{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-18T19:35:52.123","vulnerabilities":[{"cve":{"id":"CVE-2024-49935","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2024-10-21T18:15:15.350","lastModified":"2025-11-03T23:16:31.717","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: PAD: fix crash in exit_round_robin()\n\nThe kernel occasionally crashes in cpumask_clear_cpu(), which is called\nwithin exit_round_robin(), because when executing clear_bit(nr, addr) with\nnr set to 0xffffffff, the address calculation may cause misalignment within\nthe memory, leading to access to an invalid memory address.\n\n----------\nBUG: unable to handle kernel paging request at ffffffffe0740618\n        ...\nCPU: 3 PID: 2919323 Comm: acpi_pad/14 Kdump: loaded Tainted: G           OE  X --------- -  - 4.18.0-425.19.2.el8_7.x86_64 #1\n        ...\nRIP: 0010:power_saving_thread+0x313/0x411 [acpi_pad]\nCode: 89 cd 48 89 d3 eb d1 48 c7 c7 55 70 72 c0 e8 64 86 b0 e4 c6 05 0d a1 02 00 01 e9 bc fd ff ff 45 89 e4 42 8b 04 a5 20 82 72 c0 <f0> 48 0f b3 05 f4 9c 01 00 42 c7 04 a5 20 82 72 c0 ff ff ff ff 31\nRSP: 0018:ff72a5d51fa77ec8 EFLAGS: 00010202\nRAX: 00000000ffffffff RBX: ff462981e5d8cb80 RCX: 0000000000000000\nRDX: 0000000000000000 RSI: 0000000000000246 RDI: 0000000000000246\nRBP: ff46297556959d80 R08: 0000000000000382 R09: ff46297c8d0f38d8\nR10: 0000000000000000 R11: 0000000000000001 R12: 000000000000000e\nR13: 0000000000000000 R14: ffffffffffffffff R15: 000000000000000e\nFS:  0000000000000000(0000) GS:ff46297a800c0000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: ffffffffe0740618 CR3: 0000007e20410004 CR4: 0000000000771ee0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nPKRU: 55555554\nCall Trace:\n ? acpi_pad_add+0x120/0x120 [acpi_pad]\n kthread+0x10b/0x130\n ? set_kthread_struct+0x50/0x50\n ret_from_fork+0x1f/0x40\n        ...\nCR2: ffffffffe0740618\n\ncrash> dis -lr ffffffffc0726923\n        ...\n/usr/src/debug/kernel-4.18.0-425.19.2.el8_7/linux-4.18.0-425.19.2.el8_7.x86_64/./include/linux/cpumask.h: 114\n0xffffffffc0726918 <power_saving_thread+776>:\tmov    %r12d,%r12d\n/usr/src/debug/kernel-4.18.0-425.19.2.el8_7/linux-4.18.0-425.19.2.el8_7.x86_64/./include/linux/cpumask.h: 325\n0xffffffffc072691b <power_saving_thread+779>:\tmov    -0x3f8d7de0(,%r12,4),%eax\n/usr/src/debug/kernel-4.18.0-425.19.2.el8_7/linux-4.18.0-425.19.2.el8_7.x86_64/./arch/x86/include/asm/bitops.h: 80\n0xffffffffc0726923 <power_saving_thread+787>:\tlock btr %rax,0x19cf4(%rip)        # 0xffffffffc0740620 <pad_busy_cpus_bits>\n\ncrash> px tsk_in_cpu[14]\n$66 = 0xffffffff\n\ncrash> px 0xffffffffc072692c+0x19cf4\n$99 = 0xffffffffc0740620\n\ncrash> sym 0xffffffffc0740620\nffffffffc0740620 (b) pad_busy_cpus_bits [acpi_pad]\n\ncrash> px pad_busy_cpus_bits[0]\n$42 = 0xfffc0\n----------\n\nTo fix this, ensure that tsk_in_cpu[tsk_index] != -1 before calling\ncpumask_clear_cpu() in exit_round_robin(), just as it is done in\nround_robin_cpu().\n\n[ rjw: Subject edit, avoid updates to the same value ]"},{"lang":"es","value":"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ACPI: PAD: corrige fallo en exit_round_robin() El kernel ocasionalmente fallo en cpumask_clear_cpu(), que se llama dentro de exit_round_robin(), porque al ejecutar clear_bit(nr, addr) con nr establecido en 0xffffffff, el cálculo de la dirección puede causar una desalineación dentro de la memoria, lo que lleva al acceso a una dirección de memoria no válida. ---------- ERROR: no se puede manejar la solicitud de paginación del núcleo en ffffffffe0740618 ... CPU: 3 PID: 2919323 Comm: acpi_pad/14 Kdump: cargado Tainted: G OE X --------- - - 4.18.0-425.19.2.el8_7.x86_64 #1 ... RIP: 0010:power_saving_thread+0x313/0x411 [acpi_pad] Código: 89 cd 48 89 d3 eb d1 48 c7 c7 55 70 72 c0 e8 64 86 b0 e4 c6 05 0d a1 02 00 01 e9 bc fd ff ff 45 89 e4 42 8b 04 a5 20 82 72 c0  48 0f b3 05 f4 9c 01 00 42 c7 04 a5 20 82 72 c0 ff ff ff ff 31 RSP: 0018:ff72a5d51fa77ec8 EFLAGS: 00010202 RAX: 00000000ffffffff RBX: ff462981e5d8cb80 RCX: 000000000000000 RDX: 000000000000000 RSI: 0000000000000246 RDI: 0000000000000246 RBP: ff46297556959d80 R08: 0000000000000382 R09: ff46297c8d0f38d8 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000e R13: 0000000000000000 R1 4: ffffffffffffffff R15: 000000000000000e FS: 0000000000000000(0000) GS:ff46297a800c0000(0000) knlGS:00000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffe0740618 CR3: 0000007e20410004 CR4: 0000000000771ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Rastreo de llamadas: ? acpi_pad_add+0x120/0x120 [acpi_pad] kthread+0x10b/0x130 ? set_kthread_struct+0x50/0x50 ret_from_fork+0x1f/0x40 ... CR2: ffffffffe0740618 crash&gt; dis -lr ffffffffc0726923 ... /usr/src/debug/kernel-4.18.0-425.19.2.el8_7/linux-4.18.0-425.19.2.el8_7.x86_64/./include/linux/cpumask.h: 114 0xffffffffc0726918 : mov %r12d,%r12d /usr/src/debug/kernel-4.18.0-425.19.2.el8_7/linux-4.18.0-425.19.2.el8_7.x86_64/./include/linux/cpumask.h: 325 0xffffffffc072691b : mov -0x3f8d7de0(,%r12,4),%eax /usr/src/debug/kernel-4.18.0-425.19.2.el8_7/linux-4.18.0-425.19.2.el8_7.x86_64/./arch/x86/include/asm/bitops.h: 80 0xffffffffc0726923 : crash btr %rax,0x19cf4(%rip) # 0xffffffffc0740620  crash&gt; px tsk_in_cpu[14] $66 = 0xffffffff crash&gt; px 0xffffffffc072692c+0x19cf4 $99 = 0xffffffffc0740620 crash&gt; sym 0xffffffffc0740620 ffffffffc0740620 (b) pad_busy_cpus_bits [acpi_pad] crash&gt; px pad_busy_cpus_bits[0] $42 = 0xfffc0 ---------- Para solucionar esto, asegúrese de que tsk_in_cpu[tsk_index] != -1 antes de llamar cpumask_clear_cpu() en exit_round_robin(), tal como se hace en round_robin_cpu(). [ rjw: Edición del tema, evitar actualizaciones al mismo valor ]"}],"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:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.168","matchCriteriaId":"F032D82B-5582-4DF5-B921-BFE0BD301364"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.1.113","matchCriteriaId":"D01BD22E-ACD1-4618-9D01-6116570BE1EE"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.55","matchCriteriaId":"E90B9576-56C4-47BC-AAB0-C5B2D438F5D0"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.10.14","matchCriteriaId":"4C16BCE0-FFA0-4599-BE0A-1FD65101C021"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"6.11.3","matchCriteriaId":"54D9C704-D679-41A7-9C40-10A6B1E7FFE9"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/03593dbb0b272ef7b0358b099841e65735422aca","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/0a2ed70a549e61c5181bad5db418d223b68ae932","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/27c045f868f0e5052c6b532868a65e0cd250c8fc","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/68a599da16ebad442ce295d8d2d5c488e3992822","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/68a8e45743d6a120f863fb14b72dc59616597019","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/82191a21a0dedc8c64e14f07f5d568d09bc4b331","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/92e5661b7d0727ab912b76625a88b33fdb9b609a","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/d214ffa6eb39c08d18a460124dd7ba318dc56f33","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html","source":"af854a3a-2127-422b-91ae-364da2661108"}]}}]}