Vulnerability-Lookup

SUSE-SU-2026:3392-1

Vulnerability from csaf_suse - Published: 2026-07-28 17:03 - Updated: 2026-07-28 17:03

Summary

Security update for the Linux Kernel (Live Patch 18 for SUSE Linux Enterprise 15 SP7)

Severity

Important

Notes

Title of the patch: Security update for the Linux Kernel (Live Patch 18 for SUSE Linux Enterprise 15 SP7)

Description of the patch: This update for the SUSE Linux Enterprise Kernel 6.4.0-150700.53.66 fixes various security issues: The following security issues were fixed: - CVE-2026-53366: ipv4: account for fraggap on the paged allocation path (bsc#1271370).

Patchnames: SUSE-2026-3392,SUSE-SLE-Module-Live-Patching-15-SP7-2026-3392

CVE-2026-53366

8.5 (High)


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

Affected products

Recommended 3 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_66-default-2-150700.2.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_66-default-2-150700.2.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_66-default-2-150700.2.1.x86_64	—	Vendor Fix

Threats

Impact important

References

9 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/s…	self
https://www.suse.com/support/update/announcement/…	self
https://lists.suse.com/pipermail/sle-updates/2026…	self
https://bugzilla.suse.com/1271370	self
https://www.suse.com/security/cve/CVE-2026-53366/	self
https://www.suse.com/security/cve/CVE-2026-53366	external
https://bugzilla.suse.com/1271366	external
https://bugzilla.suse.com/1271370	external

JSON

To clipboard

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        {
          "category": "general",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: account for fraggap on the paged allocation path\n\nIn __ip_append_data(), when the paged-allocation branch is taken,\nalloclen and pagedlen are computed as\n\n\talloclen = fragheaderlen + transhdrlen;\n\tpagedlen = datalen - transhdrlen;\n\ndatalen already includes fraggap, but the fraggap bytes carried over\nfrom the previous skb are copied into the new skb\u0027s linear area at\noffset transhdrlen by the subsequent skb_copy_and_csum_bits(). The\nlinear area is therefore undersized by fraggap bytes while pagedlen is\noverstated by the same amount.\n\nThe non-paged branch sets alloclen to fraglen, which already accounts\nfor fraggap because datalen does. Bring the paged branch in line by\nadding fraggap to alloclen and subtracting it from pagedlen.\n\nAfter this adjustment, copy no longer collapses to -fraggap on the\npaged path, so remove the stale comment describing that old arithmetic.",
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}

CVE-2026-53366 (GCVE-0-2026-53366)

Vulnerability from cvelistv5 – Published: 2026-07-16 05:13 – Updated: 2026-07-24 14:33

Title

ipv4: account for fraggap on the paged allocation path

Summary

In the Linux kernel, the following vulnerability has been resolved: ipv4: account for fraggap on the paged allocation path In __ip_append_data(), when the paged-allocation branch is taken, alloclen and pagedlen are computed as alloclen = fragheaderlen + transhdrlen; pagedlen = datalen - transhdrlen; datalen already includes fraggap, but the fraggap bytes carried over from the previous skb are copied into the new skb's linear area at offset transhdrlen by the subsequent skb_copy_and_csum_bits(). The linear area is therefore undersized by fraggap bytes while pagedlen is overstated by the same amount. The non-paged branch sets alloclen to fraglen, which already accounts for fraggap because datalen does. Bring the paged branch in line by adding fraggap to alloclen and subtracting it from pagedlen. After this adjustment, copy no longer collapses to -fraggap on the paged path, so remove the stale comment describing that old arithmetic.

Severity

7.8 (High)


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

Assigner

Linux

References

6 references

URL	Tags
https://git.kernel.org/stable/c/5c6375bced6147ec2…
https://git.kernel.org/stable/c/ce494707a9c07f27c…
https://git.kernel.org/stable/c/a9c24eda24bd15f43…
https://git.kernel.org/stable/c/77798d7be6ef71e72…
https://git.kernel.org/stable/c/c04d9ece23deb9e26…
https://git.kernel.org/stable/c/eca856950f7cb1a22…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 8eb77cc73977d88787b37c92831b1c242e035396 , < 5c6375bced6147ec2e460ee3b653f4860d5ecdc2 (git) Affected: 8eb77cc73977d88787b37c92831b1c242e035396 , < ce494707a9c07f27c219ca67f3e138061f53d9b3 (git) Affected: 8eb77cc73977d88787b37c92831b1c242e035396 , < a9c24eda24bd15f432e37824e6fc440977cb241c (git) Affected: 8eb77cc73977d88787b37c92831b1c242e035396 , < 77798d7be6ef71e72fb6fc8a2901bf74ebc9706f (git) Affected: 8eb77cc73977d88787b37c92831b1c242e035396 , < c04d9ece23deb9e26c19f9ca215e98b3295aa1bb (git) Affected: 8eb77cc73977d88787b37c92831b1c242e035396 , < eca856950f7cb1a221e02b99d758409f2c5cec42 (git)
Linux	Linux	Affected: 6.0 Unaffected: 0 , < 6.0 (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5c6375bced6147ec2e460ee3b653f4860d5ecdc2"
        },
        {
          "url": "https://git.kernel.org/stable/c/ce494707a9c07f27c219ca67f3e138061f53d9b3"
        },
        {
          "url": "https://git.kernel.org/stable/c/a9c24eda24bd15f432e37824e6fc440977cb241c"
        },
        {
          "url": "https://git.kernel.org/stable/c/77798d7be6ef71e72fb6fc8a2901bf74ebc9706f"
        },
        {
          "url": "https://git.kernel.org/stable/c/c04d9ece23deb9e26c19f9ca215e98b3295aa1bb"
        },
        {
          "url": "https://git.kernel.org/stable/c/eca856950f7cb1a221e02b99d758409f2c5cec42"
        }
      ],
      "title": "ipv4: account for fraggap on the paged allocation path",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53366",
    "datePublished": "2026-07-16T05:13:40.893Z",
    "dateReserved": "2026-06-09T07:44:35.400Z",
    "dateUpdated": "2026-07-24T14:33:54.829Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

SUSE-SU-2026:3392-1

CVE-2026-53366 (GCVE-0-2026-53366)

Tags

Sightings

Nomenclature