high CVSS 7.8 EPSS <0.1%

CVE-2024-57998·Kernel vulnerability

In the Linux kernel, the following vulnerability has been resolved: OPP: add index check to assert to avoid buffer overflow in _read_freq() Pass the freq index to the assert function to make sure we do not read a freq out of the opp->rates[] table when called from the indexed variants: dev_pm_opp_find_freq_exact_indexed() or dev_pm_opp_find_freq_ceil/floor_indexed(). Add a secondary parameter to the assert function, unused for assert_single_clk() then add assert_clk_index() which will check for the clock index when called from the _indexed() find functions.

Severity
high
Software
Kernel
Fixed in
6.13.2
Published

How likely is exploitation

FIRST's Exploit Prediction Scoring System puts the probability of this CVE being exploited in the next 30 days at <0.1% — higher than 10% of all published CVEs. EPSS is an independent forecast of exploitation, not a severity rating: it says nothing about how much damage a successful attack does, which is what a CVSS score measures.

Read the two together. CVE-2024-57998 scores 7.8 on CVSS, so a successful attack would be serious — but at <0.1%, almost nobody is currently attempting it. That is a different situation from a flaw under mass exploitation, and it is usually the difference between patching on your next maintenance window and patching tonight.

Affected versions

From: 6.13

Until: 6.13.2

Fixed in: 6.13.2

How to fix this CVE

Update your Linux kernel to version 6.13.2 or later to patch a buffer overflow vulnerability in the OPP (Operating Performance Points) frequency lookup functions. The vulnerability exists in indexed frequency-finding operations that fail to validate array bounds, potentially allowing out-of-bounds memory reads. Apply kernel updates through your distribution's package manager and reboot your system to activate the patched kernel.

sudo dnf check-update kernel && sudo dnf update kernel && sudo reboot

Defensia detects this vulnerability

How to check if you are affected

  1. Check your current kernel version with: uname -r — compare the output against the affected range 6.13.0 through 6.13.1
  2. Verify OPP support in your kernel by checking: grep -i 'CONFIG_PM_OPP' /boot/config-$(uname -r) — if set to 'y', the vulnerable code path may be present
  3. Search kernel logs for OPP-related warnings: sudo journalctl -b | grep -i 'opp\|freq' — look for memory access anomalies or assertion failures
  4. Confirm the patch has been applied by checking kernel version with uname -r — should show 6.13.2 or later

FAQ

What is CVE-2024-57998?

A buffer overflow vulnerability in the Linux kernel's OPP (Operating Performance Points) subsystem where frequency lookup operations using indexed variants fail to validate array bounds before accessing the opp->rates[] table, potentially allowing out-of-bounds memory reads.

Is CVE-2024-57998 being actively exploited?

No, there is no evidence of active exploitation or public exploits available for this vulnerability at this time.

What versions of Kernel are affected by CVE-2024-57998?

Linux kernel versions 6.13.0 through 6.13.1 are affected. Version 6.13.2 and later contain the fix.

How do I check if my server is vulnerable to CVE-2024-57998?

Run 'uname -r' and check if the output shows kernel version 6.13.0 or 6.13.1. If so, your system is vulnerable and requires a kernel update to 6.13.2 or later.

Does Defensia detect CVE-2024-57998?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If the Linux kernel is installed on a monitored server, CVE-2024-57998 will appear in your dashboard with remediation steps.

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References

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