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Vulnerabilities

Vulnerability · CVE-2022-50819

In the Linux kernel, the following vulnerability has been resolved: udmabuf: Set ubuf->sg = NULL if the creation of sg table fails When userspace tries to map the dmabuf and if for

Published Dec 30, 2025 · catalog updated May 11, 2026 · Linux Linux

Last checked Oct 29, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2022-50819. EPSS is 0.24%. Act only if a listed version of Linux Linux is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
None0.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.24%
Remediation
Version ranges on file
Affected products
vendor Linux Linux 284562e1f34874e267d4f499362c3816f8f6bc3f <dfbed8c92eb853929f4fa676ba493391dab47be4

In the Linux kernel, the following vulnerability has been resolved: udmabuf: Set ubuf->sg = NULL if the creation of sg table fails When userspace tries to map the dmabuf and if for some reason (e.g. OOM) the creation of the sg table fails, ubuf->sg needs to be set to NULL. Otherwise, when the userspace subsequently closes the dmabuf fd, we'd try to erroneously free the invalid sg table from release_udmabuf resulting in the following crash reported by syzbot: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in ran

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Linux Linux 284562e1f34874e267d4f499362c3816f8f6bc3f <dfbed8c92eb853929f4fa676ba493391dab47be4284562e1f34874e267d4f499362c3816f8f6bc3f <dfbed8c92eb853929f4fa676ba493391dab47be4

How to fix CVE-2022-50819

  • Upgrade

    CVE-2022-50819 lists a fix boundary at dfbed8c92eb853929f4fa676ba493391dab47be4. Compare the installed build with that boundary before you change production.

  • Version check

    Seen in 284562e1f34874e267d4f499362c3816f8f6bc3f <dfbed8c92eb853929f4fa676ba493391dab47be4

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2022-50819. EPSS is 0.24%. Act only if a listed version of Linux Linux is installed.

Which versions are affected?

Compare what you have installed with Linux Linux 284562e1f34874e267d4f499362c3816f8f6bc3f <dfbed8c92eb853929f4fa676ba493391dab47be4 284562e1f34874e267d4f499362c3816f8f6bc3f <dfbed8c92eb853929f4fa676ba493391dab47be4. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.24%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 30, 2025 · EUVD

    Detected

    In the Linux kernel, the following vulnerability has been resolved: udmabuf: Set ubuf->sg = NULL if the creation of sg table fails When userspace tries to map the dmabuf and if for some reason (e.g. OOM) the creation of the sg table fails, ubuf->sg needs to be set to NULL. Otherwise, when the userspace subsequently closes the dmabuf fd, we'd try to erroneously free the invalid sg table from releas

  2. May 11, 2026 · EUVD

    Updated

    In the Linux kernel, the following vulnerability has been resolved: udmabuf: Set ubuf->sg = NULL if the creation of sg table fails When userspace tries to map the dmabuf and if for some reason (e.g. OOM) the creation of the sg table fails, ubuf->sg needs to be set to NULL. Otherwise, when the userspace subsequently closes the dmabuf fd, we'd try to erroneously free the invalid sg table from releas

Sources

  • CVE.orgVulnerability recordCVE-2022-50819

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2022-50819

    30-day exploitation probability 0.24%

    first.org
  • EUVDVulnerability recordEUVD-2022-55879

    In the Linux kernel, the following vulnerability has been resolved: udmabuf: Set ubuf->sg = NULL if the creation of sg table fails When userspace tries to map the dmabuf and if for some reason (e.g. OOM) the creation of the sg table fails, ubuf->sg needs to be set to NULL. Otherw

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 29, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgOct 29, 2026
  • FIRST EPSSOct 29, 2026
  • EUVDOct 29, 2026