high CVSS 7.8

CVE-2022-48927·Kernel vulnerability

In the Linux kernel, the following vulnerability has been resolved: iio: adc: tsc2046: fix memory corruption by preventing array overflow On one side we have indio_dev->num_channels includes all physical channels + timestamp channel. On other side we have an array allocated only for physical channels. So, fix memory corruption by ARRAY_SIZE() instead of num_channels variable. Note the first case is a cleanup rather than a fix as the software timestamp channel bit in active_scanmask is never set by the IIO core.

Severity
high
Software
Kernel
Fixed in
5.16.12
Published
2024-08-22

Affected versions

From: 5.16

Until: 5.16.12

Fixed in: 5.16.12

How to fix this CVE

Update your Linux kernel to version 5.16.12 or later to patch an array overflow vulnerability in the TSC2046 ADC driver that could lead to memory corruption. Systems running kernel versions 5.16 through 5.16.11 should apply this update immediately, particularly if the TSC2046 touch screen controller driver is in use. Reboot after applying the kernel update to activate the security fix.

sudo dnf update kernel

Defensia detects this vulnerability

How to check if you are affected

  1. Step 1: Check installed kernel version with `uname -r` and verify it is not in the 5.16.0 to 5.16.11 range
  2. Step 2: Confirm TSC2046 driver is loaded by running `lsmod | grep tsc2046` or checking `cat /proc/modules | grep tsc2046`
  3. Step 3: Review kernel logs for memory corruption indicators with `sudo dmesg | grep -i 'memory\|corruption\|overflow'` and `sudo journalctl -xe | grep -i 'tsc2046\|adc'`
  4. Step 4: After patching, verify the new kernel version is active with `uname -r` and confirm it shows 5.16.12 or higher

FAQ

What is CVE-2022-48927?

This is a memory corruption vulnerability in the Linux kernel's TSC2046 ADC (analog-to-digital converter) driver caused by an array indexing error. The driver incorrectly uses the channel count variable which includes a timestamp channel, causing writes beyond the allocated array bounds.

Is CVE-2022-48927 being actively exploited?

No, this vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog and no public exploits are available. However, the high CVSS score of 7.8 warrants prompt patching.

What versions of Kernel are affected by CVE-2022-48927?

Linux kernel versions 5.16.0 through 5.16.11 are vulnerable. The fix is included in kernel 5.16.12 and later versions.

How do I check if my server is vulnerable to CVE-2022-48927?

Run `uname -r` to get your kernel version and compare against the vulnerable range 5.16.0–5.16.11. Additionally, check if TSC2046 is in use with `lsmod | grep tsc2046`.

Does Defensia detect CVE-2022-48927?

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-2022-48927 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.
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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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