{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-48809", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-16T11:38:08.897Z", "datePublished": "2024-07-16T11:43:59.757Z", "dateUpdated": "2026-05-11T18:47:33.230Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T18:47:33.230Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix a memleak when uncloning an skb dst and its metadata\n\nWhen uncloning an skb dst and its associated metadata, a new\ndst+metadata is allocated and later replaces the old one in the skb.\nThis is helpful to have a non-shared dst+metadata attached to a specific\nskb.\n\nThe issue is the uncloned dst+metadata is initialized with a refcount of\n1, which is increased to 2 before attaching it to the skb. When\ntun_dst_unclone returns, the dst+metadata is only referenced from a\nsingle place (the skb) while its refcount is 2. Its refcount will never\ndrop to 0 (when the skb is consumed), leading to a memory leak.\n\nFix this by removing the call to dst_hold in tun_dst_unclone, as the\ndst+metadata refcount is already 1." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/net/dst_metadata.h" ], "versions": [ { "version": "fc4099f17240767554ff3a73977acb78ef615404", "lessThan": "4ac84498fbe84a00e7aef185e2bb3e40ce71eca4", "status": "affected", "versionType": "git" }, { "version": "fc4099f17240767554ff3a73977acb78ef615404", "lessThan": "c1ff27d100e2670b03cbfddb9117e5f9fc672540", "status": "affected", "versionType": "git" }, { "version": "fc4099f17240767554ff3a73977acb78ef615404", "lessThan": "0be943916d781df2b652793bb2d3ae4f9624c10a", "status": "affected", "versionType": "git" }, { "version": "fc4099f17240767554ff3a73977acb78ef615404", "lessThan": "a80817adc2a4c1ba26a7aa5f3ed886e4a18dff88", "status": "affected", "versionType": "git" }, { "version": "fc4099f17240767554ff3a73977acb78ef615404", "lessThan": "00e6d6c3bc14dfe32824e2c515f0e0f2d6ecf2f1", "status": "affected", "versionType": "git" }, { "version": "fc4099f17240767554ff3a73977acb78ef615404", "lessThan": "fdcb263fa5cda15b8cb24a641fa2718c47605314", "status": "affected", "versionType": "git" }, { "version": "fc4099f17240767554ff3a73977acb78ef615404", "lessThan": "8b1087b998e273f07be13dcb5f3ca4c309c7f108", "status": "affected", "versionType": "git" }, { "version": "fc4099f17240767554ff3a73977acb78ef615404", "lessThan": "9eeabdf17fa0ab75381045c867c370f4cc75a613", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/net/dst_metadata.h" ], "versions": [ { "version": "4.3", "status": "affected" }, { "version": "0", "lessThan": "4.3", "status": "unaffected", "versionType": "semver" }, { "version": "4.9.302", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.267", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.230", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.180", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.101", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.24", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.16.10", "lessThanOrEqual": "5.16.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.17", "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": "4.3", "versionEndExcluding": "4.9.302" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "4.14.267" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "4.19.230" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "5.4.180" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "5.10.101" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "5.15.24" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "5.16.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "5.17" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/4ac84498fbe84a00e7aef185e2bb3e40ce71eca4" }, { "url": "https://git.kernel.org/stable/c/c1ff27d100e2670b03cbfddb9117e5f9fc672540" }, { "url": "https://git.kernel.org/stable/c/0be943916d781df2b652793bb2d3ae4f9624c10a" }, { "url": "https://git.kernel.org/stable/c/a80817adc2a4c1ba26a7aa5f3ed886e4a18dff88" }, { "url": "https://git.kernel.org/stable/c/00e6d6c3bc14dfe32824e2c515f0e0f2d6ecf2f1" }, { "url": "https://git.kernel.org/stable/c/fdcb263fa5cda15b8cb24a641fa2718c47605314" }, { "url": "https://git.kernel.org/stable/c/8b1087b998e273f07be13dcb5f3ca4c309c7f108" }, { "url": "https://git.kernel.org/stable/c/9eeabdf17fa0ab75381045c867c370f4cc75a613" } ], "title": "net: fix a memleak when uncloning an skb dst and 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