227 lines
11 KiB
JSON
227 lines
11 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-74659",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-08-15T05:44:03.924Z",
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"datePublished": "2026-08-22T15:32:32.926Z",
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"dateUpdated": "2026-08-22T15:32:32.926Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-22T15:32:32.926Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bridge: mrp: fix uninitialised bytes on the wire\n\nbr_mrp_alloc_test_skb() builds MRP test frames on an skb from\ndev_alloc_skb(), which does not clear the linear data area. On the MRA\nring-role branch the sub-option TLV header is appended with\n\n\tsub_tlv = skb_put(skb, sizeof(*sub_tlv));\n\tsub_tlv->type = BR_MRP_SUB_TLV_HEADER_TEST_AUTO_MGR;\n\nso sub_tlv->length is never written, and the two trailing alignment bytes\nare appended with a bare skb_put() that does not clear them either. The\nneighbouring oui and sub_opt regions are explicitly zeroed, so three\nuninitialised bytes are left in every MRA MRP_Test frame that goes out.\n\nPut the sub-option TLV header and the alignment padding in a single\nskb_put_zero(), which clears both. The AUTO_MGR sub-TLV carries no\npayload, so the zeroed length field is already the value it should have."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/bridge/br_mrp.c"
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],
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"versions": [
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{
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"version": "f7458934b0791c39a001e4d902fc3bf697b439b5",
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"lessThan": "014c062d23c63ec77ef2cf17a0d9363c7441cc94",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "f7458934b0791c39a001e4d902fc3bf697b439b5",
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"lessThan": "7ebc23ff03668042e0b0e4034bb1518d36198d9e",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "f7458934b0791c39a001e4d902fc3bf697b439b5",
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"lessThan": "06d58b8d2f053ced82e01efaeb6e7c82891eed58",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "f7458934b0791c39a001e4d902fc3bf697b439b5",
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"lessThan": "a5e385eeb2d6dbbbdebfa050e67c34734ae12693",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "f7458934b0791c39a001e4d902fc3bf697b439b5",
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"lessThan": "5912cf1822fbe53ae275c147868740eb384a5d3e",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "f7458934b0791c39a001e4d902fc3bf697b439b5",
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"lessThan": "e08665218040f8e312abe40f74543186f3c2c941",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "f7458934b0791c39a001e4d902fc3bf697b439b5",
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"lessThan": "63488dba65ef91373ef616575b32eb0eb21459f4",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/bridge/br_mrp.c"
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],
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"versions": [
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{
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"version": "5.14",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.14",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.216",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.183",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.152",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.104",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.45",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.9",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.14",
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"versionEndExcluding": "5.15.216"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.14",
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"versionEndExcluding": "6.1.183"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.14",
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"versionEndExcluding": "6.6.152"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.14",
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"versionEndExcluding": "6.12.104"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.14",
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"versionEndExcluding": "6.18.45"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.14",
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"versionEndExcluding": "7.1.9"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.14",
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"versionEndExcluding": "7.2"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/014c062d23c63ec77ef2cf17a0d9363c7441cc94"
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},
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{
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"url": "https://git.kernel.org/stable/c/7ebc23ff03668042e0b0e4034bb1518d36198d9e"
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},
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{
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"url": "https://git.kernel.org/stable/c/06d58b8d2f053ced82e01efaeb6e7c82891eed58"
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},
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{
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"url": "https://git.kernel.org/stable/c/a5e385eeb2d6dbbbdebfa050e67c34734ae12693"
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},
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{
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"url": "https://git.kernel.org/stable/c/5912cf1822fbe53ae275c147868740eb384a5d3e"
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},
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{
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"url": "https://git.kernel.org/stable/c/e08665218040f8e312abe40f74543186f3c2c941"
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},
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{
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"url": "https://git.kernel.org/stable/c/63488dba65ef91373ef616575b32eb0eb21459f4"
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}
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],
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"title": "net: bridge: mrp: fix uninitialised bytes on the wire",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |