{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2024-47716","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-09-30T16:00:12.949Z","datePublished":"2024-10-21T11:53:47.434Z","dateUpdated":"2025-05-04T09:38:10.072Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T09:38:10.072Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nARM: 9410/1: vfp: Use asm volatile in fmrx/fmxr macros\n\nFloating point instructions in userspace can crash some arm kernels\nbuilt with clang/LLD 17.0.6:\n\n    BUG: unsupported FP instruction in kernel mode\n    FPEXC == 0xc0000780\n    Internal error: Oops - undefined instruction: 0 [#1] ARM\n    CPU: 0 PID: 196 Comm: vfp-reproducer Not tainted 6.10.0 #1\n    Hardware name: BCM2835\n    PC is at vfp_support_entry+0xc8/0x2cc\n    LR is at do_undefinstr+0xa8/0x250\n    pc : [<c0101d50>]    lr : [<c010a80c>]    psr: a0000013\n    sp : dc8d1f68  ip : 60000013  fp : bedea19c\n    r10: ec532b17  r9 : 00000010  r8 : 0044766c\n    r7 : c0000780  r6 : ec532b17  r5 : c1c13800  r4 : dc8d1fb0\n    r3 : c10072c4  r2 : c0101c88  r1 : ec532b17  r0 : 0044766c\n    Flags: NzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none\n    Control: 00c5387d  Table: 0251c008  DAC: 00000051\n    Register r0 information: non-paged memory\n    Register r1 information: vmalloc memory\n    Register r2 information: non-slab/vmalloc memory\n    Register r3 information: non-slab/vmalloc memory\n    Register r4 information: 2-page vmalloc region\n    Register r5 information: slab kmalloc-cg-2k\n    Register r6 information: vmalloc memory\n    Register r7 information: non-slab/vmalloc memory\n    Register r8 information: non-paged memory\n    Register r9 information: zero-size pointer\n    Register r10 information: vmalloc memory\n    Register r11 information: non-paged memory\n    Register r12 information: non-paged memory\n    Process vfp-reproducer (pid: 196, stack limit = 0x61aaaf8b)\n    Stack: (0xdc8d1f68 to 0xdc8d2000)\n    1f60:                   0000081f b6f69300 0000000f c10073f4 c10072c4 dc8d1fb0\n    1f80: ec532b17 0c532b17 0044766c b6f9ccd8 00000000 c010a80c 00447670 60000010\n    1fa0: ffffffff c1c13800 00c5387d c0100f10 b6f68af8 00448fc0 00000000 bedea188\n    1fc0: bedea314 00000001 00448ebc b6f9d000 00447608 b6f9ccd8 00000000 bedea19c\n    1fe0: bede9198 bedea188 b6e1061c 0044766c 60000010 ffffffff 00000000 00000000\n    Call trace:\n    [<c0101d50>] (vfp_support_entry) from [<c010a80c>] (do_undefinstr+0xa8/0x250)\n    [<c010a80c>] (do_undefinstr) from [<c0100f10>] (__und_usr+0x70/0x80)\n    Exception stack(0xdc8d1fb0 to 0xdc8d1ff8)\n    1fa0:                                     b6f68af8 00448fc0 00000000 bedea188\n    1fc0: bedea314 00000001 00448ebc b6f9d000 00447608 b6f9ccd8 00000000 bedea19c\n    1fe0: bede9198 bedea188 b6e1061c 0044766c 60000010 ffffffff\n    Code: 0a000061 e3877202 e594003c e3a09010 (eef16a10)\n    ---[ end trace 0000000000000000 ]---\n    Kernel panic - not syncing: Fatal exception in interrupt\n    ---[ end Kernel panic - not syncing: Fatal exception in interrupt ]---\n\nThis is a minimal userspace reproducer on a Raspberry Pi Zero W:\n\n    #include <stdio.h>\n    #include <math.h>\n\n    int main(void)\n    {\n            double v = 1.0;\n            printf(\"%fn\", NAN + *(volatile double *)&v);\n            return 0;\n    }\n\nAnother way to consistently trigger the oops is:\n\n    calvin@raspberry-pi-zero-w ~$ python -c \"import json\"\n\nThe bug reproduces only when the kernel is built with DYNAMIC_DEBUG=n,\nbecause the pr_debug() calls act as barriers even when not activated.\n\nThis is the output from the same kernel source built with the same\ncompiler and DYNAMIC_DEBUG=y, where the userspace reproducer works as\nexpected:\n\n    VFP: bounce: trigger ec532b17 fpexc c0000780\n    VFP: emulate: INST=0xee377b06 SCR=0x00000000\n    VFP: bounce: trigger eef1fa10 fpexc c0000780\n    VFP: emulate: INST=0xeeb40b40 SCR=0x00000000\n    VFP: raising exceptions 30000000\n\n    calvin@raspberry-pi-zero-w ~$ ./vfp-reproducer\n    nan\n\nCrudely grepping for vmsr/vmrs instructions in the otherwise nearly\nidential text for vfp_support_entry() makes the problem obvious:\n\n    vmlinux.llvm.good [0xc0101cb8] <+48>:  vmrs   r7, fpexc\n    vmlinux.llvm.good [0xc0101cd8] <+80>:  vmsr   fpexc, r0\n    vmlinux.llvm.good [0xc0101d20\n---truncated---"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm/vfp/vfpinstr.h"],"versions":[{"version":"4708fb041346fa9cc6745dafb8c248a3e2f1075b","lessThan":"9fc60f2bdd43e758bdf0305c0fc83221419ddb3f","status":"affected","versionType":"git"},{"version":"4708fb041346fa9cc6745dafb8c248a3e2f1075b","lessThan":"cd595d87e5fdd2fc09ea69359aa85e7f12f4b97b","status":"affected","versionType":"git"},{"version":"4708fb041346fa9cc6745dafb8c248a3e2f1075b","lessThan":"39caf610a63786b3b0ef3348ac015edc19827d6a","status":"affected","versionType":"git"},{"version":"4708fb041346fa9cc6745dafb8c248a3e2f1075b","lessThan":"89a906dfa8c3b21b3e5360f73c49234ac1eb885b","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/arm/vfp/vfpinstr.h"],"versions":[{"version":"6.6","status":"affected"},{"version":"0","lessThan":"6.6","status":"unaffected","versionType":"semver"},{"version":"6.6.54","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.10.13","lessThanOrEqual":"6.10.*","status":"unaffected","versionType":"semver"},{"version":"6.11.2","lessThanOrEqual":"6.11.*","status":"unaffected","versionType":"semver"},{"version":"6.12","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":"6.6","versionEndExcluding":"6.6.54"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.10.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.11.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.12"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/9fc60f2bdd43e758bdf0305c0fc83221419ddb3f"},{"url":"https://git.kernel.org/stable/c/cd595d87e5fdd2fc09ea69359aa85e7f12f4b97b"},{"url":"https://git.kernel.org/stable/c/39caf610a63786b3b0ef3348ac015edc19827d6a"},{"url":"https://git.kernel.org/stable/c/89a906dfa8c3b21b3e5360f73c49234ac1eb885b"}],"title":"ARM: 9410/1: vfp: Use asm volatile in fmrx/fmxr macros","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2024-47716","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-10-21T13:02:37.747830Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-10-21T13:04:18.288Z"}}]}}