high CVSS 7.8

CVE-2022-49581·Kernel vulnerability

In the Linux kernel, the following vulnerability has been resolved: be2net: Fix buffer overflow in be_get_module_eeprom be_cmd_read_port_transceiver_data assumes that it is given a buffer that is at least PAGE_DATA_LEN long, or twice that if the module supports SFF 8472. However, this is not always the case. Fix this by passing the desired offset and length to be_cmd_read_port_transceiver_data so that we only copy the bytes once.

Severity
high
Software
Kernel
Fixed in
5.18.15
Published
2025-02-26

Affected versions

From: 5.16

Until: 5.18.15

Fixed in: 5.18.15

How to fix this CVE

Update your Linux kernel to version 5.18.15 or later to remediate this buffer overflow vulnerability in the be2net driver's module EEPROM reading function. The vulnerability allows a local privileged attacker to trigger memory corruption by requesting transceiver data without proper buffer boundary validation. Apply the kernel update immediately to all affected systems running kernel versions 5.16 through 5.18.14.

sudo dnf update kernel kernel-devel

Defensia detects this vulnerability

How to check if you are affected

  1. Step 1: Check your current kernel version by running: uname -r
  2. Step 2: Verify if be2net driver is loaded on your system: lsmod | grep be2net
  3. Step 3: Search system logs for be_get_module_eeprom errors: grep -i 'be_get_module_eeprom\|be2net' /var/log/kern.log /var/log/messages
  4. Step 4: After patching, reboot and confirm the new kernel is running: uname -r (should show 5.18.15 or later)

FAQ

What is CVE-2022-49581?

This is a buffer overflow vulnerability in the Broadcom be2net network driver that occurs when the kernel reads module EEPROM data without properly validating buffer sizes, allowing local privileged users to cause memory corruption.

Is CVE-2022-49581 being actively exploited?

No, according to CISA KEV data, this vulnerability is not actively exploited in the wild. However, it requires local privilege to trigger, so patching remains important for systems with untrusted local users.

What versions of Kernel are affected by CVE-2022-49581?

Linux kernel versions 5.16 through 5.18.14 are vulnerable. Version 5.18.15 and later contain the fix.

How do I check if my server is vulnerable to CVE-2022-49581?

Run 'uname -r' to get your kernel version, then verify it is below 5.18.15. Additionally, confirm the be2net driver is present with 'lsmod | grep be2net' only on systems with Broadcom network adapters.

Does Defensia detect CVE-2022-49581?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If Kernel is installed on a monitored server, CVE-2022-49581 will appear in your dashboard with remediation steps.

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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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