{"id":"CVE-2023-53144","title":"erofs: fix wrong kunmap when using LZMA on HIGHMEM platforms","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix wrong kunmap when using LZMA on HIGHMEM platforms\n\nAs the call trace shown, the root cause is kunmap incorrect pages:\n\n BUG: kernel NULL pointer dereference,…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 622ceaddb7649ca328832f50ba1400af778d75fa < fa4056781ac067b5946c6811459e1a36842047fd","Linux >= 622ceaddb7649ca328832f50ba1400af778d75fa < 28aea8ae6cf212a5bf3ed962b27921e2029ad754","Linux >= 622ceaddb7649ca328832f50ba1400af778d75fa < 8f121dfb15f7b4ab345992ce96003eb63fd608f4","Linux 5.16"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:18:57.386630Z"},"published":"2025-05-02","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:21:04.705Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-53144","references":[{"url":"https://git.kernel.org/stable/c/fa4056781ac067b5946c6811459e1a36842047fd"},{"url":"https://git.kernel.org/stable/c/28aea8ae6cf212a5bf3ed962b27921e2029ad754"},{"url":"https://git.kernel.org/stable/c/8f121dfb15f7b4ab345992ce96003eb63fd608f4"}],"tags":["cve.org"],"epss":0.00185,"epssPercentile":0.08197,"ingestedAt":"2026-11-05T22:38:31.779Z","slug":"CVE-2023-53144","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix wrong kunmap when using LZMA on HIGHMEM platforms\n\nAs the call trace shown, the root cause is kunmap incorrect pages:\n\n BUG: kernel NULL pointer dereference, address: 00000000\n CPU: 1 PID: 40 Comm: kworker/u5:0 Not tainted 6.2.0-rc5 #4\n Workqueue: erofs_worker z_erofs_decompressqueue_work\n EIP: z_erofs_lzma_decompress+0x34b/0x8ac\n  z_erofs_decompress+0x12/0x14\n  z_erofs_decompress_queue+0x7e7/0xb1c\n  z_erofs_decompressqueue_work+0x32/0x60\n  process_one_work+0x24b/0x4d8\n  ? process_one_work+0x1a4/0x4d8\n  worker_thread+0x14c/0x3fc\n  kthread+0xe6/0x10c\n  ? rescuer_thread+0x358/0x358\n  ? kthread_complete_and_exit+0x18/0x18\n  ret_from_fork+0x1c/0x28\n ---[ end trace 0000000000000000 ]---\n\nThe bug is trivial and should be fixed now.  It has no impact on\n!HIGHMEM platforms.\n\n## Affected\n\n- `Linux >= 622ceaddb7649ca328832f50ba1400af778d75fa < fa4056781ac067b5946c6811459e1a36842047fd`\n- `Linux >= 622ceaddb7649ca328832f50ba1400af778d75fa < 28aea8ae6cf212a5bf3ed962b27921e2029ad754`\n- `Linux >= 622ceaddb7649ca328832f50ba1400af778d75fa < 8f121dfb15f7b4ab345992ce96003eb63fd608f4`\n- `Linux 5.16`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}