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CVE-2024-50077— Bluetooth: ISO: Fix multiple init when debugfs is disabled

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于在ISO初始化时未正确处理调试文件系统，导致在模块卸载时出现双重初始化问题。

CVSS 7.8 · High EPSS 0.21% · P11

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux ccf74f2390d60a2f9a75ef496d2564abb478f46a< fa4b832c5a6ec35023a1b997cf658c436619c752 affected
ccf74f2390d60a2f9a75ef496d2564abb478f46a< 8fb8e912afb4c47dec12ea9a5853e7a8db95816f affected
ccf74f2390d60a2f9a75ef496d2564abb478f46a< adf1b179c2ff8073c24bf87e5a605fcc5a09798b affected
ccf74f2390d60a2f9a75ef496d2564abb478f46a< a9b7b535ba192c6b77e6c15a4c82d853163eab8c affected
6.0 affected
< 6.0 unaffected
6.1.114≤ 6.1.* unaffected
6.6.58≤ 6.6.* unaffected
… +2 more rows
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I. Basic Information for CVE-2024-50077

Vulnerability Information
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Vulnerability Title
Bluetooth: ISO: Fix multiple init when debugfs is disabled
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: Fix multiple init when debugfs is disabled If bt_debugfs is not created successfully, which happens if either CONFIG_DEBUG_FS or CONFIG_DEBUG_FS_ALLOW_ALL is unset, then iso_init() returns early and does not set iso_inited to true. This means that a subsequent call to iso_init() will result in duplicate calls to proto_register(), bt_sock_register(), etc. With CONFIG_LIST_HARDENED and CONFIG_BUG_ON_DATA_CORRUPTION enabled, the duplicate call to proto_register() triggers this BUG(): list_add double add: new=ffffffffc0b280d0, prev=ffffffffbab56250, next=ffffffffc0b280d0. ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:35! Oops: invalid opcode: 0000 [#1] PREEMPT SMP PTI CPU: 2 PID: 887 Comm: bluetoothd Not tainted 6.10.11-1-ao-desktop #1 RIP: 0010:__list_add_valid_or_report+0x9a/0xa0 ... __list_add_valid_or_report+0x9a/0xa0 proto_register+0x2b5/0x340 iso_init+0x23/0x150 [bluetooth] set_iso_socket_func+0x68/0x1b0 [bluetooth] kmem_cache_free+0x308/0x330 hci_sock_sendmsg+0x990/0x9e0 [bluetooth] __sock_sendmsg+0x7b/0x80 sock_write_iter+0x9a/0x110 do_iter_readv_writev+0x11d/0x220 vfs_writev+0x180/0x3e0 do_writev+0xca/0x100 ... This change removes the early return. The check for iso_debugfs being NULL was unnecessary, it is always NULL when iso_inited is false.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于在ISO初始化时未正确处理调试文件系统，导致在模块卸载时出现双重初始化问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux ccf74f2390d60a2f9a75ef496d2564abb478f46a ~ fa4b832c5a6ec35023a1b997cf658c436619c752 -
Linux Linux 6.0 -

II. Public POCs for CVE-2024-50077

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III. Intelligence Information for CVE-2024-50077

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Patches & Fixes for CVE-2024-50077 (4)

Same Patch Batch · Linux · 2024-10-29 · 21 CVEs total

CVE-2024-50086 9.8 CRITICAL ksmbd: fix user-after-free from session log off
CVE-2024-50085 9.8 CRITICAL mptcp: pm: fix UaF read in mptcp_pm_nl_rm_addr_or_subflow
CVE-2024-50075 8.0 HIGH xhci: tegra: fix checked USB2 port number
CVE-2024-50087 7.8 HIGH btrfs: fix uninitialized pointer free on read_alloc_one_name() error
CVE-2024-50073 7.8 HIGH tty: n_gsm: Fix use-after-free in gsm_cleanup_mux
CVE-2024-50074 7.8 HIGH parport: Proper fix for array out-of-bounds access
CVE-2024-50078 7.8 HIGH Bluetooth: Call iso_exit() on module unload
CVE-2024-50082 7.8 HIGH blk-rq-qos: fix crash on rq_qos_wait vs. rq_qos_wake_function race
CVE-2024-50088 7.8 HIGH btrfs: fix uninitialized pointer free in add_inode_ref()
CVE-2024-50081 blk-mq: setup queue ->tag_set before initializing hctx
CVE-2024-50080 ublk: don't allow user copy for unprivileged device
CVE-2024-50079 io_uring/sqpoll: ensure task state is TASK_RUNNING when running task_work
CVE-2024-50076 vt: prevent kernel-infoleak in con_font_get()
CVE-2024-50083 tcp: fix mptcp DSS corruption due to large pmtu xmit
CVE-2024-50084 net: microchip: vcap api: Fix memory leaks in vcap_api_encode_rule_test()
CVE-2024-50072 x86/bugs: Use code segment selector for VERW operand
CVE-2024-50071 pinctrl: nuvoton: fix a double free in ma35_pinctrl_dt_node_to_map_func()
CVE-2024-50070 pinctrl: stm32: check devm_kasprintf() returned value
CVE-2024-50069 pinctrl: apple: check devm_kasprintf() returned value
CVE-2024-50068 mm/damon/tests/sysfs-kunit.h: fix memory leak in damon_sysfs_test_add_targets()

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-50077

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