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CVE-2026-43289 (GCVE-0-2026-43289)

Vulnerability from cvelistv5 – Published: 2026-05-08 13:11 – Updated: 2026-05-23 16:06
VLAI
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: <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]
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f368aed4827bd4276c0e3664fb2cb815a8d7caf3 , < 027797595a108726f4a0a45d225f603b0ffbd22b (git)
Affected: d38e051ec6fd8650b139d9bc4b0b8b261953b263 , < 1737d37ae1d2814e6cf0a1af87af3d41f0812b95 (git)
Affected: 013027918a4efa807409fcb356009c117e4d181a , < f736032c638a33a243e9126e617788f763d648f9 (git)
Affected: 8652d44f466ad5772e7d1756e9457046189b0dfc , < cfccd3b8c51bc57a8a6fcb2fd30453afae5bc0d2 (git)
Affected: 8652d44f466ad5772e7d1756e9457046189b0dfc , < 875355152b33436907c2a6d2ffad1431fa86c62b (git)
Affected: 8652d44f466ad5772e7d1756e9457046189b0dfc , < 36eb314184a0ae74dd42914b47d2b9fc43be8034 (git)
Affected: 8652d44f466ad5772e7d1756e9457046189b0dfc , < 5226570bd252cea2e805a161cb0f75c204c3108a (git)
Affected: 8652d44f466ad5772e7d1756e9457046189b0dfc , < 480e1d5c64bb14441f79f2eb9421d5e26f91ea3d (git)
Affected: 4947a0eb7d642b6048559857964966016ef3aa8b (git)
Affected: b16bf76b382810257e3fb6278663a9d131b70197 (git)
Affected: cb1638618545182a01444b2b20a4ed6b9d2a8c8f (git)
Affected: 5.10.185 , < 5.10.252 (semver)
Affected: 5.15.118 , < 5.15.202 (semver)
Affected: 6.1.35 , < 6.1.165 (semver)
Affected: 4.19.287 , < 4.20 (semver)
Affected: 5.4.248 , < 5.5 (semver)
Affected: 6.3.9 , < 6.4 (semver)
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Linux Linux Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 5.10.252 , ≤ 5.10.* (semver)
Unaffected: 5.15.202 , ≤ 5.15.* (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.16 , ≤ 6.18.* (semver)
Unaffected: 6.19.6 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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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 \u003cTASK\u003e\\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]\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"kernel/kexec_file.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"f368aed4827bd4276c0e3664fb2cb815a8d7caf3\",\"lessThan\":\"027797595a108726f4a0a45d225f603b0ffbd22b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d38e051ec6fd8650b139d9bc4b0b8b261953b263\",\"lessThan\":\"1737d37ae1d2814e6cf0a1af87af3d41f0812b95\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"013027918a4efa807409fcb356009c117e4d181a\",\"lessThan\":\"f736032c638a33a243e9126e617788f763d648f9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8652d44f466ad5772e7d1756e9457046189b0dfc\",\"lessThan\":\"cfccd3b8c51bc57a8a6fcb2fd30453afae5bc0d2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8652d44f466ad5772e7d1756e9457046189b0dfc\",\"lessThan\":\"875355152b33436907c2a6d2ffad1431fa86c62b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8652d44f466ad5772e7d1756e9457046189b0dfc\",\"lessThan\":\"36eb314184a0ae74dd42914b47d2b9fc43be8034\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8652d44f466ad5772e7d1756e9457046189b0dfc\",\"lessThan\":\"5226570bd252cea2e805a161cb0f75c204c3108a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8652d44f466ad5772e7d1756e9457046189b0dfc\",\"lessThan\":\"480e1d5c64bb14441f79f2eb9421d5e26f91ea3d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4947a0eb7d642b6048559857964966016ef3aa8b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b16bf76b382810257e3fb6278663a9d131b70197\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"cb1638618545182a01444b2b20a4ed6b9d2a8c8f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.10.185\",\"lessThan\":\"5.10.252\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.15.118\",\"lessThan\":\"5.15.202\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.1.35\",\"lessThan\":\"6.1.165\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.19.287\",\"lessThan\":\"4.20\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.4.248\",\"lessThan\":\"5.5\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.3.9\",\"lessThan\":\"6.4\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"kernel/kexec_file.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.4\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.4\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.252\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.202\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.165\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.128\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.75\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.16\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19.6\",\"lessThanOrEqual\":\"6.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.19.287\",\"versionEndExcluding\":\"4.20\",\"matchCriteriaId\":\"5245350E-E545-446D-A6C0-2E989F3977CB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.4.248\",\"versionEndExcluding\":\"5.5\",\"matchCriteriaId\":\"DB73E6A2-799F-4F3F-A41F-D941488D5BBE\"},{\"vulnerable\":true,\"criteria\":\"c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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-28T11:35:34+00:00",
      "cve": "CVE-2026-43289",
      "id": "CVE-2026-43289",
      "initial_release_date": "2026-05-08T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: kexec: derive purgatory entry from symbol",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43289.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-05-24T00:50:23Z",
      "cve": "CVE-2026-43289",
      "id": "CVE-2026-43289",
      "initial_release_date": "2026-05-12T03:31:17Z",
      "product_status:known_affected": "102",
      "product_status:known_not_affected": "125",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-43289",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-43289.json",
      "version": "3"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.