CVE-2025-21980 (GCVE-0-2025-21980)

Vulnerability from cvelistv5 – Published: 2025-04-01 15:47 – Updated: 2025-11-03 19:40
VLAI?
Title
sched: address a potential NULL pointer dereference in the GRED scheduler.
Summary
In the Linux kernel, the following vulnerability has been resolved: sched: address a potential NULL pointer dereference in the GRED scheduler. If kzalloc in gred_init returns a NULL pointer, the code follows the error handling path, invoking gred_destroy. This, in turn, calls gred_offload, where memset could receive a NULL pointer as input, potentially leading to a kernel crash. When table->opt is NULL in gred_init(), gred_change_table_def() is not called yet, so it is not necessary to call ->ndo_setup_tc() in gred_offload().
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: f25c0515c521375154c62c72447869f40218c861 , < d02c9acd68950a444acda18d514e2b41f846cb7f (git)
Affected: f25c0515c521375154c62c72447869f40218c861 , < 0f0a152957d64ce45b4c27c687e7d087e8f45079 (git)
Affected: f25c0515c521375154c62c72447869f40218c861 , < 68896dd50180b38ea552e49a6a00b685321e5769 (git)
Affected: f25c0515c521375154c62c72447869f40218c861 , < 5f996b4f80c2cef1f9c77275055e7fcba44c9199 (git)
Affected: f25c0515c521375154c62c72447869f40218c861 , < 115ef44a98220fddfab37a39a19370497cd718b9 (git)
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    Linux Linux Affected: 5.16
Unaffected: 0 , < 5.16 (semver)
Unaffected: 6.1.132 , ≤ 6.1.* (semver)
Unaffected: 6.6.84 , ≤ 6.6.* (semver)
Unaffected: 6.12.20 , ≤ 6.12.* (semver)
Unaffected: 6.13.8 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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