{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-45886", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.082Z", "datePublished": "2026-05-27T12:16:58.000Z", "dateUpdated": "2026-05-27T12:16:58.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-27T12:16:58.000Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix bpf_xdp_store_bytes proto for read-only arg\n\nWhile making some maps in Cilium read-only from the BPF side, we noticed\nthat the bpf_xdp_store_bytes proto is incorrect. In particular, the\nverifier was throwing the following error:\n\n ; ret = ctx_store_bytes(ctx, l3_off + offsetof(struct iphdr, saddr),\n &nat->address, 4, 0);\n 635: (79) r1 = *(u64 *)(r10 -144) ; R1=ctx() R10=fp0 fp-144=ctx()\n 636: (b4) w2 = 26 ; R2=26\n 637: (b4) w4 = 4 ; R4=4\n 638: (b4) w5 = 0 ; R5=0\n 639: (85) call bpf_xdp_store_bytes#190\n write into map forbidden, value_size=6 off=0 size=4\n\nnat comes from a BPF_F_RDONLY_PROG map, so R3 is a PTR_TO_MAP_VALUE.\nThe verifier checks the helper's memory access to R3 in\ncheck_mem_size_reg, as it reaches ARG_CONST_SIZE argument. The third\nargument has expected type ARG_PTR_TO_UNINIT_MEM, which includes the\nMEM_WRITE flag. The verifier thus checks for a BPF_WRITE access on R3.\nGiven R3 points to a read-only map, the check fails.\n\nConversely, ARG_PTR_TO_UNINIT_MEM can also lead to the helper reading\nfrom uninitialized memory.\n\nThis patch simply fixes the expected argument type to match that of\nbpf_skb_store_bytes."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/core/filter.c"], "versions": [{"version": "3f364222d032eea6b245780e845ad213dab28cdd", "lessThan": "ffb5d1c5e3933b947fc7303ad68bf0c536d0c85e", "status": "affected", "versionType": "git"}, {"version": "3f364222d032eea6b245780e845ad213dab28cdd", "lessThan": "ddc34a1b85505c919026ddc82fafdada9a160b15", "status": "affected", "versionType": "git"}, {"version": "3f364222d032eea6b245780e845ad213dab28cdd", "lessThan": "0db169a91381a473b7974021d1c02f8da72c5775", "status": "affected", "versionType": "git"}, {"version": "3f364222d032eea6b245780e845ad213dab28cdd", "lessThan": "d7b87adeb0eb539b9b824b101bb14fb01e41240b", "status": "affected", "versionType": "git"}, {"version": "3f364222d032eea6b245780e845ad213dab28cdd", "lessThan": "57f7f6a0ad04a65c8a7a067b2f56cbbf2aec9e52", "status": "affected", "versionType": "git"}, {"version": "3f364222d032eea6b245780e845ad213dab28cdd", "lessThan": "6557f1565d779851c4db9c488c49c05a47a6e72f", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/core/filter.c"], "versions": [{"version": "5.18", "status": "affected"}, {"version": "0", "lessThan": "5.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.165", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.128", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.75", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.14", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.4", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.1.165"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.6.128"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.12.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.18.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.19.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ffb5d1c5e3933b947fc7303ad68bf0c536d0c85e"}, {"url": "https://git.kernel.org/stable/c/ddc34a1b85505c919026ddc82fafdada9a160b15"}, {"url": "https://git.kernel.org/stable/c/0db169a91381a473b7974021d1c02f8da72c5775"}, {"url": "https://git.kernel.org/stable/c/d7b87adeb0eb539b9b824b101bb14fb01e41240b"}, {"url": "https://git.kernel.org/stable/c/57f7f6a0ad04a65c8a7a067b2f56cbbf2aec9e52"}, {"url": "https://git.kernel.org/stable/c/6557f1565d779851c4db9c488c49c05a47a6e72f"}], "title": "bpf: Fix bpf_xdp_store_bytes proto for read-only arg", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/core/filter.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ffb5d1c5e3933b947fc7303ad68bf0c536d0c85e", "status": "affected", "version": "3f364222d032eea6b245780e845ad213dab28cdd", "versionType": "git"}, {"lessThan": "ddc34a1b85505c919026ddc82fafdada9a160b15", "status": "affected", "version": "3f364222d032eea6b245780e845ad213dab28cdd", "versionType": "git"}, {"lessThan": "0db169a91381a473b7974021d1c02f8da72c5775", "status": "affected", "version": "3f364222d032eea6b245780e845ad213dab28cdd", "versionType": "git"}, {"lessThan": "d7b87adeb0eb539b9b824b101bb14fb01e41240b", "status": "affected", "version": "3f364222d032eea6b245780e845ad213dab28cdd", "versionType": "git"}, {"lessThan": "57f7f6a0ad04a65c8a7a067b2f56cbbf2aec9e52", "status": "affected", "version": "3f364222d032eea6b245780e845ad213dab28cdd", "versionType": "git"}, {"lessThan": "6557f1565d779851c4db9c488c49c05a47a6e72f", "status": "affected", "version": "3f364222d032eea6b245780e845ad213dab28cdd", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/core/filter.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.18"}, {"lessThan": "5.18", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.165", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.128", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.75", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.14", "versionType": "semver"}, {"lessThanOrEqual": "6.19.*", "status": "unaffected", "version": "6.19.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix bpf_xdp_store_bytes proto for read-only arg\n\nWhile making some maps in Cilium read-only from the BPF side, we noticed\nthat the bpf_xdp_store_bytes proto is incorrect. In particular, the\nverifier was throwing the following error:\n\n ; ret = ctx_store_bytes(ctx, l3_off + offsetof(struct iphdr, saddr),\n &nat->address, 4, 0);\n 635: (79) r1 = *(u64 *)(r10 -144) ; R1=ctx() R10=fp0 fp-144=ctx()\n 636: (b4) w2 = 26 ; R2=26\n 637: (b4) w4 = 4 ; R4=4\n 638: (b4) w5 = 0 ; R5=0\n 639: (85) call bpf_xdp_store_bytes#190\n write into map forbidden, value_size=6 off=0 size=4\n\nnat comes from a BPF_F_RDONLY_PROG map, so R3 is a PTR_TO_MAP_VALUE.\nThe verifier checks the helper's memory access to R3 in\ncheck_mem_size_reg, as it reaches ARG_CONST_SIZE argument. The third\nargument has expected type ARG_PTR_TO_UNINIT_MEM, which includes the\nMEM_WRITE flag. The verifier thus checks for a BPF_WRITE access on R3.\nGiven R3 points to a read-only map, the check fails.\n\nConversely, ARG_PTR_TO_UNINIT_MEM can also lead to the helper reading\nfrom uninitialized memory.\n\nThis patch simply fixes the expected argument type to match that of\nbpf_skb_store_bytes."}], "id": "CVE-2026-45886", "lastModified": "2026-06-17T10:52:40.410", "metrics": {}, "published": "2026-05-27T14:17:02.567", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0db169a91381a473b7974021d1c02f8da72c5775"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/57f7f6a0ad04a65c8a7a067b2f56cbbf2aec9e52"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6557f1565d779851c4db9c488c49c05a47a6e72f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d7b87adeb0eb539b9b824b101bb14fb01e41240b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ddc34a1b85505c919026ddc82fafdada9a160b15"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ffb5d1c5e3933b947fc7303ad68bf0c536d0c85e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: bpf: Fix bpf_xdp_store_bytes proto for read-only arg", "id": "2481904", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2481904"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2026-45886", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-45886\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-45886\nhttps://lore.kernel.org/linux-cve-announce/2026052716-CVE-2026-45886-60e4@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3f364222d032eea6b245780e845ad213dab28cdd,ffb5d1c5e3933b947fc7303ad68bf0c536d0c85e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3f364222d032eea6b245780e845ad213dab28cdd,ddc34a1b85505c919026ddc82fafdada9a160b15)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3f364222d032eea6b245780e845ad213dab28cdd,0db169a91381a473b7974021d1c02f8da72c5775)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3f364222d032eea6b245780e845ad213dab28cdd,d7b87adeb0eb539b9b824b101bb14fb01e41240b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3f364222d032eea6b245780e845ad213dab28cdd,57f7f6a0ad04a65c8a7a067b2f56cbbf2aec9e52)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3f364222d032eea6b245780e845ad213dab28cdd,6557f1565d779851c4db9c488c49c05a47a6e72f)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.18"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.18)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.165,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.128,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.75,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.14,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.4,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-27T16:45:38.117344+00:00", "updated": "2026-05-28T17:15:21.847204+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-20"]}