CVE-2026-23098 (GCVE-0-2026-23098)

Vulnerability from cvelistv5 – Published: 2026-02-04 16:08 – Updated: 2026-02-09 08:38
VLAI?
Title
netrom: fix double-free in nr_route_frame()
Summary
In the Linux kernel, the following vulnerability has been resolved: netrom: fix double-free in nr_route_frame() In nr_route_frame(), old_skb is immediately freed without checking if nr_neigh->ax25 pointer is NULL. Therefore, if nr_neigh->ax25 is NULL, the caller function will free old_skb again, causing a double-free bug. Therefore, to prevent this, we need to modify it to check whether nr_neigh->ax25 is NULL before freeing old_skb.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 25aab6bfc31017a7e52035b99aef5c2b6bde8ffb (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6e0110ea90313b7c0558a0b77038274a6821caf8 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7c48fdf2d1349bb54815b56fb012b9d577707708 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < bd8955337e3764f912f49b360e176d8aaecf7016 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 94d1a8bd08af1f4cc345c5c29f5db1ea72b8bb8c (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9f5fa78d9980fe75a69835521627ab7943cb3d67 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ba1096c315283ee3292765f6aea4cca15816c4f7 (git)
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    Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.10.249 , ≤ 5.10.* (semver)
Unaffected: 5.15.199 , ≤ 5.15.* (semver)
Unaffected: 6.1.162 , ≤ 6.1.* (semver)
Unaffected: 6.6.122 , ≤ 6.6.* (semver)
Unaffected: 6.12.68 , ≤ 6.12.* (semver)
Unaffected: 6.18.8 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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Therefore, if nr_neigh-\u003eax25 is NULL,\\nthe caller function will free old_skb again, causing a double-free bug.\\n\\nTherefore, to prevent this, we need to modify it to check whether\\nnr_neigh-\u003eax25 is NULL before freeing old_skb.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\nnetrom: soluciona doble liberaci\u00f3n en nr_route_frame()\\n\\nEn nr_route_frame(), old_skb es liberado inmediatamente sin comprobar si el puntero nr_neigh-\u0026gt;ax25 es NULL. 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  }
}


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Sightings

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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.



Detection rules are retrieved from Rulezet.