UnratedFix available
kexec: derive purgatory entry from symbol
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: kexec: derive purgatory entry from symbol kexec_load_purgatory() derives image->start by locating e_entry inside an SHF_EXECINSTR section. If the purgatory object contains multiple executable sections with overlapping sh_addr, the entrypoint check can match more than once and trigger a WARN. Derive the entry section from the purgatory_start symbol when present and compute image->start from its final placement. Keep the existing e_entry fallback for purgatories that do not expose the symbol. WARNING: kernel/kexec_file.c:1009 at kexec_load_purgatory+0x395/0x3c0, CPU#10: kexec/1784 Call Trace: bzImage64_load+0x133/0xa00 __do_sys_kexec_file_load+0x2b3/0x5c0 do_syscall_64+0x81/0x610 entry_SYSCALL_64_after_hwframe+0x76/0x7e [me@linux.beauty: move helper to avoid forward declaration, per Baoquan]
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.252, 5.15.202, 6.1.165, 6.12.75, 6.18.16, 6.19.6, 6.6.128
- CVEs
- CVE-2026-43289
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 6 Nov 2026, 18:38 UTC · Revision 1
Source evidence
In the Linux kernel, the following vulnerability has been resolved: kexec: derive purgatory entry from symbol kexec_load_purgatory() derives image->start by locating e_entry inside an SHF_EXECINSTR section. If the purgatory object contains multiple executable sections with overlapping sh_addr, the entrypoint check can match more than once and trigger a WARN. Derive the entry section from the purgatory_start symbol when present and compute image->start from its final placement. Keep the existing e_entry fallback for purgatories that do not expose the symbol. WARNING: kernel/kexec_file.c:1009 at kexec_load_purgatory+0x395/0x3c0, CPU#10: kexec/1784 Call Trace: bzImage64_load+0x133/0xa00 __do_sys_kexec_file_load+0x2b3/0x5c0 do_syscall_64+0x81/0x610 entry_SYSCALL_64_after_hwframe+0x76/0x7e [me@linux.beauty: move helper to avoid forward declaration, per Baoquan]
osv:CVE-2026-43289
Kernel
Fixed versions: 5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.16, 6.19.6
Complete source record
{
"id": "a5f4790920df3563edbaa98e4a610eb024883cc43fa10af8f693fda6f9276d7c",
"url": "https://osv.dev/vulnerability/CVE-2026-43289",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "kexec: derive purgatory entry from symbol",
"summary": "In the Linux kernel, the following vulnerability has been resolved: kexec: derive purgatory entry from symbol kexec_load_purgatory() derives image->start by locating e_entry inside an SHF_EXECINSTR section. If the purgatory object contains multiple executable sections with overlapping sh_addr, the entrypoint check can match more than once and trigger a WARN. Derive the entry section from the purgatory_start symbol when present and compute image->start from its final placement. Keep the existing e_entry fallback for purgatories that do not expose the symbol. WARNING: kernel/kexec_file.c:1009 at kexec_load_purgatory+0x395/0x3c0, CPU#10: kexec/1784 Call Trace: bzImage64_load+0x133/0xa00 __do_sys_kexec_file_load+0x2b3/0x5c0 do_syscall_64+0x81/0x610 entry_SYSCALL_64_after_hwframe+0x76/0x7e [me@linux.beauty: move helper to avoid forward declaration, per Baoquan]",
"evidence": "osv:CVE-2026-43289",
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],
"modified": "2026-10-28T02:30:47.895453062Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/027797595a108726f4a0a45d225f603b0ffbd22b",
"https://git.kernel.org/stable/c/1737d37ae1d2814e6cf0a1af87af3d41f0812b95",
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"https://git.kernel.org/stable/c/f736032c638a33a243e9126e617788f763d648f9",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43289.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-43289",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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},
"source_id": "core-osv",
"document_id": 515900,
"published_at": "2026-05-08T13:11:13.86+00:00"
}