to a huge value. The loop body then reads a 12-byte struct tlv_type_nvm past the end of the short vmalloc'd firmware buffer (and the EDL_TAG_ID_* handlers can write past it). Rewrite the bound as "idx + sizeof(struct tlv_type_nvm) <= length"; both operands are non-negative, so it no longer underflows and a "length" too small for one record correctly skips the loop. BUG: KASAN: vmalloc-out-of-bounds in qca_download_firmware.isra.0 (drivers/bluetooth/btqca.c:421) Read of size 2 at addr ffffc900000e5004 by task kworker/u9:0/52 Workqueue: hci0 hci_power_on Call Trace: ... kasan_report (mm/kasan/report.c:595) qca_download_firmware.isra.0 (drivers/bluetooth/btqca.c:421 drivers/bluetooth/btqca.c:617) qca_uart_setup (drivers/bluetooth/btqca.c:948) qca_setup (drivers/bluetooth/hci_qca.c:2029) hci_uart_setup (drivers/bluetooth/hci_ldisc.c:438) hci_dev_open_sync (net/bluetooth/hci_sync.c:5227) hci_power_on (net/bluetooth/hci_core.c:920) process_one_work (kernel/workqueue.c:3322) worker_thread (kernel/workqueue.c:3486) kthread (kernel/kthread.c:436) ret_from_fork (arch/x86/kernel/process.c:158) ret_from_fork_asm (arch/x86/entry/entry_64.S:245)
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected ed53949cc92e28aaa3463d246942bda1fbb7f307 before a7ee11441d71ab036a705d110a415421f5a4a898; affected 1caceadfb50432dbf6d808796cb6c34ebb6d662c before 5d34e537755d2f9eba2d4e54d70126f987ef20b4; affected 427281f9498ed614f9aabc80e46ec077c487da6d before 70354dbb5f72d9a76da7b031de3cbaf6c7d8fc24; affected 2e4edfa1e2bd821a317e7d006517dcf2f3fac68d before 59fd2f075bca94f030c7c78e94878ea0803d7690; affected 2e4edfa1e2bd821a317e7d006517dcf2f3fac68d before a087ed960fce54e9302796229e9d545bbc9bcd4a; affected 2e4edfa1e2bd821a317e7d006517dcf2f3fac68d before 4fcfb5b2c736785464ff9745f94c6726c5ee2d85; affected 2e4edfa1e2bd821a317e7d006517dcf2f3fac68d before c90164ca0f7036942ba088eb7ea8d3f6c2352020; affected 02f05ed44b71152d5e11d29be28aed91c0489b4e; affected 5.15.159 before 5.15.216; affected 6.1.91 before 6.1.183; affected 6.6.31 before 6.6.148; affected 6.8.10 before 6.9 |
| Linux / Linux | affected 6.9; unaffected 0 before 6.9; unaffected 5.15.216 through 5.15.*; unaffected 6.1.183 through 6.1.*; unaffected 6.6.148 through 6.6.*; unaffected 6.12.101 through 6.12.*; unaffected 6.18.42 through 6.18.*; unaffected 7.1.6 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a7ee11441d71ab036a705d110a415421f5a4a898
- https://git.kernel.org/stable/c/5d34e537755d2f9eba2d4e54d70126f987ef20b4
- https://git.kernel.org/stable/c/70354dbb5f72d9a76da7b031de3cbaf6c7d8fc24
- https://git.kernel.org/stable/c/59fd2f075bca94f030c7c78e94878ea0803d7690
- https://git.kernel.org/stable/c/a087ed960fce54e9302796229e9d545bbc9bcd4a
- https://git.kernel.org/stable/c/4fcfb5b2c736785464ff9745f94c6726c5ee2d85
- https://git.kernel.org/stable/c/c90164ca0f7036942ba088eb7ea8d3f6c2352020