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CVE-2026-97980s390/debug: Fix NULL pointer dereference in debug_set_level()

Description

In the Linux kernel, the following vulnerability has been resolved: s390/debug: Fix NULL pointer dereference in debug_set_level() Commit a2cec6863709 ("s390/debug: Add s390dbf kernel parameter") incorrectly removed a null-id check from debug_set_level(), introducing a possible NULL pointer dereference for debug-API users that put debug_register() results unchecked into debug_set_level(). Fix this by moving the check from the internal _debug_set_level() variant back to the external debug_set_level() wrapper.

Timeline

  1. ID reserved

    By Linux

  2. Published

  3. · 24 days later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.

EPSS (exploitation in 30 days)
0.15% · top 95% of all CVEs (15 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.

Affected products

  • Linux · Linux

    • affected a2cec6863709d6673a025acc066c962b85a75842 – < 716e1cd3783806929407dbd596e6b1118971eb9e
    • affected a2cec6863709d6673a025acc066c962b85a75842 – < b1eb31d533cdfcae1011ed53850d52f36afe5774

  • Linux · Linux

    • affected 7.2
    • unaffected < 7.2
    • unaffected 7.2.7 – ≤ 7.2.*
    • unaffected 7.3 – ≤ *

References

References2

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .