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Linux KernelOperating system · Linux

CVE-2024-50107

MEDIUM · 5.5 CVSS v3.1 Published 2024-11-05
Fix available
A fix is available. Upgrade to 6.11.6 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: platform/x86/intel/pmc: Fix pmc_core_iounmap to call iounmap for valid addresses Commit 50c6dbdfd16e ("x86/ioremap: Improve iounmap() address range checks") introduces a WARN when adrress ranges of iounmap are invalid. On Thinkpad P1 Gen 7 (Meteor Lake-P) this caused the following warning to appear: WARNING: CPU: 7 PID: 713 at arch/x86/mm/ioremap.c:461 iounmap+0x58/0x1f0 Modules linked in: rfkill(+) snd_timer(+) fjes(+) snd soundcore intel_pmc_core(+) int3403_thermal(+) int340x_thermal_zone intel_vsec pmt_telemetry acpi_pad pmt_class acpi_tad int3400_thermal acpi_thermal_rel joydev loop nfnetlink zram xe drm_suballoc_helper nouveau i915 mxm_wmi drm_ttm_helper gpu_sched drm_gpuvm drm_exec drm_buddy i2c_algo_bit crct10dif_pclmul crc32_pclmul ttm crc32c_intel polyval_clmulni rtsx_pci_sdmmc ucsi_acpi polyval_generic mmc_core hid_multitouch drm_display_helper ghash_clmulni_intel typec_ucsi nvme sha512_ssse3 video sha256_ssse3 nvme_core intel_vpu sha1_ssse3 rtsx_pci cec typec nvme_auth i2c_hid_acpi i2c_hid wmi pinctrl_meteorlake serio_raw ip6_tables ip_tables fuse CPU: 7 UID: 0 PID: 713 Comm: (udev-worker) Not tainted 6.12.0-rc2iounmap+ #42 Hardware name: LENOVO 21KWCTO1WW/21KWCTO1WW, BIOS N48ET19W (1.06 ) 07/18/2024 RIP: 0010:iounmap+0x58/0x1f0 Code: 85 6a 01 00 00 48 8b 05 e6 e2 28 04 48 39 c5 72 19 eb 26 cc cc cc 48 ba 00 00 00 00 00 00 32 00 48 8d 44 02 ff 48 39 c5 72 23 <0f> 0b 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc 48 ba 00 00 00 00 00 RSP: 0018:ffff888131eff038 EFLAGS: 00010207 RAX: ffffc90000000000 RBX: 0000000000000000 RCX: ffff888e33b80000 RDX: dffffc0000000000 RSI: ffff888e33bc29c0 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffff8881598a8000 R09: ffff888e2ccedc10 R10: 0000000000000003 R11: ffffffffb3367634 R12: 00000000fe000000 R13: ffff888101d0da28 R14: ffffffffc2e437e0 R15: ffff888110b03b28 FS: 00007f3c1d4b3980(0000) GS:ffff888e33b80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005651cfc93578 CR3: 0000000124e4c002 CR4: 0000000000f70ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff07f0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: <TASK> ? __warn.cold+0xb6/0x176 ? iounmap+0x58/0x1f0 ? report_bug+0x1f4/0x2b0 ? handle_bug+0x58/0x90 ? exc_invalid_op+0x17/0x40 ? asm_exc_invalid_op+0x1a/0x20 ? iounmap+0x58/0x1f0 pmc_core_ssram_get_pmc+0x477/0x6c0 [intel_pmc_core] ? __pfx_pmc_core_ssram_get_pmc+0x10/0x10 [intel_pmc_core] ? __pfx_do_pci_enable_device+0x10/0x10 ? pci_wait_for_pending+0x60/0x110 ? pci_enable_device_flags+0x1e3/0x2e0 ? __pfx_mtl_core_init+0x10/0x10 [intel_pmc_core] pmc_core_ssram_init+0x7f/0x110 [intel_pmc_core] mtl_core_init+0xda/0x130 [intel_pmc_core] ? __mutex_init+0xb9/0x130 pmc_core_probe+0x27e/0x10b0 [intel_pmc_core] ? _raw_spin_lock_irqsave+0x96/0xf0 ? __pfx_pmc_core_probe+0x10/0x10 [intel_pmc_core] ? __pfx_mutex_unlock+0x10/0x10 ? __pfx_mutex_lock+0x10/0x10 ? device_pm_check_callbacks+0x82/0x370 ? acpi_dev_pm_attach+0x234/0x2b0 platform_probe+0x9f/0x150 really_probe+0x1e0/0x8a0 __driver_probe_device+0x18c/0x370 ? __pfx___driver_attach+0x10/0x10 driver_probe_device+0x4a/0x120 __driver_attach+0x190/0x4a0 ? __pfx___driver_attach+0x10/0x10 bus_for_each_dev+0x103/0x180 ? __pfx_bus_for_each_dev+0x10/0x10 ? klist_add_tail+0x136/0x270 bus_add_driver+0x2fc/0x540 driver_register+0x1a5/0x360 ? __pfx_pmc_core_driver_init+0x10/0x10 [intel_pmc_core] do_one_initcall+0xa4/0x380 ? __pfx_do_one_initcall+0x10/0x10 ? kasan_unpoison+0x44/0x70 do_init_module+0x296/0x800 load_module+0x5090/0x6ce0 ? __pfx_load_module+0x10/0x10 ? ima_post_read_file+0x193/0x200 ? __pfx_ima_post_read_file+0x10/0x10 ? rw_verify_area+0x152/0x4c0 ? kernel_read_file+0x257/0x750 ? __pfx_kernel_read_file+0x10/0x10 ? __pfx_filemap_get_read_batch+0x10/0x10 ? init_module_from_file+0xd1/0x130 init_module_from_file+0xd1/0x130 ? __pfx_init_module_from_file+0x10/0 ---truncated---

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:>= 6.8, < 6.11.6= 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 6.11.6 or later
Fixed in 6.11.6
Vendor patch git.kernel.org →
Recommended fix High confidence

Linux Kernel 6.11.6+ or 6.12.y (next stable point release after 6.12)

  1. Identify the current running kernel version using 'uname -r'
  2. For systems running kernel 6.11.x: upgrade to kernel version 6.11.6 or later (e.g., 6.11.7, 6.11.8, etc.)
  3. For systems running kernel 6.12.x: upgrade to the next stable 6.12.y release (after 6.12) that includes the fix
  4. Reboot the system into the new kernel using 'sudo reboot' after installing the update
  5. Verify the fix is applied by checking the kernel version with 'uname -r' and confirming the system no longer produces the iounmap warning
Caveat Kernel upgrades may require system reboot and could have compatibility implications with proprietary kernel modules or custom configurations; test in non-production environment first

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-2024-50107 in production — separate from our analysis above.

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