Vulnerability-Lookup

FKIE_CVE-2026-43452

Vulnerability from fkie_nvd - Published: 2026-05-08 15:16 - Updated: 2026-05-21 16:54

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: x_tables: guard option walkers against 1-byte tail reads When the last byte of options is a non-single-byte option kind, walkers that advance with i += op[i + 1] ? : 1 can read op[i + 1] past the end of the option area. Add an explicit i == optlen - 1 check before dereferencing op[i + 1] in xt_tcpudp and xt_dccp option walkers.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5b18b8b35c7cded2d17b2b2604c9b0694ff48d1c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9b94f0e42ed248eb31929da84ed9f5310d7ff540	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ae1e1267650638136b84c23f2b31250f0ccb6823	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/bc18551c6169eac5ed813778d3e3e484002dbbe5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c2a445367a496a3c25dbc940c10c8bd1cfd4c14a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c39f84e4be1be63fc60ca7141ea7b76edcea5907	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/cfe770220ac2dbd3e104c6b45094037455da81d4	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d04800323336eebf441d153f43234eac9b833d36	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

JSON

To clipboard

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}

CVE-2026-43452 (GCVE-0-2026-43452)

Vulnerability from cvelistv5 – Published: 2026-05-08 14:22 – Updated: 2026-05-11 22:24

Title

netfilter: x_tables: guard option walkers against 1-byte tail reads

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/c2a445367a496a3c2…
https://git.kernel.org/stable/c/ae1e1267650638136…
https://git.kernel.org/stable/c/c39f84e4be1be63fc…
https://git.kernel.org/stable/c/9b94f0e42ed248eb3…
https://git.kernel.org/stable/c/5b18b8b35c7cded2d…
https://git.kernel.org/stable/c/bc18551c6169eac5e…
https://git.kernel.org/stable/c/d04800323336eebf4…
https://git.kernel.org/stable/c/cfe770220ac2dbd3e…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 2e4e6a17af35be359cc8f1c924f8f198fbd478cc , < c2a445367a496a3c25dbc940c10c8bd1cfd4c14a (git) Affected: 2e4e6a17af35be359cc8f1c924f8f198fbd478cc , < ae1e1267650638136b84c23f2b31250f0ccb6823 (git) Affected: 2e4e6a17af35be359cc8f1c924f8f198fbd478cc , < c39f84e4be1be63fc60ca7141ea7b76edcea5907 (git) Affected: 2e4e6a17af35be359cc8f1c924f8f198fbd478cc , < 9b94f0e42ed248eb31929da84ed9f5310d7ff540 (git) Affected: 2e4e6a17af35be359cc8f1c924f8f198fbd478cc , < 5b18b8b35c7cded2d17b2b2604c9b0694ff48d1c (git) Affected: 2e4e6a17af35be359cc8f1c924f8f198fbd478cc , < bc18551c6169eac5ed813778d3e3e484002dbbe5 (git) Affected: 2e4e6a17af35be359cc8f1c924f8f198fbd478cc , < d04800323336eebf441d153f43234eac9b833d36 (git) Affected: 2e4e6a17af35be359cc8f1c924f8f198fbd478cc , < cfe770220ac2dbd3e104c6b45094037455da81d4 (git)
Linux	Linux	Affected: 2.6.16 Unaffected: 0 , < 2.6.16 (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: 6.18.19 , ≤ 6.18.* (semver) Unaffected: 6.19.9 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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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-2026-43452

CVE-2026-43452 (GCVE-0-2026-43452)

Tags

Sightings

Nomenclature