CVE-2025-39764
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
netfilter: ctnetlink: remove refcounting in expectation dumpers
Same pattern as previous patch: do not keep the expectation object alive via refcount, only store a cookie value and then use that as the skip hint for dump resumption.
AFAICS this has the same issue as the one resolved in the conntrack dumper, when we do if (!refcount_inc_not_zero(&exp->use))
to increment the refcount, there is a chance that exp == last, which causes a double-increment of the refcount and subsequent memory leak.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.17%
- Percentil entre todas las CVEs puntuadas: 6
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- NVD-CWE-Other
Referencias
- https://git.kernel.org/stable/c/078d33c95bf534d37aa04269d1ae6158e20082d5
- https://git.kernel.org/stable/c/1492e3dcb2be3aa46d1963da96aa9593e4e4db5a
- https://git.kernel.org/stable/c/64b7684042246e3238464c66894e30ba30c7e851
- https://git.kernel.org/stable/c/9e5021a906532ca16e2aac69c0607711e1c70b1f
- https://git.kernel.org/stable/c/a4d634ded4d3d400f115d84f654f316f249531c9
- https://git.kernel.org/stable/c/b05500444b8eb97644efdd180839a04a706be97c
- https://git.kernel.org/stable/c/bada48ad5b0590e318d0f79636ff62a2ef9f4955
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
JSON original (NVD)
Mostrar
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}
],
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