{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2024-26768","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-02-19T14:20:24.173Z","datePublished":"2024-04-03T17:00:50.135Z","dateUpdated":"2025-05-04T08:56:04.330Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T08:56:04.330Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nLoongArch: Change acpi_core_pic[NR_CPUS] to acpi_core_pic[MAX_CORE_PIC]\n\nWith default config, the value of NR_CPUS is 64. When HW platform has\nmore then 64 cpus, system will crash on these platforms. MAX_CORE_PIC\nis the maximum cpu number in MADT table (max physical number) which can\nexceed the supported maximum cpu number (NR_CPUS, max logical number),\nbut kernel should not crash. Kernel should boot cpus with NR_CPUS, let\nthe remainder cpus stay in BIOS.\n\nThe potential crash reason is that the array acpi_core_pic[NR_CPUS] can\nbe overflowed when parsing MADT table, and it is obvious that CORE_PIC\nshould be corresponding to physical core rather than logical core, so it\nis better to define the array as acpi_core_pic[MAX_CORE_PIC].\n\nWith the patch, system can boot up 64 vcpus with qemu parameter -smp 128,\notherwise system will crash with the following message.\n\n[    0.000000] CPU 0 Unable to handle kernel paging request at virtual address 0000420000004259, era == 90000000037a5f0c, ra == 90000000037a46ec\n[    0.000000] Oops[#1]:\n[    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 6.8.0-rc2+ #192\n[    0.000000] Hardware name: QEMU QEMU Virtual Machine, BIOS unknown 2/2/2022\n[    0.000000] pc 90000000037a5f0c ra 90000000037a46ec tp 9000000003c90000 sp 9000000003c93d60\n[    0.000000] a0 0000000000000019 a1 9000000003d93bc0 a2 0000000000000000 a3 9000000003c93bd8\n[    0.000000] a4 9000000003c93a74 a5 9000000083c93a67 a6 9000000003c938f0 a7 0000000000000005\n[    0.000000] t0 0000420000004201 t1 0000000000000000 t2 0000000000000001 t3 0000000000000001\n[    0.000000] t4 0000000000000003 t5 0000000000000000 t6 0000000000000030 t7 0000000000000063\n[    0.000000] t8 0000000000000014 u0 ffffffffffffffff s9 0000000000000000 s0 9000000003caee98\n[    0.000000] s1 90000000041b0480 s2 9000000003c93da0 s3 9000000003c93d98 s4 9000000003c93d90\n[    0.000000] s5 9000000003caa000 s6 000000000a7fd000 s7 000000000f556b60 s8 000000000e0a4330\n[    0.000000]    ra: 90000000037a46ec platform_init+0x214/0x250\n[    0.000000]   ERA: 90000000037a5f0c efi_runtime_init+0x30/0x94\n[    0.000000]  CRMD: 000000b0 (PLV0 -IE -DA +PG DACF=CC DACM=CC -WE)\n[    0.000000]  PRMD: 00000000 (PPLV0 -PIE -PWE)\n[    0.000000]  EUEN: 00000000 (-FPE -SXE -ASXE -BTE)\n[    0.000000]  ECFG: 00070800 (LIE=11 VS=7)\n[    0.000000] ESTAT: 00010000 [PIL] (IS= ECode=1 EsubCode=0)\n[    0.000000]  BADV: 0000420000004259\n[    0.000000]  PRID: 0014c010 (Loongson-64bit, Loongson-3A5000)\n[    0.000000] Modules linked in:\n[    0.000000] Process swapper (pid: 0, threadinfo=(____ptrval____), task=(____ptrval____))\n[    0.000000] Stack : 9000000003c93a14 9000000003800898 90000000041844f8 90000000037a46ec\n[    0.000000]         000000000a7fd000 0000000008290000 0000000000000000 0000000000000000\n[    0.000000]         0000000000000000 0000000000000000 00000000019d8000 000000000f556b60\n[    0.000000]         000000000a7fd000 000000000f556b08 9000000003ca7700 9000000003800000\n[    0.000000]         9000000003c93e50 9000000003800898 9000000003800108 90000000037a484c\n[    0.000000]         000000000e0a4330 000000000f556b60 000000000a7fd000 000000000f556b08\n[    0.000000]         9000000003ca7700 9000000004184000 0000000000200000 000000000e02b018\n[    0.000000]         000000000a7fd000 90000000037a0790 9000000003800108 0000000000000000\n[    0.000000]         0000000000000000 000000000e0a4330 000000000f556b60 000000000a7fd000\n[    0.000000]         000000000f556b08 000000000eaae298 000000000eaa5040 0000000000200000\n[    0.000000]         ...\n[    0.000000] Call Trace:\n[    0.000000] [<90000000037a5f0c>] efi_runtime_init+0x30/0x94\n[    0.000000] [<90000000037a46ec>] platform_init+0x214/0x250\n[    0.000000] [<90000000037a484c>] setup_arch+0x124/0x45c\n[    0.000000] [<90000000037a0790>] start_kernel+0x90/0x670\n[    0.000000] [<900000000378b0d8>] kernel_entry+0xd8/0xdc"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/loongarch/include/asm/acpi.h","arch/loongarch/kernel/acpi.c"],"versions":[{"version":"fa96b57c149061f71a70bd6582d995f6424fbbf4","lessThan":"88e189bd16e5889e44a41b3309558ebab78b9280","status":"affected","versionType":"git"},{"version":"fa96b57c149061f71a70bd6582d995f6424fbbf4","lessThan":"0f6810e39898af2d2cabd9313e4dbc945fb5dfdd","status":"affected","versionType":"git"},{"version":"fa96b57c149061f71a70bd6582d995f6424fbbf4","lessThan":"4551b30525cf3d2f026b92401ffe241eb04dfebe","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/loongarch/include/asm/acpi.h","arch/loongarch/kernel/acpi.c"],"versions":[{"version":"5.19","status":"affected"},{"version":"0","lessThan":"5.19","status":"unaffected","versionType":"semver"},{"version":"6.6.19","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.7.7","lessThanOrEqual":"6.7.*","status":"unaffected","versionType":"semver"},{"version":"6.8","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.6.19"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.7.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.8"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/88e189bd16e5889e44a41b3309558ebab78b9280"},{"url":"https://git.kernel.org/stable/c/0f6810e39898af2d2cabd9313e4dbc945fb5dfdd"},{"url":"https://git.kernel.org/stable/c/4551b30525cf3d2f026b92401ffe241eb04dfebe"}],"title":"LoongArch: Change acpi_core_pic[NR_CPUS] to acpi_core_pic[MAX_CORE_PIC]","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-120","lang":"en","description":"CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')"}]}],"metrics":[{"cvssV3_1":{"scope":"CHANGED","version":"3.1","baseScore":6.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2024-04-03T19:30:26.181836Z","id":"CVE-2024-26768","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-11-07T19:36:27.034Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-02T00:14:13.501Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/88e189bd16e5889e44a41b3309558ebab78b9280","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/0f6810e39898af2d2cabd9313e4dbc945fb5dfdd","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/4551b30525cf3d2f026b92401ffe241eb04dfebe","tags":["x_transferred"]}]}]}}