high CVSS 7.1

CVE-2022-49145·Kernel vulnerability

In the Linux kernel, the following vulnerability has been resolved: ACPI: CPPC: Avoid out of bounds access when parsing _CPC data If the NumEntries field in the _CPC return package is less than 2, do not attempt to access the "Revision" element of that package, because it may not be present then. BugLink: https://lore.kernel.org/lkml/20220322143534.GC32582@xsang-OptiPlex-9020/

Severity
high
Software
Kernel
Fixed in
5.17.2
Published
2025-02-26

Affected versions

From: 5.17

Until: 5.17.2

Fixed in: 5.17.2

How to fix this CVE

Update your Linux kernel to version 5.17.2 or later to patch a boundary condition in ACPI CPPC data parsing that could allow local privilege escalation. Systems running kernel versions 5.17.0 through 5.17.1 should prioritize this update, as the vulnerability permits out-of-bounds memory access when parsing malformed _CPC ACPI tables.

sudo dnf update kernel

Defensia detects this vulnerability

How to check if you are affected

  1. Check installed kernel version: uname -r — vulnerable if output shows 5.17.0 or 5.17.1
  2. Verify ACPI CPPC support: grep -i cppc /proc/cpuinfo — if present, ACPI CPPC parsing is active on this system
  3. Search kernel logs for ACPI parsing errors: sudo journalctl -b | grep -i 'acpi\|cppc\|boundary\|out of bounds'
  4. Confirm patch installation: uname -r should show 5.17.2 or higher; verify with sudo dmesg | grep -i 'acpi cppc' for clean startup

FAQ

What is CVE-2022-49145?

This vulnerability is a boundary check failure in the Linux kernel's ACPI CPPC (Collaborative Processor Performance Control) driver that permits a local attacker to read sensitive memory or trigger a denial of service by crafting a malformed _CPC ACPI table with fewer than 2 entries.

Is CVE-2022-49145 being actively exploited?

No, this CVE is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog and no public exploits are currently available, though the attack requires only local system access.

What versions of Kernel are affected by CVE-2022-49145?

Linux kernel versions 5.17.0 and 5.17.1 are affected. Kernel 5.17.2 and later versions include the fix.

How do I check if my server is vulnerable to CVE-2022-49145?

Run 'uname -r' and check if the output matches 5.17.0 or 5.17.1; if yes, your system is vulnerable and requires immediate kernel update to 5.17.2 or later.

Does Defensia detect CVE-2022-49145?

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-2022-49145 will appear in your dashboard with remediation steps.

Related Kernel CVEs

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CVE-2024-36031CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: keys: Fix overwrite of key expiration on instantiation The expiry time of a key is unconditionally overwritten during instantiation, defaulting to turn it permanent. This causes a problem for DNS resolution as the expiration set by user-space is overwritten to TIME64_MAX, disabling further DNS updates. Fix this by restoring the condition that key_set_expiry is only called when the pre-parser sets a specific expiry.
CVE-2024-38612CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: ipv6: sr: fix invalid unregister error path The error path of seg6_init() is wrong in case CONFIG_IPV6_SEG6_LWTUNNEL is not defined. In that case if seg6_hmac_init() fails, the genl_unregister_family() isn't called. This issue exist since commit 46738b1317e1 ("ipv6: sr: add option to control lwtunnel support"), and commit 5559cea2d5aa ("ipv6: sr: fix possible use-after-free and null-ptr-deref") replaced unregister_pernet_subsys() with genl_unregister_family() in this error path.
CVE-2024-38623CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: Use variable length array instead of fixed size Should fix smatch warning: ntfs_set_label() error: __builtin_memcpy() 'uni->name' too small (20 vs 256)
CVE-2021-47548CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: ethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port() The if statement: if (port >= DSAF_GE_NUM) return; limits the value of port less than DSAF_GE_NUM (i.e., 8). However, if the value of port is 6 or 7, an array overflow could occur: port_rst_off = dsaf_dev->mac_cb[port]->port_rst_off; because the length of dsaf_dev->mac_cb is DSAF_MAX_PORT_NUM (i.e., 6). To fix this possible array overflow, we first check port and if it is greater than or equal to DSAF_MAX_PORT_NUM, the function returns.

References

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