---
id: CVE-2026-43289
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 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'
---

## Overview

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]

## 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`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.