{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-10T11:42:01.864","vulnerabilities":[{"cve":{"id":"CVE-2025-38023","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2025-06-18T10:15:34.100","lastModified":"2025-12-17T19:48:11.300","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfs: handle failure of nfs_get_lock_context in unlock path\n\nWhen memory is insufficient, the allocation of nfs_lock_context in\nnfs_get_lock_context() fails and returns -ENOMEM. If we mistakenly treat\nan nfs4_unlockdata structure (whose l_ctx member has been set to -ENOMEM)\nas valid and proceed to execute rpc_run_task(), this will trigger a NULL\npointer dereference in nfs4_locku_prepare. For example:\n\nBUG: kernel NULL pointer dereference, address: 000000000000000c\nPGD 0 P4D 0\nOops: Oops: 0000 [#1] SMP PTI\nCPU: 15 UID: 0 PID: 12 Comm: kworker/u64:0 Not tainted 6.15.0-rc2-dirty #60\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-2.fc40\nWorkqueue: rpciod rpc_async_schedule\nRIP: 0010:nfs4_locku_prepare+0x35/0xc2\nCode: 89 f2 48 89 fd 48 c7 c7 68 69 ef b5 53 48 8b 8e 90 00 00 00 48 89 f3\nRSP: 0018:ffffbbafc006bdb8 EFLAGS: 00010246\nRAX: 000000000000004b RBX: ffff9b964fc1fa00 RCX: 0000000000000000\nRDX: 0000000000000000 RSI: fffffffffffffff4 RDI: ffff9ba53fddbf40\nRBP: ffff9ba539934000 R08: 0000000000000000 R09: ffffbbafc006bc38\nR10: ffffffffb6b689c8 R11: 0000000000000003 R12: ffff9ba539934030\nR13: 0000000000000001 R14: 0000000004248060 R15: ffffffffb56d1c30\nFS: 0000000000000000(0000) GS:ffff9ba5881f0000(0000) knlGS:00000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 000000000000000c CR3: 000000093f244000 CR4: 00000000000006f0\nCall Trace:\n <TASK>\n __rpc_execute+0xbc/0x480\n rpc_async_schedule+0x2f/0x40\n process_one_work+0x232/0x5d0\n worker_thread+0x1da/0x3d0\n ? __pfx_worker_thread+0x10/0x10\n kthread+0x10d/0x240\n ? __pfx_kthread+0x10/0x10\n ret_from_fork+0x34/0x50\n ? __pfx_kthread+0x10/0x10\n ret_from_fork_asm+0x1a/0x30\n </TASK>\nModules linked in:\nCR2: 000000000000000c\n---[ end trace 0000000000000000 ]---\n\nFree the allocated nfs4_unlockdata when nfs_get_lock_context() fails and\nreturn NULL to terminate subsequent rpc_run_task, preventing NULL pointer\ndereference."},{"lang":"es","value":"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nfs: fallo en el manejo de nfs_get_lock_context en la ruta de desbloqueo. Cuando la memoria es insuficiente, la asignación de nfs_lock_context en nfs_get_lock_context() falla y devuelve -ENOMEM. Si por error tratamos una estructura nfs4_unlockdata (cuyo miembro l_ctx se ha establecido en -ENOMEM) como válida y procedemos a ejecutar rpc_run_task(), se activará una desreferencia de puntero NULL en nfs4_locku_prepare. Por ejemplo: ERROR: desreferencia de puntero NULL del núcleo, dirección: 000000000000000c PGD 0 P4D 0 Oops: Oops: 0000 [#1] SMP PTI CPU: 15 UID: 0 PID: 12 Comm: kworker/u64:0 Not tainted 6.15.0-rc2-dirty #60 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-2.fc40 Workqueue: rpciod rpc_async_schedule RIP: 0010:nfs4_locku_prepare+0x35/0xc2 Code: 89 f2 48 89 fd 48 c7 c7 68 69 ef b5 53 48 8b 8e 90 00 00 00 48 89 f3 RSP: 0018:ffffbbafc006bdb8 EFLAGS: 00010246 RAX: 000000000000004b RBX: ffff9b964fc1fa00 RCX: 0000000000000000 RDX: 0000000000000000 RSI: fffffffffffffff4 RDI: ffff9ba53fddbf40 RBP: ffff9ba539934000 R08: 0000000000000000 R09: ffffbbafc006bc38 R10: ffffffffb6b689c8 R11: 0000000000000003 R12: ffff9ba539934030 R13: 0000000000000001 R14: 0000000004248060 R15: ffffffffb56d1c30 FS: 0000000000000000(0000) GS:ffff9ba5881f0000(0000) knlGS:00000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000000000c CR3: 000000093f244000 CR4: 00000000000006f0 Call Trace:  __rpc_execute+0xbc/0x480 rpc_async_schedule+0x2f/0x40 process_one_work+0x232/0x5d0 worker_thread+0x1da/0x3d0 ? __pfx_worker_thread+0x10/0x10 kthread+0x10d/0x240 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x34/0x50 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30  Modules linked in: CR2: 000000000000000c [ fin de seguimiento 0000000000000000 ]--- Libera el nfs4_unlockdata asignado cuando nfs_get_lock_context() falla y devuelve NULL para finalizar la rpc_run_task posterior, lo que evita la desreferencia del puntero NULL."}],"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":"CWE-476"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.4.294","matchCriteriaId":"A8373139-3096-449F-9CD5-B392BF92826E"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.10.238","matchCriteriaId":"0DAAEF7F-D560-47FC-8B65-20404DB82432"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15.184","matchCriteriaId":"8E22C14E-E3DF-4919-9ECC-78C6CBCA9D70"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.1.140","matchCriteriaId":"EEA541CD-1863-4E7F-85F5-EAC305910323"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.92","matchCriteriaId":"7787FD66-D748-44AF-A052-DE495E1E23AE"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.12.30","matchCriteriaId":"8F43EF2E-9448-4BCA-99D9-DAEAEB7523C5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.14.8","matchCriteriaId":"D4458049-AD51-4F1B-BAB9-C32B53A54DE1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*","matchCriteriaId":"8D465631-2980-487A-8E65-40AE2B9F8ED1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:*","matchCriteriaId":"4C9D071F-B28E-46EC-AC61-22B913390211"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:*","matchCriteriaId":"13FC0DDE-E513-465E-9E81-515702D49B74"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.15:rc4:*:*:*:*:*:*","matchCriteriaId":"8C7B5B0E-4EEB-48F5-B4CF-0935A7633845"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.15:rc5:*:*:*:*:*:*","matchCriteriaId":"2D240580-3048-49B2-9E27-F115A9DF8224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.15:rc6:*:*:*:*:*:*","matchCriteriaId":"90320558-E553-4EF5-8A0B-0F5D20113BD2"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*","matchCriteriaId":"FA6FEEC2-9F11-4643-8827-749718254FED"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/4c189fd40a09a03f9a900bedb2d9064f1734d72a","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/72f552e00c50f265896d3c19edc6696aa2910081","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/85fb7f8ca5f8c138579fdfc9b97b3083e6077d40","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/a6879a076b98c99c9fe747816fe1c29543442441","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/c457dc1ec770a22636b473ce5d35614adfe97636","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/da824f1271633bcb515ca8084cda3eda4b3ace51","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/db6f5ee1fc8f54d079d0751292c2fc2d78e3aad1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/f601960af04d2ecb007c928ba153d34051acd9c1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]}]}}]}