Vulnerability-Lookup

FKIE_CVE-2026-43109

Vulnerability from fkie_nvd - Published: 2026-05-06 10:16 - Updated: 2026-05-17 16:16

Severity ?

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: x86: shadow stacks: proper error handling for mmap lock 김영민 reports that shstk_pop_sigframe() doesn't check for errors from mmap_read_lock_killable(), which is a silly oversight, and also shows that we haven't marked those functions with "__must_check", which would have immediately caught it. So let's fix both issues.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1a30468eff661937d978495644d2e5ebfeef5ce6
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/262b6d38a81d51b135db81e1f30c13d30e38feee	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/52f657e34d7b21b47434d9d8b26fa7f6778b63a0	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c79cf42321600e931933e11f94aba8b245d4cd66

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

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    }
  ],
  "id": "CVE-2026-43109",
  "lastModified": "2026-05-17T16:16:16.517",
  "metrics": {
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          "attackVector": "LOCAL",
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          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
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        "impactScore": 3.6,
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}

CVE-2026-43109 (GCVE-0-2026-43109)

Vulnerability from cvelistv5 – Published: 2026-05-06 07:40 – Updated: 2026-05-17 15:21

Title

x86: shadow stacks: proper error handling for mmap lock

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/c79cf42321600e931…
https://git.kernel.org/stable/c/1a30468eff661937d…
https://git.kernel.org/stable/c/c64cebcc5c4f223db…
https://git.kernel.org/stable/c/262b6d38a81d51b13…
https://git.kernel.org/stable/c/52f657e34d7b21b47…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 7fad2a432cd35bbf104d2d9d426e74902f22aa95 , < c79cf42321600e931933e11f94aba8b245d4cd66 (git) Affected: 7fad2a432cd35bbf104d2d9d426e74902f22aa95 , < 1a30468eff661937d978495644d2e5ebfeef5ce6 (git) Affected: 7fad2a432cd35bbf104d2d9d426e74902f22aa95 , < c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4 (git) Affected: 7fad2a432cd35bbf104d2d9d426e74902f22aa95 , < 262b6d38a81d51b135db81e1f30c13d30e38feee (git) Affected: 7fad2a432cd35bbf104d2d9d426e74902f22aa95 , < 52f657e34d7b21b47434d9d8b26fa7f6778b63a0 (git)
Linux	Linux	Affected: 6.6 Unaffected: 0 , < 6.6 (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.88 , ≤ 6.12.* (semver) Unaffected: 6.18.24 , ≤ 6.18.* (semver) Unaffected: 6.19.14 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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        {
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          "programFiles": [
            "arch/x86/kernel/shstk.c",
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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.

Action not permitted

FKIE_CVE-2026-43109

CVE-2026-43109 (GCVE-0-2026-43109)

Tags

Sightings

Nomenclature