Vulnerability-Lookup

SUSE-SU-2026:3372-1

Vulnerability from csaf_suse - Published: 2026-07-28 14:33 - Updated: 2026-07-28 14:33

Summary

Security update for the Linux Kernel (Live Patch 16 for SUSE Linux Enterprise 15 SP7)

Severity

Important

Notes

Title of the patch: Security update for the Linux Kernel (Live Patch 16 for SUSE Linux Enterprise 15 SP7)

Description of the patch: This update for the SUSE Linux Enterprise Kernel 6.4.0-150700.53.60 fixes various security issues: The following security issues were fixed: - CVE-2026-53359: KVM: x86: Fix shadow paging use-after-free due to unexpected role (bsc#1270060). - CVE-2026-53366: ipv4: account for fraggap on the paged allocation path (bsc#1271370).

Patchnames: SUSE-2026-3371,SUSE-2026-3372,SUSE-SLE-Module-Live-Patching-15-SP6-2026-3371,SUSE-SLE-Module-Live-Patching-15-SP7-2026-3373

CVE-2026-53359

8.8 (High)


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

Affected products

Recommended 6 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_115-default-3-150600.2.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_115-default-3-150600.2.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_115-default-3-150600.2.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_60-default-3-150700.2.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_60-default-3-150700.2.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_60-default-3-150700.2.1.x86_64	—	Vendor Fix

Threats

Impact important

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 6 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_115-default-3-150600.2.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_115-default-3-150600.2.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_115-default-3-150600.2.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_60-default-3-150700.2.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_60-default-3-150700.2.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_60-default-3-150700.2.1.x86_64	—	Vendor Fix

Threats

Impact important

References

15 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-security-upd…	self
https://bugzilla.suse.com/1270060	self
https://bugzilla.suse.com/1271370	self
https://www.suse.com/security/cve/CVE-2026-53359/	self
https://www.suse.com/security/cve/CVE-2026-53366/	self
https://www.suse.com/security/cve/CVE-2026-53359	external
https://bugzilla.suse.com/1270059	external
https://bugzilla.suse.com/1270060	external
https://bugzilla.suse.com/1271478	external
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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  "vulnerabilities": [
    {
      "cve": "CVE-2026-53359",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-53359"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86: Fix shadow paging use-after-free due to unexpected role\n\nCommit 0cb2af2ea66ad (\"KVM: x86: Fix shadow paging use-after-free due\nto unexpected GFN\") fixed a shadow paging mismatch between stored and\ncomputed GFNs; the bug could be triggered by changing a PDE mapping from\noutside the guest, and then deleting a memslot.  The rmap_remove()\ncall would miss entries created after the PDE change because the GFN\nof the leaf SPTE does not match the GFN of the struct kvm_mmu_page.\n\nA similar hole however remains if the modified PDE points to a non-leaf\npage.  In this case the gfn can be made to match, but the role does not\nmatch: the original large 2MB page creates a kvm_mmu_page with direct=1,\nwhile the new 4KB needs a kvm_mmu_page with direct=0.  However,\nkvm_mmu_get_child_sp() does not compare the role, and therefore reuses\nthe page.\n\nThe next step is installing a leaf (4KB) SPTE on the new path which\nrecords an rmap entry under the gfn resolved by the walk.  But when\nthat child is zapped its parent kvm_mmu_page has direct=1 and\nkvm_mmu_page_get_gfn() computes the gfn for the 4KB page as\nsp-\u003egfn + index instead of using sp-\u003eshadowed_translation[] (or sp-\u003egfns[]\nin older kernels).  It therefore fails to remove the recorded entry.\n\nWhen the memslot is dropped the shadow page is freed but the rmap\nentry survives, as in the scenario that was already fixed.  Code that\nlater walks that gfn (dirty logging, MMU notifier invalidation, and\nso on) dereferences an sptep that lies in the freed page, causing the\nuse-after-free.",
          "title": "CVE description"
        }
      ],
      "product_status": {
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          "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_115-default-3-150600.2.1.x86_64",
          "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_60-default-3-150700.2.1.ppc64le",
          "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_60-default-3-150700.2.1.s390x",
          "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_60-default-3-150700.2.1.x86_64"
        ]
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      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-53359",
          "url": "https://www.suse.com/security/cve/CVE-2026-53359"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1270059 for CVE-2026-53359",
          "url": "https://bugzilla.suse.com/1270059"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1270060 for CVE-2026-53359",
          "url": "https://bugzilla.suse.com/1270060"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1271478 for CVE-2026-53359",
          "url": "https://bugzilla.suse.com/1271478"
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      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
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            "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_115-default-3-150600.2.1.x86_64",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_60-default-3-150700.2.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_60-default-3-150700.2.1.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_60-default-3-150700.2.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
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            "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_115-default-3-150600.2.1.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_115-default-3-150600.2.1.x86_64",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_60-default-3-150700.2.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_60-default-3-150700.2.1.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_60-default-3-150700.2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-07-28T14:33:42Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-53359"
    },
    {
      "cve": "CVE-2026-53366",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-53366"
        }
      ],
      "notes": [
        {
          "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.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_115-default-3-150600.2.1.ppc64le",
          "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_115-default-3-150600.2.1.s390x",
          "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_115-default-3-150600.2.1.x86_64",
          "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_60-default-3-150700.2.1.ppc64le",
          "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_60-default-3-150700.2.1.s390x",
          "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_60-default-3-150700.2.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-53366",
          "url": "https://www.suse.com/security/cve/CVE-2026-53366"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1271366 for CVE-2026-53366",
          "url": "https://bugzilla.suse.com/1271366"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1271370 for CVE-2026-53366",
          "url": "https://bugzilla.suse.com/1271370"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_115-default-3-150600.2.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_115-default-3-150600.2.1.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_115-default-3-150600.2.1.x86_64",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_60-default-3-150700.2.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_60-default-3-150700.2.1.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_60-default-3-150700.2.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_115-default-3-150600.2.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_115-default-3-150600.2.1.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_115-default-3-150600.2.1.x86_64",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_60-default-3-150700.2.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_60-default-3-150700.2.1.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_60-default-3-150700.2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-07-28T14:33:42Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-53366"
    }
  ]
}

CVE-2026-53359 (GCVE-0-2026-53359)

Vulnerability from cvelistv5 – Published: 2026-07-04 11:51 – Updated: 2026-07-29 18:22

Title

KVM: x86: Fix shadow paging use-after-free due to unexpected role

Summary

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Fix shadow paging use-after-free due to unexpected role Commit 0cb2af2ea66ad ("KVM: x86: Fix shadow paging use-after-free due to unexpected GFN") fixed a shadow paging mismatch between stored and computed GFNs; the bug could be triggered by changing a PDE mapping from outside the guest, and then deleting a memslot. The rmap_remove() call would miss entries created after the PDE change because the GFN of the leaf SPTE does not match the GFN of the struct kvm_mmu_page. A similar hole however remains if the modified PDE points to a non-leaf page. In this case the gfn can be made to match, but the role does not match: the original large 2MB page creates a kvm_mmu_page with direct=1, while the new 4KB needs a kvm_mmu_page with direct=0. However, kvm_mmu_get_child_sp() does not compare the role, and therefore reuses the page. The next step is installing a leaf (4KB) SPTE on the new path which records an rmap entry under the gfn resolved by the walk. But when that child is zapped its parent kvm_mmu_page has direct=1 and kvm_mmu_page_get_gfn() computes the gfn for the 4KB page as sp->gfn + index instead of using sp->shadowed_translation[] (or sp->gfns[] in older kernels). It therefore fails to remove the recorded entry. When the memslot is dropped the shadow page is freed but the rmap entry survives, as in the scenario that was already fixed. Code that later walks that gfn (dirty logging, MMU notifier invalidation, and so on) dereferences an sptep that lies in the freed page, causing the use-after-free.

Severity

8.8 (High)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-416 - Use After Free

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/b1337aae5e194324e…
https://git.kernel.org/stable/c/9291654d69e08542d…
https://git.kernel.org/stable/c/2ad3afa40ac6aa340…
https://git.kernel.org/stable/c/5e470998a23e4c3d8…
https://git.kernel.org/stable/c/1ae7d5a6db6c190ce…
https://git.kernel.org/stable/c/81ccda30b4e83d8f5…
http://www.openwall.com/lists/oss-security/2026/07/06/7
https://github.com/V4bel/Januscape/blob/main/asse…	exploit

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 2032a93d66fa282ba0f2ea9152eeff9511fa9a96 , < b1337aae5e194324e4810d561764e7793f8b3864 (git) Affected: 2032a93d66fa282ba0f2ea9152eeff9511fa9a96 , < 9291654d69e08542de37755cebe4d5b02c3170d1 (git) Affected: 2032a93d66fa282ba0f2ea9152eeff9511fa9a96 , < 2ad3afa40ac6aa340dada122f9abfa46c0a6eb35 (git) Affected: 2032a93d66fa282ba0f2ea9152eeff9511fa9a96 , < 5e470998a23e4c3d89ed24e8172cb22747e61efa (git) Affected: 2032a93d66fa282ba0f2ea9152eeff9511fa9a96 , < 1ae7d5a6db6c190ce183e3098ca0e0846e14d462 (git) Affected: 2032a93d66fa282ba0f2ea9152eeff9511fa9a96 , < 81ccda30b4e83d8f5cc4fd50503c44e3a33abfeb (git)
Linux	Linux	Affected: 2.6.36 Unaffected: 0 , < 2.6.36 (semver) Unaffected: 6.1.177 , ≤ 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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  "containers": {
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        "providerMetadata": {
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            "url": "http://www.openwall.com/lists/oss-security/2026/07/06/7"
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                "id": "CVE-2026-53359",
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            {
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            {
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              "status": "unaffected",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86: Fix shadow paging use-after-free due to unexpected role\n\nCommit 0cb2af2ea66ad (\"KVM: x86: Fix shadow paging use-after-free due\nto unexpected GFN\") fixed a shadow paging mismatch between stored and\ncomputed GFNs; the bug could be triggered by changing a PDE mapping from\noutside the guest, and then deleting a memslot.  The rmap_remove()\ncall would miss entries created after the PDE change because the GFN\nof the leaf SPTE does not match the GFN of the struct kvm_mmu_page.\n\nA similar hole however remains if the modified PDE points to a non-leaf\npage.  In this case the gfn can be made to match, but the role does not\nmatch: the original large 2MB page creates a kvm_mmu_page with direct=1,\nwhile the new 4KB needs a kvm_mmu_page with direct=0.  However,\nkvm_mmu_get_child_sp() does not compare the role, and therefore reuses\nthe page.\n\nThe next step is installing a leaf (4KB) SPTE on the new path which\nrecords an rmap entry under the gfn resolved by the walk.  But when\nthat child is zapped its parent kvm_mmu_page has direct=1 and\nkvm_mmu_page_get_gfn() computes the gfn for the 4KB page as\nsp-\u003egfn + index instead of using sp-\u003eshadowed_translation[] (or sp-\u003egfns[]\nin older kernels).  It therefore fails to remove the recorded entry.\n\nWhen the memslot is dropped the shadow page is freed but the rmap\nentry survives, as in the scenario that was already fixed.  Code that\nlater walks that gfn (dirty logging, MMU notifier invalidation, and\nso on) dereferences an sptep that lies in the freed page, causing the\nuse-after-free."
        }
      ],
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            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
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          "url": "https://git.kernel.org/stable/c/b1337aae5e194324e4810d561764e7793f8b3864"
        },
        {
          "url": "https://git.kernel.org/stable/c/9291654d69e08542de37755cebe4d5b02c3170d1"
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        {
          "url": "https://git.kernel.org/stable/c/2ad3afa40ac6aa340dada122f9abfa46c0a6eb35"
        },
        {
          "url": "https://git.kernel.org/stable/c/5e470998a23e4c3d89ed24e8172cb22747e61efa"
        },
        {
          "url": "https://git.kernel.org/stable/c/1ae7d5a6db6c190ce183e3098ca0e0846e14d462"
        },
        {
          "url": "https://git.kernel.org/stable/c/81ccda30b4e83d8f5cc4fd50503c44e3a33abfeb"
        }
      ],
      "title": "KVM: x86: Fix shadow paging use-after-free due to unexpected role",
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  "cveMetadata": {
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    "datePublished": "2026-07-04T11:51:49.052Z",
    "dateReserved": "2026-06-09T07:44:35.400Z",
    "dateUpdated": "2026-07-29T18:22:55.066Z",
    "state": "PUBLISHED"
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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

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/ip_output.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5c6375bced6147ec2e460ee3b653f4860d5ecdc2",
              "status": "affected",
              "version": "8eb77cc73977d88787b37c92831b1c242e035396",
              "versionType": "git"
            },
            {
              "lessThan": "ce494707a9c07f27c219ca67f3e138061f53d9b3",
              "status": "affected",
              "version": "8eb77cc73977d88787b37c92831b1c242e035396",
              "versionType": "git"
            },
            {
              "lessThan": "a9c24eda24bd15f432e37824e6fc440977cb241c",
              "status": "affected",
              "version": "8eb77cc73977d88787b37c92831b1c242e035396",
              "versionType": "git"
            },
            {
              "lessThan": "77798d7be6ef71e72fb6fc8a2901bf74ebc9706f",
              "status": "affected",
              "version": "8eb77cc73977d88787b37c92831b1c242e035396",
              "versionType": "git"
            },
            {
              "lessThan": "c04d9ece23deb9e26c19f9ca215e98b3295aa1bb",
              "status": "affected",
              "version": "8eb77cc73977d88787b37c92831b1c242e035396",
              "versionType": "git"
            },
            {
              "lessThan": "eca856950f7cb1a221e02b99d758409f2c5cec42",
              "status": "affected",
              "version": "8eb77cc73977d88787b37c92831b1c242e035396",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/ip_output.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
            {
              "lessThan": "6.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.144",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.95",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.38",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.178",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.144",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.95",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.38",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.3",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2-rc1",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-24T14:33:54.829Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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-2026:3372-1

CVE-2026-53359 (GCVE-0-2026-53359)

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

Tags

Sightings

Nomenclature