5.5

CVE-2026-43289

kexec: derive purgatory entry from symbol

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:
 <TASK>
 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]
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.19.287 < 4.20
Linux ≫ Linux Kernel Version >= 5.4.248 < 5.5
Linux ≫ Linux Kernel Version >= 5.10.185 < 5.10.252
Linux ≫ Linux Kernel Version >= 5.15.118 < 5.15.202
Linux ≫ Linux Kernel Version >= 6.1.35 < 6.1.165
Linux ≫ Linux Kernel Version >= 6.3.9 < 6.4
Linux ≫ Linux Kernel Version >= 6.4.1 < 6.6.128
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.75
Linux ≫ Linux Kernel Version >= 6.13 < 6.18.16
Linux ≫ Linux Kernel Version >= 6.19 < 6.19.6
Linux ≫ Linux Kernel Version6.4 Update-
Linux ≫ Linux Kernel Version6.4 Updaterc7
Linux ≫ Linux Kernel Version7.0 Updaterc1
Linux ≫ Linux Kernel Version7.0 Updaterc2
Linux ≫ Linux Kernel Version7.0 Updaterc3
Linux ≫ Linux Kernel Version7.0 Updaterc4
Linux ≫ Linux Kernel Version7.0 Updaterc5
Linux ≫ Linux Kernel Version7.0 Updaterc6
Linux ≫ Linux Kernel Version7.0 Updaterc7
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.12% 0.024
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/027797595a108726f4a0a45d225f603b0ffbd22b
Patch
https://git.kernel.org/stable/c/1737d37ae1d2814e6cf0a1af87af3d41f0812b95
Patch
https://git.kernel.org/stable/c/f736032c638a33a243e9126e617788f763d648f9
Patch
https://git.kernel.org/stable/c/cfccd3b8c51bc57a8a6fcb2fd30453afae5bc0d2
Patch
https://git.kernel.org/stable/c/875355152b33436907c2a6d2ffad1431fa86c62b
Patch
https://git.kernel.org/stable/c/36eb314184a0ae74dd42914b47d2b9fc43be8034
Patch
https://git.kernel.org/stable/c/5226570bd252cea2e805a161cb0f75c204c3108a
Patch
https://git.kernel.org/stable/c/480e1d5c64bb14441f79f2eb9421d5e26f91ea3d
Patch