high CVSS 7.1

CVE-2022-48701·Kernel vulnerability

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Fix an out-of-bounds bug in __snd_usb_parse_audio_interface() There may be a bad USB audio device with a USB ID of (0x04fa, 0x4201) and the number of it's interfaces less than 4, an out-of-bounds read bug occurs when parsing the interface descriptor for this device. Fix this by checking the number of interfaces.

Severity
high
Software
Kernel
Fixed in
5.19.9
Published
2024-05-03

Affected versions

From: 5.16

Until: 5.19.9

Fixed in: 5.19.9

How to fix this CVE

Update your Linux kernel to version 5.19.9 or later to patch an out-of-bounds memory read vulnerability in USB audio device parsing. Systems running kernel versions 5.16 through 5.19.8 should prioritize this update immediately, as malformed USB audio devices can trigger kernel memory access violations. Reboot your system after applying the kernel update to ensure the patched version is active.

sudo dnf update kernel kernel-devel

Defensia detects this vulnerability

How to check if you are affected

  1. Run 'uname -r' to check your current kernel version and confirm if it falls within the vulnerable range (5.16 to 5.19.8)
  2. Execute 'lsusb' to identify all connected USB devices and note any audio devices with vendor ID 04fa and product ID 4201
  3. Check kernel logs for USB parsing errors with 'dmesg | grep -i "usb\|audio\|bounds"' to see if exploitation attempts or parsing failures have occurred
  4. After patching, verify the new kernel version with 'uname -r' and confirm it is 5.19.9 or later

FAQ

What is CVE-2022-48701?

This vulnerability affects the Linux kernel's USB audio interface parsing logic, where a specially crafted or malfunctioning USB audio device with fewer interfaces than expected can cause an out-of-bounds memory read when the kernel attempts to validate interface descriptors.

Is CVE-2022-48701 being actively exploited?

No, this CVE is not listed in CISA's Known Exploited Vulnerabilities catalog and no public exploits are currently available.

What versions of Kernel are affected by CVE-2022-48701?

Linux kernel versions 5.16 through 5.19.8 are vulnerable; kernel 5.19.9 and later versions contain the fix.

How do I check if my server is vulnerable to CVE-2022-48701?

Run 'uname -r' to obtain your kernel version; if the output shows a version between 5.16 and 5.19.8 (inclusive), your system is vulnerable.

Does Defensia detect CVE-2022-48701?

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-2022-48701 will appear in your dashboard with remediation steps.

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CVE-2026-52986CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_sip: don't use simple_strtoul Replace unsafe port parsing in epaddr_len(), ct_sip_parse_header_uri(), and ct_sip_parse_request() with a new sip_parse_port() helper that validates each digit against the buffer limit, eliminating the use of simple_strtoul() which assumes NUL-terminated strings. The previous code dereferenced pointers without bounds checks after sip_parse_addr() and relied on simple_strtoul() on non-NUL-terminated skb data. A port that reaches the buffer limit without a trailing character is also rejected as malformed. Also get rid of all simple_strtoul() usage in conntrack, prefer a stricter version instead. There are intentional changes: - Bail out if number is > UINT_MAX and indicate a failure, same for too long sequences. While we do accept 05535 as port 5535, we will not accept e.g. 'sip:10.0.0.1:005060'. While its syntactically valid under RFC 3261, we should restrict this to not waste cycles when presented with malformed packets with 64k '0' characters. - Force base 10 in ct_sip_parse_numerical_param(). This is used to fetch 'expire=' and 'rports='; both are expected to use base-10. - In nf_nat_sip.c, only accept the parsed value if its within the 1k-64k range. - epaddr_len now returns 0 if the port is invalid, as it already does for invalid ip addresses. This is intentional. nf_conntrack_sip performs lots of guesswork to find the right parts of the message to parse. Being stricter could break existing setups. Connection tracking helpers are designed to allow traffic to pass, not to block it. Based on an earlier patch from Jenny Guanni Qu <qguanni@gmail.com>.
CVE-2026-63993CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: vxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu() skb_tunnel_check_pmtu() can change skb->head. Reusing old_iph afer skb_tunnel_check_pmtu() can cause an UAF. Use instead ip_hdr(skb) as done in drivers/net/bareudp.c and drivers/net/geneve.c. Found by Sashiko.
CVE-2026-64046CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: net: tls: prevent chain-after-chain in plain text SG Sashiko points out that if end = 0 (start != 0) the current code will create a chain link to content type right after the wrap link: This would create a chain where the wrap link points directly to another chain link. The scatterlist API sg_next iterator does not recursively resolve consecutive chain links. meaning this is illegal input to crypto. The wrapping link is unnecessary if end = 0. end is the entry after the last one used so end = 0 means there's nothing pushed after the wrap: end start i v v v [ ]...[ ][ d ][ d ][ d ][ d ][rsv for wrap] Skip the wrapping in this case. TLS 1.3 can use the "wrapping slot" for it's chaining if end = 0. This avoids the chain-after-chain. Move the wrap chaining before marking END and chaining off content type, that feels like more logical ordering to me, but should not matter from functional perspective.
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References

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