{"id":"CVE-2026-43289","title":"kexec: derive purgatory entry from symbol","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nkexec: derive purgatory entry from symbol\n\nkexec_load_purgatory() derives image->start by locating e_entry inside an\nSHF_EXECINSTR section.  If the purgatory object con…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= f368aed4827bd4276c0e3664fb2cb815a8d7caf3 < 027797595a108726f4a0a45d225f603b0ffbd22b","Linux >= d38e051ec6fd8650b139d9bc4b0b8b261953b263 < 1737d37ae1d2814e6cf0a1af87af3d41f0812b95","Linux >= 013027918a4efa807409fcb356009c117e4d181a < f736032c638a33a243e9126e617788f763d648f9","Linux >= 8652d44f466ad5772e7d1756e9457046189b0dfc < cfccd3b8c51bc57a8a6fcb2fd30453afae5bc0d2","Linux >= 8652d44f466ad5772e7d1756e9457046189b0dfc < 875355152b33436907c2a6d2ffad1431fa86c62b","Linux >= 8652d44f466ad5772e7d1756e9457046189b0dfc < 36eb314184a0ae74dd42914b47d2b9fc43be8034","Linux >= 8652d44f466ad5772e7d1756e9457046189b0dfc < 5226570bd252cea2e805a161cb0f75c204c3108a","Linux >= 8652d44f466ad5772e7d1756e9457046189b0dfc < 480e1d5c64bb14441f79f2eb9421d5e26f91ea3d","Linux 4947a0eb7d642b6048559857964966016ef3aa8b","Linux b16bf76b382810257e3fb6278663a9d131b70197","Linux cb1638618545182a01444b2b20a4ed6b9d2a8c8f","Linux >= 5.10.185 < 5.10.252","Linux >= 5.15.118 < 5.15.202","Linux >= 6.1.35 < 6.1.165","Linux >= 4.19.287 < 4.20","Linux >= 5.4.248 < 5.5","Linux >= 6.3.9 < 6.4","Linux 6.4"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T15:33:32.901478Z"},"published":"2026-05-08","updated":"2026-11-06","sourceUpdated":"2026-11-06T15:42:47.045Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43289","references":[{"url":"https://git.kernel.org/stable/c/027797595a108726f4a0a45d225f603b0ffbd22b"},{"url":"https://git.kernel.org/stable/c/1737d37ae1d2814e6cf0a1af87af3d41f0812b95"},{"url":"https://git.kernel.org/stable/c/f736032c638a33a243e9126e617788f763d648f9"},{"url":"https://git.kernel.org/stable/c/cfccd3b8c51bc57a8a6fcb2fd30453afae5bc0d2"},{"url":"https://git.kernel.org/stable/c/875355152b33436907c2a6d2ffad1431fa86c62b"},{"url":"https://git.kernel.org/stable/c/36eb314184a0ae74dd42914b47d2b9fc43be8034"},{"url":"https://git.kernel.org/stable/c/5226570bd252cea2e805a161cb0f75c204c3108a"},{"url":"https://git.kernel.org/stable/c/480e1d5c64bb14441f79f2eb9421d5e26f91ea3d"}],"tags":["cve.org"],"epss":0.00123,"epssPercentile":0.02061,"ingestedAt":"2026-11-06T15:54:03.950Z","slug":"CVE-2026-43289","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nkexec: derive purgatory entry from symbol\n\nkexec_load_purgatory() derives image->start by locating e_entry inside an\nSHF_EXECINSTR section.  If the purgatory object contains multiple\nexecutable sections with overlapping sh_addr, the entrypoint check can\nmatch more than once and trigger a WARN.\n\nDerive the entry section from the purgatory_start symbol when present and\ncompute image->start from its final placement.  Keep the existing e_entry\nfallback for purgatories that do not expose the symbol.\n\nWARNING: kernel/kexec_file.c:1009 at kexec_load_purgatory+0x395/0x3c0, CPU#10: kexec/1784\nCall Trace:\n <TASK>\n bzImage64_load+0x133/0xa00\n __do_sys_kexec_file_load+0x2b3/0x5c0\n do_syscall_64+0x81/0x610\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\n[me@linux.beauty: move helper to avoid forward declaration, per Baoquan]\n\n## Affected\n\n- `Linux >= f368aed4827bd4276c0e3664fb2cb815a8d7caf3 < 027797595a108726f4a0a45d225f603b0ffbd22b`\n- `Linux >= d38e051ec6fd8650b139d9bc4b0b8b261953b263 < 1737d37ae1d2814e6cf0a1af87af3d41f0812b95`\n- `Linux >= 013027918a4efa807409fcb356009c117e4d181a < f736032c638a33a243e9126e617788f763d648f9`\n- `Linux >= 8652d44f466ad5772e7d1756e9457046189b0dfc < cfccd3b8c51bc57a8a6fcb2fd30453afae5bc0d2`\n- `Linux >= 8652d44f466ad5772e7d1756e9457046189b0dfc < 875355152b33436907c2a6d2ffad1431fa86c62b`\n- `Linux >= 8652d44f466ad5772e7d1756e9457046189b0dfc < 36eb314184a0ae74dd42914b47d2b9fc43be8034`\n- `Linux >= 8652d44f466ad5772e7d1756e9457046189b0dfc < 5226570bd252cea2e805a161cb0f75c204c3108a`\n- `Linux >= 8652d44f466ad5772e7d1756e9457046189b0dfc < 480e1d5c64bb14441f79f2eb9421d5e26f91ea3d`\n- `Linux 4947a0eb7d642b6048559857964966016ef3aa8b`\n- `Linux b16bf76b382810257e3fb6278663a9d131b70197`\n- `Linux cb1638618545182a01444b2b20a4ed6b9d2a8c8f`\n- `Linux >= 5.10.185 < 5.10.252`\n- `Linux >= 5.15.118 < 5.15.202`\n- `Linux >= 6.1.35 < 6.1.165`\n- `Linux >= 4.19.287 < 4.20`\n- `Linux >= 5.4.248 < 5.5`\n- `Linux >= 6.3.9 < 6.4`\n- `Linux 6.4`\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":[]}