CVE-2026-64573: linux
Vulnerability summary
CVE-2026-64573 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 4.8% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 28 · Related 26Timeline
- 05-08-2026PublishedVulnerability first disclosed.
- 19-08-2026Last modifiedVulnerability information updated.
Description
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)
CVSS metrics
Risk metrics not yet published.
EPSS trend
Probability
0.16%
Chance of exploitation in the next 30 days
Percentile
5%
Versus all other CVEs
30-day change
0.00 pp
From 0.16% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Ubuntu157 products
- linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 6.8.0-147.147 | < 7.0.0-38.38
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 6.8.0-1067.70 | < 7.0.0-1014.14
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian2 products
- linux< 6.1.187-1 | < 6.12.101-1 | < 7.1.6-1
- linux-6.12< 6.12.101-1~deb12u1
Linux1 product
- linux≥ ed53949cc92e28aaa3463d246942bda1fbb7f307, < a7ee11441d71ab036a705d110a415421f5a4a898 | ≥ 1caceadfb50432dbf6d808796cb6c34ebb6d662c, < 5d34e537755d2f9eba2d4e54d70126f987ef20b4 | ≥ 427281f9498ed614f9aabc80e46ec077c487da6d, < 70354dbb5f72d9a76da7b031de3cbaf6c7d8fc24 | ≥ 2e4edfa1e2bd821a317e7d006517dcf2f3fac68d, < 59fd2f075bca94f030c7c78e94878ea0803d7690 | ≥ 2e4edfa1e2bd821a317e7d006517dcf2f3fac68d, < a087ed960fce54e9302796229e9d545bbc9bcd4a | ≥ 2e4edfa1e2bd821a317e7d006517dcf2f3fac68d, < 4fcfb5b2c736785464ff9745f94c6726c5ee2d85 | ≥ 2e4edfa1e2bd821a317e7d006517dcf2f3fac68d, < c90164ca0f7036942ba088eb7ea8d3f6c2352020 | 02f05ed44b71152d5e11d29be28aed91c0489b4e | ≥ 5.15.159, < 5.15.216 | ≥ 6.1.91, < 6.1.183 | ≥ 6.6.31, < 6.6.148 | ≥ 6.8.10, < 6.9 | 6.9
3 vendors · 160 products
