{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-53326 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2023-53326 is a medium-severity vulnerability in Linux kernel, published on 16 Sep 2025. 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-2023-53326 and fix it if it is affected.\n\nWhat it is: CVE-2023-53326 is a medium-severity vulnerability in Linux kernel, published on 16 Sep 2025. 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-2023-53326 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-2023-53326/ (Markdown: https://insights.sbomify.com/CVE-2023-53326/index.md)","id":"CVE-2023-53326","markdown":"https://insights.sbomify.com/CVE-2023-53326/index.md","name":"CVE-2023-53326","record":{"aliases":["BELL-CVE-2023-53326","DEBIAN-CVE-2023-53326","GHSA-xr8h-4cmg-pxjm","UBUNTU-CVE-2023-53326"],"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 local attacker can trigger a kernel crash by causing a coredump on a PF_IO_WORKER task with NULL pt_regs, leading to denial of service.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":5.5,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc: Don't try to copy PPR for task with NULL pt_regs\n\npowerpc sets up PF_KTHREAD and PF_IO_WORKER with a NULL pt_regs, which\nfrom my (arguably very short) checking is not commonly done for other\narchs. This is fine, except when PF_IO_WORKER's have been created and\nthe task does something that causes a coredump to be generated. Then we\nget this crash:\n\n  Kernel attempted to read user page (160) - exploit attempt? (uid: 1000)\n  BUG: Kernel NULL pointer dereference on read at 0x00000160\n  Faulting instruction address: 0xc0000000000c3a60\n  Oops: Kernel access of bad area, sig: 11 [#1]\n  LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=32 NUMA pSeries\n  Modules linked in: bochs drm_vram_helper drm_kms_helper xts binfmt_misc ecb ctr syscopyarea sysfillrect cbc sysimgblt drm_ttm_helper aes_generic ttm sg libaes evdev joydev virtio_balloon vmx_crypto gf128mul drm dm_mod fuse loop configfs drm_panel_orientation_quirks ip_tables x_tables autofs4 hid_generic usbhid hid xhci_pci xhci_hcd usbcore usb_common sd_mod\n  CPU: 1 PID: 1982 Comm: ppc-crash Not tainted 6.3.0-rc2+ #88\n  Hardware name: IBM pSeries (emulated by qemu) POWER9 (raw) 0x4e1202 0xf000005 of:SLOF,HEAD hv:linux,kvm pSeries\n  NIP:  c0000000000c3a60 LR: c000000000039944 CTR: c0000000000398e0\n  REGS: c0000000041833b0 TRAP: 0300   Not tainted  (6.3.0-rc2+)\n  MSR:  800000000280b033 \u003cSF,VEC,VSX,EE,FP,ME,IR,DR,RI,LE\u003e  CR: 88082828  XER: 200400f8\n  ...\n  NIP memcpy_power7+0x200/0x7d0\n  LR  ppr_get+0x64/0xb0\n  Call Trace:\n    ppr_get+0x40/0xb0 (unreliable)\n    __regset_get+0x180/0x1f0\n    regset_get_alloc+0x64/0x90\n    elf_core_dump+0xb98/0x1b60\n    do_coredump+0x1c34/0x24a0\n    get_signal+0x71c/0x1410\n    do_notify_resume+0x140/0x6f0\n    interrupt_exit_user_prepare_main+0x29c/0x320\n    interrupt_exit_user_prepare+0x6c/0xa0\n    interrupt_return_srr_user+0x8/0x138\n\nBecause ppr_get() is trying to copy from a PF_IO_WORKER with a NULL\npt_regs.\n\nCheck for a valid pt_regs in both ppc_get/ppr_set, and return an error\nif not set. The actual error value doesn't seem to be important here, so\njust pick -EINVAL.\n\n[mpe: Trim oops in change log, add Fixes \u0026 Cc stable]","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: Don't try to copy PPR for task with NULL pt_regs","id":"CVE-2023-53326","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"null_dereference","year":"2023"},"n_packages":0,"n_references":5,"next":{"headline":"iommufd/selftest: Catch overflow of uptr and length","id":"CVE-2023-53327"},"packages":[],"prev":{"headline":"drm/mediatek: dp: Change logging to dev for mtk_dp_aux_transfer()","id":"CVE-2023-53325"},"products":["Linux"],"published":"2025-09-16","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":"CWE Terms of Use","name":"CWE (MITRE)"},{"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 local attacker can trigger a kernel crash by causing a coredump on a PF_IO_WORKER task with NULL pt_regs, leading to denial of service.","url":"https://insights.sbomify.com/CVE-2023-53326/"}