Vulnerability-Lookup

FKIE_CVE-2026-23456

Vulnerability from fkie_nvd - Published: 2026-04-03 16:16 - Updated: 2026-05-26 14:41

Severity

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

Summary

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_h323: fix OOB read in decode_int() CONS case In decode_int(), the CONS case calls get_bits(bs, 2) to read a length value, then calls get_uint(bs, len) without checking that len bytes remain in the buffer. The existing boundary check only validates the 2 bits for get_bits(), not the subsequent 1-4 bytes that get_uint() reads. This allows a malformed H.323/RAS packet to cause a 1-4 byte slab-out-of-bounds read. Add a boundary check for len bytes after get_bits() and before get_uint().

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1e3a3593162c96e8a8de48b1e14f60c3b57fca8a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/41b417ff73a24b2c68134992cc44c88db27f482d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/52235bf88159a1ef16434ab49e47e99c8a09ab20	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6bce72daeccca9aa1746e92d6c3d4784e71f2ebb	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/774a434f8c9c8602a976b2536f65d0172a07f4d2	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a2cd54b9348e485d338b3c132338a4410c99afaf	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c95dc674ebf01ecfb40388b6facfc89b81fed3b7	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fb6c3596823ec5dd09c2123340330d7448f51a59	Patch

Impacted products

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

JSON

To clipboard

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          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
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          "userInteraction": "NONE",
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}

CVE-2026-23456 (GCVE-0-2026-23456)

Vulnerability from cvelistv5 – Published: 2026-04-03 15:15 – Updated: 2026-05-11 22:07

Title

netfilter: nf_conntrack_h323: fix OOB read in decode_int() CONS case

Summary

Severity

8.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/a2cd54b9348e485d3…
https://git.kernel.org/stable/c/c95dc674ebf01ecfb…
https://git.kernel.org/stable/c/41b417ff73a24b2c6…
https://git.kernel.org/stable/c/52235bf88159a1ef1…
https://git.kernel.org/stable/c/774a434f8c9c8602a…
https://git.kernel.org/stable/c/6bce72daeccca9aa1…
https://git.kernel.org/stable/c/fb6c3596823ec5dd0…
https://git.kernel.org/stable/c/1e3a3593162c96e8a…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < a2cd54b9348e485d338b3c132338a4410c99afaf (git) Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < c95dc674ebf01ecfb40388b6facfc89b81fed3b7 (git) Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < 41b417ff73a24b2c68134992cc44c88db27f482d (git) Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < 52235bf88159a1ef16434ab49e47e99c8a09ab20 (git) Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < 774a434f8c9c8602a976b2536f65d0172a07f4d2 (git) Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < 6bce72daeccca9aa1746e92d6c3d4784e71f2ebb (git) Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < fb6c3596823ec5dd09c2123340330d7448f51a59 (git) Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < 1e3a3593162c96e8a8de48b1e14f60c3b57fca8a (git)
Linux	Linux	Affected: 2.6.17 Unaffected: 0 , < 2.6.17 (semver) Unaffected: 5.10.253 , ≤ 5.10.* (semver) Unaffected: 5.15.203 , ≤ 5.15.* (semver) Unaffected: 6.1.167 , ≤ 6.1.* (semver) Unaffected: 6.6.130 , ≤ 6.6.* (semver) Unaffected: 6.12.78 , ≤ 6.12.* (semver) Unaffected: 6.18.20 , ≤ 6.18.* (semver) Unaffected: 6.19.10 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
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      "affected": [
        {
          "defaultStatus": "unaffected",
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          "programFiles": [
            "net/netfilter/nf_conntrack_h323_asn1.c"
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      "title": "netfilter: nf_conntrack_h323: fix OOB read in decode_int() CONS case",
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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-2026-23456

CVE-2026-23456 (GCVE-0-2026-23456)

Tags

Sightings

Nomenclature