CVE-2025-39978
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: octeontx2-pf: Fix potential use after free in otx2_tc_add_flow() This code calls kfree_rcu(new_node, rcu) and then dereferences "new_node" and then dereferences it on the next line. Two lines later, we take a mutex so I don't think this is an RCU safe region. Re-order it to do the dereferences before queuing up the free.
Severity
HIGH
CVSS score
7.8
(v3.1)
Vulnerability status
Deferred
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-10-15 08:15:35.640000
Last modified
2026-10-19 21:10:00.160000
View original CVE JSON
{
"id": "CVE-2025-39978",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-10-15T08:15:35.640",
"lastModified": "2026-10-19T21:10:00.160",
"vulnStatus": "Deferred",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocteontx2-pf: Fix potential use after free in otx2_tc_add_flow()\n\nThis code calls kfree_rcu(new_node, rcu) and then dereferences \"new_node\"\nand then dereferences it on the next line. Two lines later, we take\na mutex so I don't think this is an RCU safe region. Re-order it to do\nthe dereferences before queuing up the free."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nocteontx2-pf: Corrección de un uso potencial después de liberar en otx2_tc_add_flow()\n\nEste código llama a kfree_rcu(new_node, rcu) y luego desreferencia 'new_node' y luego lo desreferencia en la siguiente línea. Dos líneas más tarde, tomamos un mutex, así que no creo que esta sea una región segura para RCU. Reordénelo para hacer las desreferencias antes de poner en cola la liberación."
}
],
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"programFiles": [
"drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c"
],
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"baseScore": 7.8,
"baseSeverity": "HIGH",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
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"id": "CVE-2025-39978",
"options": [
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{
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