{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-52998", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.377Z", "datePublished": "2026-06-24T16:29:10.874Z", "dateUpdated": "2026-06-24T16:29:10.874Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-24T16:29:10.874Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_osf: fix potential NULL dereference in ttl check\n\nThe nf_osf_ttl() function accessed skb->dev to perform a local interface\naddress lookup without verifying that the device pointer was valid.\n\nAdditionally, the implementation utilized an in_dev_for_each_ifa_rcu\nloop to match the packet source address against local interface\naddresses. It assumed that packets from the same subnet should not see a\ndecrement on the initial TTL. A packet might appear it is from the same\nsubnet but it actually isn't especially in modern environments with\ncontainers and virtual switching.\n\nRemove the device dereference and interface loop. Replace the logic with\na switch statement that evaluates the TTL according to the ttl_check."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/nfnetlink_osf.c"], "versions": [{"version": "11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384", "lessThan": "f4de0777e4554a7de19c920accde6319dd530782", "status": "affected", "versionType": "git"}, {"version": "11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384", "lessThan": "c996a90f3071cf43683e5423da31aadbe002b8b4", "status": "affected", "versionType": "git"}, {"version": "11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384", "lessThan": "edc806f9122961f0d3819f7c69c14cccde31f277", "status": "affected", "versionType": "git"}, {"version": "11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384", "lessThan": "5d05de2f0928d81309a815ecc76d1a3ad72cbc16", "status": "affected", "versionType": "git"}, {"version": "11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384", "lessThan": "95be653a76793856ff8b2d8bd82c2943c23f5ca8", "status": "affected", "versionType": "git"}, {"version": "11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384", "lessThan": "79b90a96688e521771fa6ed3dc7864b76b8df293", "status": "affected", "versionType": "git"}, {"version": "11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384", "lessThan": "83fc5dd63455a779ea2dd0f7ffee3c920919d80b", "status": "affected", "versionType": "git"}, {"version": "11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384", "lessThan": "711987ba281fd806322a7cd244e98e2a81903114", "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/netfilter/nfnetlink_osf.c"], "versions": [{"version": "2.6.31", "status": "affected"}, {"version": "0", "lessThan": "2.6.31", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.141", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.91", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.33", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.10", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "2.6.31", "versionEndExcluding": "5.10.258"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "5.15.209"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "6.6.141"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "6.12.91"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "6.18.33"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "7.0.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f4de0777e4554a7de19c920accde6319dd530782"}, {"url": "https://git.kernel.org/stable/c/c996a90f3071cf43683e5423da31aadbe002b8b4"}, {"url": "https://git.kernel.org/stable/c/edc806f9122961f0d3819f7c69c14cccde31f277"}, {"url": "https://git.kernel.org/stable/c/5d05de2f0928d81309a815ecc76d1a3ad72cbc16"}, {"url": "https://git.kernel.org/stable/c/95be653a76793856ff8b2d8bd82c2943c23f5ca8"}, {"url": "https://git.kernel.org/stable/c/79b90a96688e521771fa6ed3dc7864b76b8df293"}, {"url": "https://git.kernel.org/stable/c/83fc5dd63455a779ea2dd0f7ffee3c920919d80b"}, {"url": "https://git.kernel.org/stable/c/711987ba281fd806322a7cd244e98e2a81903114"}], "title": "netfilter: nfnetlink_osf: fix potential NULL dereference in ttl check", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384,f4de0777e4554a7de19c920accde6319dd530782)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384,c996a90f3071cf43683e5423da31aadbe002b8b4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384,edc806f9122961f0d3819f7c69c14cccde31f277)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384,5d05de2f0928d81309a815ecc76d1a3ad72cbc16)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384,95be653a76793856ff8b2d8bd82c2943c23f5ca8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384,79b90a96688e521771fa6ed3dc7864b76b8df293)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384,83fc5dd63455a779ea2dd0f7ffee3c920919d80b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384,711987ba281fd806322a7cd244e98e2a81903114)"}}], "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": "semver", "value": "2.6.31"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,2.6.31)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.258,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.209,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.175,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.141,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.91,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.33,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.10,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "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": "2026-06-24T19:45:05.749452+00:00", "updated": "2026-06-24T22:30:15.309218+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-476"]}