NVD / CVE Program· CNA Linux

CVE-2022-49288: ALSA: pcm: Fix races among concurrent prealloc proc writes

Noroxi assessment

Priority: Monitor (action score 31/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.28% (FIRST EPSS).
Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: Linux Linux 37b12c16beb6f6c1c3c678c1aacbc46525c250f7, 51fce708ab8986a9879ee5da946a2cc120f1036d, 5ed8f8e3c4e59d0396b9ccf2e639711e24295bb6.

Low priority for now. Upgrade to Linux Linux 37b12c16beb6f6c1c3c678c1aacbc46525c250f7, 51fce708ab8986a9879ee5da946a2cc120f1036d, 5ed8f8e3c4e59d0396b9ccf2e639711e24295bb6 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: Fix races among concurrent prealloc proc writes We have no protection against concurrent PCM buffer preallocation changes via proc files, and it may potentially lead to UAF or some weird problem. This patch applies the PCM open_mutex to the proc write operation for avoiding the racy proc writes and the PCM stream open (and further operations).

HighCVSS 7.8 · v3.1—No exploit Fix available

Memory safety

Published: Feb 26, 2025
Updated: Jun 17, 2026
EPSS: 0.2% · 20th percentile
CWE: CWE-416

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 31 / 40 · 7.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.2%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

linux linux kernelbefore 4.14.279
linux linux kernel4.15 and later · before 4.19.243
linux linux kernel4.20 and later · before 5.4.193
linux linux kernel5.5 and later · before 5.10.109
linux linux kernel5.11 and later · before 5.15.32
linux linux kernel5.16 and later · before 5.16.18
linux linux kernel5.17 and later · before 5.17.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

Linux Linux
- 2.6.12affected
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before e7786c445bb67a9a6e64f66ebd6b7215b153ff7daffected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before e14dca613e0a6ddc2bf6e360f16936a9f865205baffected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 37b12c16beb6f6c1c3c678c1aacbc46525c250f7affected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before b560d670c87d7d40b3cf6949246fa4c7aa65a00aaffected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 51fce708ab8986a9879ee5da946a2cc120f1036daffected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before a21d2f323b5a978dedf9ff1d50f101f85e39b3f2affected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 5ed8f8e3c4e59d0396b9ccf2e639711e24295bb6affected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 69534c48ba8ce552ce383b3dfdb271ffe51820c3affected · git
- before 2.6.12not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:12	linux	before 5.17.3-1	5.17.3-1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME CORE	kernel-default	before 3.0.101-108.180.1	3.0.101-108.180.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME CORE	kernel-docs	before 3.0.101-108.180.1	3.0.101-108.180.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME CORE	kernel-ec2	before 3.0.101-108.180.1	3.0.101-108.180.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME CORE	kernel-source	before 3.0.101-108.180.1	3.0.101-108.180.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME CORE	kernel-syms	before 3.0.101-108.180.1	3.0.101-108.180.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME CORE	kernel-trace	before 3.0.101-108.180.1	3.0.101-108.180.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME CORE	kernel-xen	before 3.0.101-108.180.1	3.0.101-108.180.1

Same product

linux: all records

Other highest-scoring records for the same primary product.

CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
90Now
CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
89Now
CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
85Now

Published before and after this one in the same product

← EarlierCVE-2022-49286Feb 26, 2025 · tpm: use try_get_ops() in tpm-space.c
18Monitor
← EarlierCVE-2022-49287Feb 26, 2025 · tpm: fix reference counting for struct tpm_chip
28Monitor
Later →CVE-2022-49289Feb 26, 2025 · uaccess: fix integer overflow on access_ok()
28Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Linux Linux	37b12c16beb6f6c1c3c678c1aacbc46525c250f7	Vendor (CNA)
Linux Linux	51fce708ab8986a9879ee5da946a2cc120f1036d	Vendor (CNA)
Linux Linux	5ed8f8e3c4e59d0396b9ccf2e639711e24295bb6	Vendor (CNA)
Linux Linux	69534c48ba8ce552ce383b3dfdb271ffe51820c3	Vendor (CNA)
Linux Linux	a21d2f323b5a978dedf9ff1d50f101f85e39b3f2	Vendor (CNA)
Linux Linux	b560d670c87d7d40b3cf6949246fa4c7aa65a00a	Vendor (CNA)
Linux Linux	e14dca613e0a6ddc2bf6e360f16936a9f865205b	Vendor (CNA)
Linux Linux	e7786c445bb67a9a6e64f66ebd6b7215b153ff7d	Vendor (CNA)
debian:linux	5.17.3-1 · Debian:12	Package registry (OSV)
suse:kernel-default	3.0.101-108.180.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME CORE	Package registry (OSV)
suse:kernel-docs	3.0.101-108.180.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME CORE	Package registry (OSV)
suse:kernel-ec2	3.0.101-108.180.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME CORE	Package registry (OSV)
suse:kernel-source	3.0.101-108.180.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME CORE	Package registry (OSV)
suse:kernel-syms	3.0.101-108.180.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME CORE	Package registry (OSV)
suse:kernel-trace	3.0.101-108.180.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME CORE	Package registry (OSV)
suse:kernel-xen	3.0.101-108.180.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME CORE	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Someone with local access to the system can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Local
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1free(dev->buf);
2/* ... another thread is still running ... */
3process(dev->buf);

Fixed

1lock(&dev->lock);
2free(dev->buf);
3dev->buf = NULL;
4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

Fix✗ → ✓Sep 28, 2026, 10:11 PM UTC

For records you follow, these changes also arrive as notifications. →

References

git.kernel.org/stable/c/37b12c16beb6f6c1c3c678c1aacbc46525c250f7

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records