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Linux KernelOperating system · Linux

CVE-2024-50077

MEDIUM · 5.5 CVSS v3.1 Published 2024-10-29
Fix available
A fix is available. Upgrade to 6.1.114 / 6.6.58 or later.
See remediation →
57/100
Remediation priority · Elevated
Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Linux KernelOperating system
Affected:>= 6.0, < 6.1.114>= 6.2, < 6.6.58>= 6.7, < 6.11.5= 6.12

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 6.1.114 / 6.6.58 / 6.11.5 or later
Fixed in 6.1.1146.6.586.11.5
Vendor patch git.kernel.org →
Recommended fix High confidence

6.1.114+ / 6.6.58+ / 6.11.5+ / 6.13+ (depending on kernel branch)

  1. Identify the current kernel version using 'uname -r' or 'cat /proc/version'
  2. Determine which kernel branch you are running (e.g., 6.1.x, 6.6.x, 6.11.x, or 6.12)
  3. Upgrade to a fixed kernel version: for 6.1.x series upgrade to >=6.1.114, for 6.6.x series upgrade to >=6.6.58, for 6.11.x series upgrade to >=6.11.5, for 6.12 upgrade to >=6.13
  4. On Debian-based systems: 'sudo apt update && sudo apt upgrade linux-image-generic' or install specific version via 'apt install linux-image-<version>'
  5. On RHEL/CentOS: 'sudo yum update kernel' or 'sudo dnf update kernel'
  6. On Fedora: 'sudo dnf update kernel'
  7. Reboot the system to load the new kernel: 'sudo reboot'
  8. Verify the new kernel version after reboot with 'uname -r'
Caveat Kernel upgrades may require rebuild of out-of-tree modules; ensure compatible drivers/modules exist for the target version

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,600. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2024-50077 in production — separate from our analysis above.

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