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Linux KernelOperating system · Linux

CVE-2024-57917

HIGH · 7.8 CVSS v3.1 Published 2025-01-19
Fix available
A fix is available. Upgrade to 5.15.177 / 6.1.125 or later.
See remediation →
80/100
Remediation priority · High
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: topology: Keep the cpumask unchanged when printing cpumap During fuzz testing, the following warning was discovered: different return values (15 and 11) from vsnprintf("%*pbl ", ...) test:keyward is WARNING in kvasprintf WARNING: CPU: 55 PID: 1168477 at lib/kasprintf.c:30 kvasprintf+0x121/0x130 Call Trace: kvasprintf+0x121/0x130 kasprintf+0xa6/0xe0 bitmap_print_to_buf+0x89/0x100 core_siblings_list_read+0x7e/0xb0 kernfs_file_read_iter+0x15b/0x270 new_sync_read+0x153/0x260 vfs_read+0x215/0x290 ksys_read+0xb9/0x160 do_syscall_64+0x56/0x100 entry_SYSCALL_64_after_hwframe+0x78/0xe2 The call trace shows that kvasprintf() reported this warning during the printing of core_siblings_list. kvasprintf() has several steps: (1) First, calculate the length of the resulting formatted string. (2) Allocate a buffer based on the returned length. (3) Then, perform the actual string formatting. (4) Check whether the lengths of the formatted strings returned in steps (1) and (2) are consistent. If the core_cpumask is modified between steps (1) and (3), the lengths obtained in these two steps may not match. Indeed our test includes cpu hotplugging, which should modify core_cpumask while printing. To fix this issue, cache the cpumask into a temporary variable before calling cpumap_print_{list, cpumask}_to_buf(), to keep it unchanged during the printing process.

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:>= 5.15, < 5.15.177>= 5.16, < 6.1.125>= 6.2, < 6.6.72>= 6.7, < 6.12.10= 6.13

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
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 5.15.177 / 6.1.125 / 6.6.72 or later
Fixed in 5.15.1776.1.1256.6.72
Vendor patch git.kernel.org →
Recommended fix High confidence

5.15.177, 6.1.125, 6.6.72, or 6.12.10 depending on current branch

  1. 1. Identify the currently running kernel version using `uname -r`
  2. 2. Determine which branch of the kernel is in use (e.g., 5.15.x, 6.1.x, 6.2.x, 6.7.x)
  3. 3. For the 5.15.x branch: upgrade to kernel version 5.15.177 or later
  4. 4. For the 5.16.x branch: upgrade to kernel version 6.1.125 or later (note: 5.16 is EOL, migrate to 6.1.x LTS)
  5. 5. For the 6.2.x branch: upgrade to kernel version 6.6.72 or later
  6. 6. For the 6.7.x branch: upgrade to kernel version 6.12.10 or later
  7. 7. Alternatively, apply the vendor patch commit 1c7818e2746e747838a3de1687e89eac7b947f08 to the kernel source code and rebuild
  8. 8. After upgrade/patch, reboot the system to load the fixed kernel
Caveat Kernel upgrades may introduce regression or require rebuild of out-of-tree modules; ensure driver compatibility before upgrading

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 $1,950. 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-2024-57917 in production — separate from our analysis above.

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