{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-52499 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2023-52499 is a medium-severity memory corruption vulnerability in Linux kernel, published on 2 Mar 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-2023-52499 and fix it if it is affected.\n\nWhat it is: CVE-2023-52499 is a medium-severity memory corruption vulnerability in Linux kernel, published on 2 Mar 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-2023-52499 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-2023-52499/ (Markdown: https://insights.sbomify.com/CVE-2023-52499/index.md)","id":"CVE-2023-52499","markdown":"https://insights.sbomify.com/CVE-2023-52499/index.md","name":"CVE-2023-52499","record":{"aliases":["BELL-CVE-2023-52499","DEBIAN-CVE-2023-52499","GHSA-8w3f-mchr-v6jh","UBUNTU-CVE-2023-52499"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service","code_execution"],"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 47x syscall return logic causes a crash or potential code execution due to incorrect register usage during instruction cache flushes.","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/47x: Fix 47x syscall return crash\n\nEddie reported that newer kernels were crashing during boot on his 476\nFSP2 system:\n\n  kernel tried to execute user page (b7ee2000) - exploit attempt? (uid: 0)\n  BUG: Unable to handle kernel instruction fetch\n  Faulting instruction address: 0xb7ee2000\n  Oops: Kernel access of bad area, sig: 11 [#1]\n  BE PAGE_SIZE=4K FSP-2\n  Modules linked in:\n  CPU: 0 PID: 61 Comm: mount Not tainted 6.1.55-d23900f.ppcnf-fsp2 #1\n  Hardware name: ibm,fsp2 476fpe 0x7ff520c0 FSP-2\n  NIP:  b7ee2000 LR: 8c008000 CTR: 00000000\n  REGS: bffebd83 TRAP: 0400   Not tainted (6.1.55-d23900f.ppcnf-fs p2)\n  MSR:  00000030 \u003cIR,DR\u003e  CR: 00001000  XER: 20000000\n  GPR00: c00110ac bffebe63 bffebe7e bffebe88 8c008000 00001000 00000d12 b7ee2000\n  GPR08: 00000033 00000000 00000000 c139df10 48224824 1016c314 10160000 00000000\n  GPR16: 10160000 10160000 00000008 00000000 10160000 00000000 10160000 1017f5b0\n  GPR24: 1017fa50 1017f4f0 1017fa50 1017f740 1017f630 00000000 00000000 1017f4f0\n  NIP [b7ee2000] 0xb7ee2000\n  LR [8c008000] 0x8c008000\n  Call Trace:\n  Instruction dump:\n  XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX\n  XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX\n  ---[ end trace 0000000000000000 ]---\n\nThe problem is in ret_from_syscall where the check for\nicache_44x_need_flush is done. When the flush is needed the code jumps\nout-of-line to do the flush, and then intends to jump back to continue\nthe syscall return.\n\nHowever the branch back to label 1b doesn't return to the correct\nlocation, instead branching back just prior to the return to userspace,\ncausing bogus register values to be used by the rfi.\n\nThe breakage was introduced by commit 6f76a01173cc\n(\"powerpc/syscall: implement system call entry/exit logic in C for PPC32\") which\ninadvertently removed the \"1\" label and reused it elsewhere.\n\nFix it by adding named local labels in the correct locations. Note that\nthe return label needs to be outside the ifdef so that CONFIG_PPC_47x=n\ncompiles.","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/47x: Fix 47x syscall return crash","id":"CVE-2023-52499","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"memory_corruption","year":"2023"},"n_packages":0,"n_references":4,"next":{"headline":"scsi: pm80xx: Avoid leaking tags when processing OPC_INB_SET_CONTROLLER_CONFIG command","id":"CVE-2023-52500"},"packages":[],"prev":{"headline":"PM: sleep: Fix possible deadlocks in core system-wide PM code","id":"CVE-2023-52498"},"products":["Linux"],"published":"2024-03-02","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 47x syscall return logic causes a crash or potential code execution due to incorrect register usage during instruction cache flushes.","url":"https://insights.sbomify.com/CVE-2023-52499/"}