high CVSS 7.8

CVE-2022-48951·Kernel vulnerability

In the Linux kernel, the following vulnerability has been resolved: ASoC: ops: Check bounds for second channel in snd_soc_put_volsw_sx() The bounds checks in snd_soc_put_volsw_sx() are only being applied to the first channel, meaning it is possible to write out of bounds values to the second channel in stereo controls. Add appropriate checks.

Severity
high
Software
Kernel
Fixed in
6.0.14
Published
2024-10-21

Affected versions

From: 5.16

Until: 6.0.14

Fixed in: 6.0.14

How to fix this CVE

Update your Linux kernel to version 6.0.14 or later to patch a bounds-checking vulnerability in the ASoC audio subsystem. This vulnerability affects stereo audio controls and could allow local privilege escalation through improper validation of the second audio channel parameter. Kernel versions 5.16 through 6.0.13 are vulnerable and require immediate patching.

sudo dnf update kernel kernel-devel

Defensia detects this vulnerability

How to check if you are affected

  1. Step 1: Check kernel version with `uname -r` and compare against vulnerable range (5.16.x to 6.0.13)
  2. Step 2: Verify ASoC audio drivers are loaded with `lsmod | grep snd` to confirm audio subsystem exposure
  3. Step 3: Search system logs for audio control errors with `grep -i 'snd_soc\|asoc' /var/log/kernel.log` or `journalctl -g snd_soc`
  4. Step 4: After patching, confirm kernel version with `uname -r` shows 6.0.14 or later, then verify audio controls function correctly with `amixer info`

FAQ

What is CVE-2022-48951?

CVE-2022-48951 is a local privilege escalation vulnerability in the Linux kernel's ASoC (ALSA System on Chip) audio driver that fails to properly validate bounds on stereo audio control parameters, allowing out-of-bounds writes to kernel memory.

Is CVE-2022-48951 being actively exploited?

No, CVE-2022-48951 is not listed on the CISA Known Exploited Vulnerabilities (KEV) catalog and no public exploits are currently available, but it should still be prioritized for patching due to its high CVSS score of 7.8.

What versions of Kernel are affected by CVE-2022-48951?

Linux kernel versions 5.16.x through 6.0.13 are vulnerable. The vulnerability is resolved in kernel 6.0.14 and all later versions.

How do I check if my server is vulnerable to CVE-2022-48951?

Run `uname -r` to retrieve your kernel version, then compare it against the vulnerable range (5.16.0 to 6.0.13); if your version falls within this range, your system is vulnerable.

Does Defensia detect CVE-2022-48951?

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-2022-48951 will appear in your dashboard with remediation steps.

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CVE-2026-64439CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: crypto: krb5 - filter out async aead implementations at alloc krb5_aead_encrypt(), krb5_aead_decrypt() in rfc3961_simplified.c and rfc8009_encrypt(), rfc8009_decrypt() in rfc8009_aes2.c set a NULL completion callback and treat any negative return from crypto_aead_{encrypt,decrypt}() as terminal, falling through to kfree_sensitive(buffer). When the encrypt_name resolves to an async AEAD instance the request returns -EINPROGRESS, the buffer is freed while the backend's worker still holds a pointer, and the worker dereferences the freed slab on completion. KASAN report under UML+SLUB with a synthetic async aead backend bound to krb5->encrypt_name: BUG: KASAN: slab-use-after-free in t5_stub_complete+0x7d/0xc7 The helpers were written synchronously, so filter the async instances out at allocation time instead of plumbing crypto_wait_req() through every call site. Reachable via net/rxrpc/rxgk.c, fs/afs/cm_security.c and net/ceph/crypto.c on systems with an async AEAD provider bound to the krb5 enctype name.
CVE-2026-64066CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: netfs: Fix netfs_read_to_pagecache() to pause on subreq failure Fix netfs_read_to_pagecache() so that it pauses the generation of new subrequests if an already-issued subrequest fails.
CVE-2026-64383CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in SMB2_flush() replay SMB2_flush() keeps its response buffer bookkeeping across replay attempts. If a replayable flush response is received and the retry then fails before cifs_send_recv() stores a replacement response, flush_exit will free the stale response pointer a second time. Reinitialize resp_buftype and rsp_iov at the top of the replay loop so cleanup only acts on response state produced by the current attempt. This fixes a double-free without changing replay handling for successful requests.
CVE-2026-64067CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: netfs: Fix missing barriers when accessing stream->subrequests locklessly The list of subrequests attached to stream->subrequests is accessed without locks by netfs_collect_read_results() and netfs_collect_write_results(), and then they access subreq->flags without taking a barrier after getting the subreq pointer from the list. Relatedly, the functions that build the list don't use any sort of write barrier when constructing the list to make sure that the NETFS_SREQ_IN_PROGRESS flag is perceived to be set first if no lock is taken. Fix this by: (1) Add a new list_add_tail_release() function that uses a release barrier to set the pointer to the new member of the list. (2) Add a new list_first_entry_or_null_acquire() function that uses an acquire barrier to read the pointer to the first member in a list (or return NULL). (3) Use list_add_tail_release() when adding a subreq to ->subrequests. (4) Use list_first_entry_or_null_acquire() when initially accessing the front of the list (when an item is removed, the pointer to the new front iterm is obtained under the same lock).

References

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