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CVE-2022-50502: mm: /proc/pid/smaps_rollup: fix no vma's null-deref

mediumCVSS 5.5CVE-2022-50502

CSIRTS triage

vendor: Linuxproduct: Linux kernelOther
What
Null pointer dereference in /proc/pid/smaps_rollup when no VMAs are present.
Who is affected
Systems running affected Linux kernel versions where userspace reads smaps_rollup procfs files.
Urgency
Medium severity; not exploited but null dereference causes kernel crash.
Action
Apply kernel security patch to add null pointer checks in smaps_rollup handling.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
medium — CVSS 5.5
Published
2026-08-06
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-50502

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2022-50502coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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