4.7

CVE-2022-49733

ALSA: pcm: oss: Fix race at SNDCTL_DSP_SYNC

In the Linux kernel, the following vulnerability has been resolved:

ALSA: pcm: oss: Fix race at SNDCTL_DSP_SYNC

There is a small race window at snd_pcm_oss_sync() that is called from
OSS PCM SNDCTL_DSP_SYNC ioctl; namely the function calls
snd_pcm_oss_make_ready() at first, then takes the params_lock mutex
for the rest.  When the stream is set up again by another thread
between them, it leads to inconsistency, and may result in unexpected
results such as NULL dereference of OSS buffer as a fuzzer spotted
recently.

The fix is simply to cover snd_pcm_oss_make_ready() call into the same
params_lock mutex with snd_pcm_oss_make_ready_locked() variant.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version < 5.4.215
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.148
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.68
Linux ≫ Linux Kernel Version >= 5.16 < 5.19.9
Linux ≫ Linux Kernel Version6.0 Updaterc1
Linux ≫ Linux Kernel Version6.0 Updaterc2
Linux ≫ Linux Kernel Version6.0 Updaterc3
Linux ≫ Linux Kernel Version6.0 Updaterc4
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.14% 0.033
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 4.7 1 3.6
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
134c704f-9b21-4f2e-91b3-4a467353bcc0 4.7 1 3.6
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

https://git.kernel.org/stable/c/4051324a6dafd7053c74c475e80b3ba10ae672b0
Patch
https://git.kernel.org/stable/c/723ac5ab2891b6c10dd6cc78ef5456af593490eb
Patch
https://git.kernel.org/stable/c/8015ef9e8a0ee5cecfd0cb6805834d007ab26f86
Patch
https://git.kernel.org/stable/c/8423f0b6d513b259fdab9c9bf4aaa6188d054c2d
Patch
https://git.kernel.org/stable/c/fce793a056c604b41a298317cf704dae255f1b36
Patch