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NVD / CVE Program· CNA Linux

CVE-2022-48994: ALSA: seq: Fix function prototype mismatch in snd_seq_expand_var_event

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.23% (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 05530ef7cf7c7d700f6753f058999b1b5099a026, 13ee8fb5410b740c8dd2867d3557c7662f7dda2d, 15c42ab8d43acb73e2eba361ad05822c0af0ecfa.

Low priority for now. Upgrade to Linux Linux 05530ef7cf7c7d700f6753f058999b1b5099a026, 13ee8fb5410b740c8dd2867d3557c7662f7dda2d, 15c42ab8d43acb73e2eba361ad05822c0af0ecfa 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: seq: Fix function prototype mismatch in snd_seq_expand_var_event With clang's kernel control flow integrity (kCFI, CONFIG_CFI_CLANG), indirect call targets are validated against the expected function pointer prototype to make sure the call target is valid to help mitigate ROP attacks. If they are not identical, there is a failure at run time, which manifests as either a kernel panic or thread getting killed. seq_copy_in_user() and seq_copy_in_kernel() did not have prototypes matching snd_seq_dump_func_t. Adjust this and remove the casts. There are not resulting binary output differences. This was found as a result of Clang's new -Wcast-function-type-strict flag, which is more sensitive than the simpler -Wcast-function-type, which only checks for type width mismatches.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Oct 21, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 14th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

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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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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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.

VendorProduct
linuxlinux 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 4.9.336
  • linux linux kernel4.10 and later · before 4.14.302
  • linux linux kernel4.15 and later · before 4.19.269
  • linux linux kernel4.20 and later · before 5.4.227
  • linux linux kernel5.5 and later · before 5.10.159
  • linux linux kernel5.11 and later · before 5.15.83
  • linux linux kernel5.16 and later · before 6.0.13
  • linux linux kernel6.1

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 b38486e82ecb9f3046e0184205f6b61408fc40c9affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before e385360705a0b346bdb57ce938249175d0613b8aaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 2f46e95bf344abc4e74f8158901d32a869e0adb6affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 63badfed200219ca656968725f1a43df293ac936affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 15c42ab8d43acb73e2eba361ad05822c0af0ecfaaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before fccd454129f6a0739651f7f58307cdb631fd6e89affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 13ee8fb5410b740c8dd2867d3557c7662f7dda2daffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 05530ef7cf7c7d700f6753f058999b1b5099a026affected · git
    • before 2.6.12not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.4-16.1.4-1

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-2022-48991Oct 21, 2024 · mm/khugepaged: invoke MMU notifiers in shmem/file collapse paths
    31Monitor
  • ← EarlierCVE-2022-48992Oct 21, 2024 · ASoC: soc-pcm: Add NULL check in BE reparenting
    22Monitor
  • Later →CVE-2022-48995Oct 21, 2024 · Input: raydium_ts_i2c - fix memory leak in raydium_i2c_send()
    22Monitor

Remediation

Which version to upgrade to

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

Product / packageFixed versionSource
Linux Linux05530ef7cf7c7d700f6753f058999b1b5099a026Vendor (CNA)
Linux Linux13ee8fb5410b740c8dd2867d3557c7662f7dda2dVendor (CNA)
Linux Linux15c42ab8d43acb73e2eba361ad05822c0af0ecfaVendor (CNA)
Linux Linux2f46e95bf344abc4e74f8158901d32a869e0adb6Vendor (CNA)
Linux Linux63badfed200219ca656968725f1a43df293ac936Vendor (CNA)
Linux Linuxb38486e82ecb9f3046e0184205f6b61408fc40c9Vendor (CNA)
Linux Linuxe385360705a0b346bdb57ce938249175d0613b8aVendor (CNA)
Linux Linuxfccd454129f6a0739651f7f58307cdb631fd6e89Vendor (CNA)
debian:linux6.1.4-1 · Debian:12Package 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.

No history yet (it accumulates with the daily EPSS job).

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
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

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

nvd-primary

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

  1. Fix✗ → ✓

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

References

Show all references (7 more)

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

All records