227 lines
12 KiB
JSON
227 lines
12 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-2026-80841",
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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": "2026-08-26T14:34:25.796Z",
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"datePublished": "2026-09-04T15:54:51.459Z",
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"dateUpdated": "2026-10-30T12:31:11.820Z"
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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": "2026-10-30T12:31:11.820Z"
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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/packet: defer vmalloc TX_RING free until skbs finish\n\nAF_PACKET TX_RING skbs keep a raw pointer to their ring frame. The skb\npage references preserve page-backed ring blocks after pg_vec is freed,\nbut they do not preserve a vmalloc mapping.\n\ntpacket_destruct_skb() currently drops the pending reference before\nwriting the timestamp and TP_STATUS_AVAILABLE to the frame. Move the\ndecrement after those stores. The smp_wmb() in __packet_set_status()\norders the frame stores before the decrement.\n\nAlso recheck pending TX frames under pg_vec_lock before non-closing\nring replacement, so a racing send cannot add a pending skb between\nthe initial check and the ring swap.\n\nRing allocation can produce a mixture of page-backed and vmalloc-backed\nblocks. Allocate deferred-work storage during TX ring setup when the\nfirst vmalloc-backed block is encountered, and keep its pointer in the\npg_vec allocation header. If allocation fails, return -ENOMEM from ring\nsetup. On socket close, a non-NULL pointer identifies a vmalloc-backed\nvector without a scan. If TX skbs remain, defer the whole vector to\nsystem_long_wq.\n\nAfter pg_vec is detached, a late destructor can skip the pending\ndecrement. Use socket write-memory accounting as the deferred lifetime\ngate instead: an skb remains charged through its final sock_wfree(),\nafter all ring-frame accesses. The delayed work retains a socket\nreference and reschedules itself until no TX skbs remain.\n\nMove pending_refcnt release to packet_sock_destruct() so late skb\ndestructors and deferred cleanup can safely use it after\npacket_release(). Page-backed teardown remains synchronous, and no lock\nis added to the TX completion hot path."
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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/packet/af_packet.c"
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],
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"versions": [
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{
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"version": "b013840810c221f2b0cf641d01531526052dc1fb",
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"lessThan": "ed126ca71d4d949ad99f40b974a8f7685e808f8b",
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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": "b013840810c221f2b0cf641d01531526052dc1fb",
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"lessThan": "debf9f50140b3df3949ebcb97d4450f8993fe32d",
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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": "b013840810c221f2b0cf641d01531526052dc1fb",
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"lessThan": "4ce6e2d2e38055b2012bd5fdb0c8a8183c8a1b0c",
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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": "b013840810c221f2b0cf641d01531526052dc1fb",
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"lessThan": "ed25ed29034ddc3dbe451ccbaa58ab9932f99d8b",
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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": "b013840810c221f2b0cf641d01531526052dc1fb",
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"lessThan": "0189dce07db2dc059ae0570e06758ec4233c6e11",
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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": "b013840810c221f2b0cf641d01531526052dc1fb",
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"lessThan": "550d00aa58193fb649a09a9c9e338c685adad784",
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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": "b013840810c221f2b0cf641d01531526052dc1fb",
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"lessThan": "992cc9f94ca924089a506ba9b327caa9af797529",
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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/packet/af_packet.c"
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],
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"versions": [
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{
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"version": "3.14",
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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": "3.14",
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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": "6.1.191",
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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": "6.6.158",
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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": "6.12.111",
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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": "6.18.51",
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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": "7.1.13",
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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": "7.2.3",
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"lessThanOrEqual": "7.2.*",
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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": "7.3",
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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": "3.14",
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"versionEndExcluding": "6.1.191"
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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": "3.14",
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"versionEndExcluding": "6.6.158"
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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": "3.14",
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"versionEndExcluding": "6.12.111"
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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": "3.14",
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"versionEndExcluding": "6.18.51"
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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": "3.14",
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"versionEndExcluding": "7.1.13"
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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": "3.14",
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"versionEndExcluding": "7.2.3"
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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": "3.14",
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"versionEndExcluding": "7.3"
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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/ed126ca71d4d949ad99f40b974a8f7685e808f8b"
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},
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{
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"url": "https://git.kernel.org/stable/c/debf9f50140b3df3949ebcb97d4450f8993fe32d"
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},
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{
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"url": "https://git.kernel.org/stable/c/4ce6e2d2e38055b2012bd5fdb0c8a8183c8a1b0c"
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},
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{
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"url": "https://git.kernel.org/stable/c/ed25ed29034ddc3dbe451ccbaa58ab9932f99d8b"
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},
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{
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"url": "https://git.kernel.org/stable/c/0189dce07db2dc059ae0570e06758ec4233c6e11"
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},
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{
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"url": "https://git.kernel.org/stable/c/550d00aa58193fb649a09a9c9e338c685adad784"
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},
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{
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"url": "https://git.kernel.org/stable/c/992cc9f94ca924089a506ba9b327caa9af797529"
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}
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],
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"title": "net/packet: defer vmalloc TX_RING free until skbs finish",
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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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} |