{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-47428 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2021-47428 is a medium-severity memory corruption vulnerability in Linux kernel, published on 21 May 2024. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-47428 and fix it if it is affected.\n\nWhat it is: CVE-2021-47428 is a medium-severity memory corruption vulnerability in Linux kernel, published on 21 May 2024. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-47428 in the wild and no public exploit code.\n\nAffected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2021-47428/ (Markdown: https://insights.sbomify.com/CVE-2021-47428/index.md)","id":"CVE-2021-47428","markdown":"https://insights.sbomify.com/CVE-2021-47428/index.md","name":"CVE-2021-47428","record":{"aliases":["DEBIAN-CVE-2021-47428","GHSA-7457-jp56-wxrq","UBUNTU-CVE-2021-47428"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A flaw in the Linux kernel's PowerPC interrupt handling causes incorrect stack frame construction, potentially leading to system crashes or instability.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":5.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/64s: fix program check interrupt emergency stack path\n\nEmergency stack path was jumping into a 3: label inside the\n__GEN_COMMON_BODY macro for the normal path after it had finished,\nrather than jumping over it. By a small miracle this is the correct\nplace to build up a new interrupt frame with the existing stack\npointer, so things basically worked okay with an added weird looking\n700 trap frame on top (which had the wrong -\u003enip so it didn't decode\nbug messages either).\n\nFix this by avoiding using numeric labels when jumping over non-trivial\nmacros.\n\nBefore:\n\n LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 NUMA PowerNV\n Modules linked in:\n CPU: 0 PID: 88 Comm: sh Not tainted 5.15.0-rc2-00034-ge057cdade6e5 #2637\n NIP:  7265677368657265 LR: c00000000006c0c8 CTR: c0000000000097f0\n REGS: c0000000fffb3a50 TRAP: 0700   Not tainted\n MSR:  9000000000021031 \u003cSF,HV,ME,IR,DR,LE\u003e  CR: 00000700  XER: 20040000\n CFAR: c0000000000098b0 IRQMASK: 0\n GPR00: c00000000006c964 c0000000fffb3cf0 c000000001513800 0000000000000000\n GPR04: 0000000048ab0778 0000000042000000 0000000000000000 0000000000001299\n GPR08: 000001e447c718ec 0000000022424282 0000000000002710 c00000000006bee8\n GPR12: 9000000000009033 c0000000016b0000 00000000000000b0 0000000000000001\n GPR16: 0000000000000000 0000000000000002 0000000000000000 0000000000000ff8\n GPR20: 0000000000001fff 0000000000000007 0000000000000080 00007fff89d90158\n GPR24: 0000000002000000 0000000002000000 0000000000000255 0000000000000300\n GPR28: c000000001270000 0000000042000000 0000000048ab0778 c000000080647e80\n NIP [7265677368657265] 0x7265677368657265\n LR [c00000000006c0c8] ___do_page_fault+0x3f8/0xb10\n Call Trace:\n [c0000000fffb3cf0] [c00000000000bdac] soft_nmi_common+0x13c/0x1d0 (unreliable)\n --- interrupt: 700 at decrementer_common_virt+0xb8/0x230\n NIP:  c0000000000098b8 LR: c00000000006c0c8 CTR: c0000000000097f0\n REGS: c0000000fffb3d60 TRAP: 0700   Not tainted\n MSR:  9000000000021031 \u003cSF,HV,ME,IR,DR,LE\u003e  CR: 22424282  XER: 20040000\n CFAR: c0000000000098b0 IRQMASK: 0\n GPR00: c00000000006c964 0000000000002400 c000000001513800 0000000000000000\n GPR04: 0000000048ab0778 0000000042000000 0000000000000000 0000000000001299\n GPR08: 000001e447c718ec 0000000022424282 0000000000002710 c00000000006bee8\n GPR12: 9000000000009033 c0000000016b0000 00000000000000b0 0000000000000001\n GPR16: 0000000000000000 0000000000000002 0000000000000000 0000000000000ff8\n GPR20: 0000000000001fff 0000000000000007 0000000000000080 00007fff89d90158\n GPR24: 0000000002000000 0000000002000000 0000000000000255 0000000000000300\n GPR28: c000000001270000 0000000042000000 0000000048ab0778 c000000080647e80\n NIP [c0000000000098b8] decrementer_common_virt+0xb8/0x230\n LR [c00000000006c0c8] ___do_page_fault+0x3f8/0xb10\n --- interrupt: 700\n Instruction dump:\n XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX\n XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX\n ---[ end trace 6d28218e0cc3c949 ]---\n\nAfter:\n\n ------------[ cut here ]------------\n kernel BUG at arch/powerpc/kernel/exceptions-64s.S:491!\n Oops: Exception in kernel mode, sig: 5 [#1]\n LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 NUMA PowerNV\n Modules linked in:\n CPU: 0 PID: 88 Comm: login Not tainted 5.15.0-rc2-00034-ge057cdade6e5-dirty #2638\n NIP:  c0000000000098b8 LR: c00000000006bf04 CTR: c0000000000097f0\n REGS: c0000000fffb3d60 TRAP: 0700   Not tainted\n MSR:  9000000000021031 \u003cSF,HV,ME,IR,DR,LE\u003e  CR: 24482227  XER: 00040000\n CFAR: c0000000000098b0 IRQMASK: 0\n GPR00: c00000000006bf04 0000000000002400 c000000001513800 c000000001271868\n GPR04: 00000000100f0d29 0000000042000000 0000000000000007 0000000000000009\n GPR08: 00000000100f0d29 0000000024482227 0000000000002710 c000000000181b3c\n GPR12: 9000000000009033 c0000000016b0000 00000000100f0d29 c000000005b22f00\n GPR16: 00000000ffff0000 0000000000000001 0000000000000009 00000000100eed90\n GPR20: 00000000100eed90 00000\n---truncated---","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"powerpc/64s: fix program check interrupt emergency stack path","id":"CVE-2021-47428","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"memory_corruption","year":"2021"},"n_packages":0,"n_references":3,"next":{"headline":"powerpc/64s: Fix unrecoverable MCE calling async handler from NMI","id":"CVE-2021-47429"},"packages":[],"prev":{"headline":"scsi: iscsi: Fix iscsi_task use after free","id":"CVE-2021-47427"},"products":["Linux"],"published":"2024-05-21","related":[{"cvss_score":8.8,"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266","kev_date_added":"2026-09-18","published":"2026-06-25"},{"cvss_score":8.8,"headline":"Linux Kernel Improper Input Validation","id":"CVE-2013-6282","kev_date_added":"2022-09-15","published":"2013-11-19"},{"cvss_score":8.4,"headline":"Linux Kernel Heap-Based Buffer Overflow","id":"CVE-2022-0185","kev_date_added":"2024-08-21","published":"2022-02-11"},{"cvss_score":8.4,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2013-2094","kev_date_added":"2022-09-15","published":"2013-05-14"},{"cvss_score":7.8,"headline":"Linux Kernel Unspecified","id":"CVE-2026-53362","kev_date_added":"2026-08-27","published":"2026-07-04"},{"cvss_score":7.8,"headline":"Linux Kernel Missing Initialization of a Variable","id":"CVE-2026-46300","kev_date_added":"2026-10-28","published":"2026-05-23"},{"cvss_score":7.8,"headline":"Linux Kernel Race Condition","id":"CVE-2025-39964","kev_date_added":"2026-09-18","published":"2025-10-13"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-11","vendors":["Linux"]},"summary":"A flaw in the Linux kernel's PowerPC interrupt handling causes incorrect stack frame construction, potentially leading to system crashes or instability.","url":"https://insights.sbomify.com/CVE-2021-47428/"}