critical CVSS 9.8

CVE-2022-48716·Kernel vulnerability

In the Linux kernel, the following vulnerability has been resolved: ASoC: codecs: wcd938x: fix incorrect used of portid Mixer controls have the channel id in mixer->reg, which is not same as port id. port id should be derived from chan_info array. So fix this. Without this, its possible that we could corrupt struct wcd938x_sdw_priv by accessing port_map array out of range with channel id instead of port id.

Severity
critical
Software
Kernel
Fixed in
5.16.8
Published
2024-06-20

Affected versions

From: 5.16

Until: 5.16.8

Fixed in: 5.16.8

How to fix this CVE

Update your Linux kernel to version 5.16.8 or later to resolve a critical memory corruption vulnerability in the WCD938x audio codec driver. The vulnerability stems from incorrect port ID mapping in mixer controls, which could allow out-of-bounds array access and kernel memory corruption. Systems running kernel versions 5.16 through 5.16.7 should prioritize this patch immediately.

sudo dnf update kernel kernel-devel

Defensia detects this vulnerability

How to check if you are affected

  1. Check your current kernel version with: uname -r
  2. Verify if your system uses the WCD938x audio codec by running: lspci | grep -i audio or cat /proc/asound/cards
  3. Review kernel logs for audio subsystem errors or crashes: dmesg | grep -i wcd938x
  4. Confirm the fix by comparing your kernel version against 5.16.8 or later: uname -r | awk -F. '{print ($1*10000 + $2*100 + $3)}' and verify it returns a value >= 51608

FAQ

What is CVE-2022-48716?

This vulnerability affects the Linux kernel's WCD938x audio codec driver, where mixer control channel IDs are incorrectly used as port IDs. This causes out-of-bounds memory access in the port_map array, potentially corrupting kernel data structures.

Is CVE-2022-48716 being actively exploited?

No, this vulnerability is not listed on the CISA KEV catalog and has no known public exploits. However, its critical CVSS score (9.8) warrants immediate patching due to potential for local privilege escalation.

What versions of Kernel are affected by CVE-2022-48716?

Linux kernel versions 5.16 through 5.16.7 are vulnerable. The fix was introduced in kernel 5.16.8.

How do I check if my server is vulnerable to CVE-2022-48716?

Run 'uname -r' to retrieve your kernel version. If it reports 5.16.0 through 5.16.7 and your system has a WCD938x audio codec (verified via 'cat /proc/asound/cards'), your system is vulnerable.

Does Defensia detect CVE-2022-48716?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If Linux kernel is installed on a monitored server, CVE-2022-48716 will appear in your dashboard with remediation steps.

Related Kernel CVEs

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CVE-2024-39462CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: clk: bcm: dvp: Assign ->num before accessing ->hws Commit f316cdff8d67 ("clk: Annotate struct clk_hw_onecell_data with __counted_by") annotated the hws member of 'struct clk_hw_onecell_data' with __counted_by, which informs the bounds sanitizer about the number of elements in hws, so that it can warn when hws is accessed out of bounds. As noted in that change, the __counted_by member must be initialized with the number of elements before the first array access happens, otherwise there will be a warning from each access prior to the initialization because the number of elements is zero. This occurs in clk_dvp_probe() due to ->num being assigned after ->hws has been accessed: UBSAN: array-index-out-of-bounds in drivers/clk/bcm/clk-bcm2711-dvp.c:59:2 index 0 is out of range for type 'struct clk_hw *[] __counted_by(num)' (aka 'struct clk_hw *[]') Move the ->num initialization to before the first access of ->hws, which clears up the warning.
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-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.

References

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