high CVSS 7.8

CVE-2022-48632·Kernel vulnerability

In the Linux kernel, the following vulnerability has been resolved: i2c: mlxbf: prevent stack overflow in mlxbf_i2c_smbus_start_transaction() memcpy() is called in a loop while 'operation->length' upper bound is not checked and 'data_idx' also increments.

Severity
high
Software
Kernel
Fixed in
5.19.12
Published
2024-04-28

Affected versions

From: 5.16

Until: 5.19.12

Fixed in: 5.19.12

How to fix this CVE

Update your Linux kernel to version 5.19.12 or later to patch a stack overflow vulnerability in the Mellanox BlueField I2C driver. This vulnerability could allow a local attacker with user privileges to corrupt kernel memory and potentially escalate privileges. Apply the kernel update through your distribution's package manager and reboot to activate the patched kernel.

sudo dnf update kernel && sudo reboot

Defensia detects this vulnerability

How to check if you are affected

  1. Check the running kernel version with: uname -r — ensure it is 5.19.12 or later
  2. Verify if Mellanox BlueField I2C hardware is present by running: lsmod | grep mlxbf_i2c — if no output, this hardware is not actively used
  3. Search system logs for I2C transaction errors with: journalctl -u kernel | grep -i 'mlxbf\|i2c.*error'
  4. Confirm the fix by checking kernel config: grep CONFIG_I2C_MLXBF /boot/config-$(uname -r) — should show CONFIG_I2C_MLXBF=m or =y

FAQ

What is CVE-2022-48632?

CVE-2022-48632 is a stack overflow flaw in the Mellanox BlueField I2C driver that occurs when handling SMBus transactions with unchecked buffer lengths, allowing local privilege escalation.

Is CVE-2022-48632 being actively exploited?

No, this vulnerability is not listed in CISA's Known Exploited Vulnerabilities catalog and no public exploits are available, though it remains a high-severity risk for systems using the affected I2C driver.

What versions of Kernel are affected by CVE-2022-48632?

Linux kernel versions 5.16 through 5.19.11 are vulnerable; the fix is included in 5.19.12 and later versions.

How do I check if my server is vulnerable to CVE-2022-48632?

Run 'uname -r' to check your kernel version — if it shows 5.16 through 5.19.11, you are vulnerable. Additionally, check 'lsmod | grep mlxbf_i2c' to see if the affected driver is loaded on your system.

Does Defensia detect CVE-2022-48632?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If Kernel is installed on a monitored server, CVE-2022-48632 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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