Bluetooth: hci_sync: Serialize local codec list cleanup
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.1.189, 6.6, 6.6.158, 6.12.112, 6.18.54, and 1 more
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: Serialize local codec list cleanup hci_dev_close_sync() clears hdev->local_codecs after releasing hdev->lock. Codec list additions and both traversals in sco_sock_getsockopt() use that lock, but the close path does not. A close and BT_CODEC query can therefore interleave as follows: hci_dev_close_sync() sco_sock_getsockopt() hci_dev_lock() fetch codec entry hci_codec_list_clear() kfree(entry) read entry->id The reader then accesses an entry which the close path has freed. KASAN BUG: KASAN: slab-use-after-free in sco_sock_getsockopt+0xfa0/0xfe0 Read of size 1 at addr ffff8881001c3450 Call Trace: sco_sock_getsockopt+0xfa0/0xfe0 do_sock_getsockopt+0x537/0x7b0 __sys_getsockopt+0xf2/0x170 Allocated by task 92: hci_codec_list_add.isra.0+0x2c/0x440 hci_read_codec_capabilities+0x224/0x590 hci_read_supported_codecs+0x2c2/0x640 Freed by task 92: kfree+0x131/0x3c0 hci_codec_list_clear+0xd8/0x160 hci_dev_close_sync+0x92a/0xfa0 Take hdev->lock around the clear operation at its existing point in the close path. This makes the clear wait for active readers and prevents a new traversal until the list is empty without changing teardown ordering.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From 626535077ba9dc110787540d1fe24881094c15a1 · fixed in 9f407d52c0d881430d689836d3e7d32aa36f98b5; From b938790e70540bf4f2e653dcd74b232494d06c8f · fixed in 560ed4373c06a58123ecdf9ad5ecaddc87a73382; From b938790e70540bf4f2e653dcd74b232494d06c8f · fixed in 1ee0c5429dc4a92879bda2554b1bfd4abc6c587c; From b938790e70540bf4f2e653dcd74b232494d06c8f · fixed in 4dc1ae5ff75b17e17ec4b74b11cc4b0099e71e00; From b938790e70540bf4f2e653dcd74b232494d06c8f · fixed in 1276c2fafd18499769a28f96f45c5a76d6fc990e; From b938790e70540bf4f2e653dcd74b232494d06c8f · fixed in 9a10987a2f160a44a638c9a35994ca6e3089696e; From 6.1.57 · fixed in 6.1.189; From 6.5.7 · fixed in 6.6
- Linux Linux
6.6
- KernelLinux
fixed in 6.1.189; From 6.2.0 · fixed in 6.6.158; From 6.6.0 · fixed in 6.12.112; From 6.7.0 · fixed in 6.18.54; From 6.13.0 · fixed in 7.2.8