{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-06-04T20:38:07.709","vulnerabilities":[{"cve":{"id":"CVE-2026-23134","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2026-02-14T16:15:53.377","lastModified":"2026-03-17T21:16:27.177","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nslab: fix kmalloc_nolock() context check for PREEMPT_RT\n\nOn PREEMPT_RT kernels, local_lock becomes a sleeping lock. The current\ncheck in kmalloc_nolock() only verifies we're not in NMI or hard IRQ\ncontext, but misses the case where preemption is disabled.\n\nWhen a BPF program runs from a tracepoint with preemption disabled\n(preempt_count > 0), kmalloc_nolock() proceeds to call\nlocal_lock_irqsave() which attempts to acquire a sleeping lock,\ntriggering:\n\n  BUG: sleeping function called from invalid context\n  in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 6128\n  preempt_count: 2, expected: 0\n\nFix this by checking !preemptible() on PREEMPT_RT, which directly\nexpresses the constraint that we cannot take a sleeping lock when\npreemption is disabled. This encompasses the previous checks for NMI\nand hard IRQ contexts while also catching cases where preemption is\ndisabled."},{"lang":"es","value":"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nslab: corrección de la verificación de contexto de kmalloc_nolock() para PREEMPT_RT\n\nEn kernels PREEMPT_RT, local_lock se convierte en un bloqueo de suspensión. La verificación actual en kmalloc_nolock() solo verifica que no estamos en un contexto NMI o de IRQ dura, pero omite el caso en que la preemption está deshabilitada.\n\nCuando un programa BPF se ejecuta desde un tracepoint con la preemption deshabilitada (preempt_count > 0), kmalloc_nolock() procede a llamar a local_lock_irqsave(), que intenta adquirir un bloqueo de suspensión, lo que desencadena:\n\n  BUG: función de suspensión llamada desde contexto inválido\n  in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 6128\n  preempt_count: 2, esperado: 0\n\nSolucione esto verificando !preemptible() en PREEMPT_RT, lo que expresa directamente la restricción de que no podemos tomar un bloqueo de suspensión cuando la preemption está deshabilitada. Esto abarca las verificaciones anteriores para contextos NMI e IRQ dura, al mismo tiempo que detecta casos en los que la preemption está deshabilitada."}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"NVD-CWE-noinfo"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"6.18.8","matchCriteriaId":"7B26C1E1-97A9-48B8-81C6-B6A3A0FC6C7E"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*","matchCriteriaId":"17B67AA7-40D6-4AFA-8459-F200F3D7CFD1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*","matchCriteriaId":"C47E4CC9-C826-4FA9-B014-7FE3D9B318B2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*","matchCriteriaId":"F71D92C0-C023-48BD-B3B6-70B638EEE298"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*","matchCriteriaId":"13580667-0A98-40CC-B29F-D12790B91BDB"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*","matchCriteriaId":"CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*","matchCriteriaId":"3EF854A1-ABB1-4E93-BE9A-44569EC76C0D"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/99a3e3a1cfc93b8fe318c0a3a5cfb01f1d4ad53c","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/f60ba4a97ae3f94e4818722ed2e4d260bbb17b44","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]}]}}]}