362 lines
17 KiB
JSON
362 lines
17 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-2026-31498",
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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": "2026-03-09T15:48:24.103Z",
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"datePublished": "2026-04-22T13:54:19.714Z",
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"dateUpdated": "2026-11-05T21:45:03.103Z"
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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": "2026-05-23T16:05:11.217Z"
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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\nBluetooth: L2CAP: Fix ERTM re-init and zero pdu_len infinite loop\n\nl2cap_config_req() processes CONFIG_REQ for channels in BT_CONNECTED\nstate to support L2CAP reconfiguration (e.g. MTU changes). However,\nsince both CONF_INPUT_DONE and CONF_OUTPUT_DONE are already set from\nthe initial configuration, the reconfiguration path falls through to\nl2cap_ertm_init(), which re-initializes tx_q, srej_q, srej_list, and\nretrans_list without freeing the previous allocations and sets\nchan->sdu to NULL without freeing the existing skb. This leaks all\npreviously allocated ERTM resources.\n\nAdditionally, l2cap_parse_conf_req() does not validate the minimum\nvalue of remote_mps derived from the RFC max_pdu_size option. A zero\nvalue propagates to l2cap_segment_sdu() where pdu_len becomes zero,\ncausing the while loop to never terminate since len is never\ndecremented, exhausting all available memory.\n\nFix the double-init by skipping l2cap_ertm_init() and\nl2cap_chan_ready() when the channel is already in BT_CONNECTED state,\nwhile still allowing the reconfiguration parameters to be updated\nthrough l2cap_parse_conf_req(). Also add a pdu_len zero check in\nl2cap_segment_sdu() as a safeguard."
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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/bluetooth/l2cap_core.c"
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],
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"versions": [
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{
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"version": "96298f640104e4cd9a913a6e50b0b981829b94ff",
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"lessThan": "9760b83cfd24b38caee663f429011a0dd6064fa9",
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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": "96298f640104e4cd9a913a6e50b0b981829b94ff",
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"lessThan": "de37e2655b7abc3f59254c6b72256840f39fc6d5",
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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": "96298f640104e4cd9a913a6e50b0b981829b94ff",
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"lessThan": "e7aab23b7df89a3d754a5f0a7d2237548b328bd0",
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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": "96298f640104e4cd9a913a6e50b0b981829b94ff",
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"lessThan": "52667c859fe33f70c2e711cb81bbd505d5eb8e75",
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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": "96298f640104e4cd9a913a6e50b0b981829b94ff",
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"lessThan": "9a21a631ee034b1573dce14b572a24943dbfd7ae",
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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": "96298f640104e4cd9a913a6e50b0b981829b94ff",
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"lessThan": "900e4db5385ec2cacd372345a80ab9c8e105b3a3",
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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": "96298f640104e4cd9a913a6e50b0b981829b94ff",
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"lessThan": "042e2cd4bb11e5313b19b87593616524949e4c52",
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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": "96298f640104e4cd9a913a6e50b0b981829b94ff",
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"lessThan": "25f420a0d4cfd61d3d23ec4b9c56d9f443d91377",
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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": "4ad03ff6f680681c5f78254e37c4c856fa953629",
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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": "b7d0ca715c1008acd2fc018f02a56fed88f78b75",
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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": "799263eb37a4f7f6d39334046929c3bc92452a7f",
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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": "8828622fb9b4201eeb0870587052e3d834cfaf61",
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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": "b432ea85ab8472763870dd0f2c186130dd36d68c",
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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": "4.4.238",
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"lessThan": "4.5",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "4.9.238",
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"lessThan": "4.10",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "4.14.200",
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"lessThan": "4.15",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "4.19.149",
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"lessThan": "4.20",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "5.4.69",
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"lessThan": "5.5",
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"status": "affected",
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"versionType": "semver"
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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/bluetooth/l2cap_core.c"
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],
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"versions": [
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{
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"version": "5.7",
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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": "5.7",
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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": "5.10.253",
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"lessThanOrEqual": "5.10.*",
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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": "5.15.203",
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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": "6.1.168",
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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": "6.6.131",
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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": "6.12.80",
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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": "6.18.21",
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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": "6.19.11",
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"lessThanOrEqual": "6.19.*",
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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": "7.0",
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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": "5.7",
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"versionEndExcluding": "5.10.253"
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},
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{
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"vulnerable": true,
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},
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.7",
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"versionEndExcluding": "6.19.11"
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},
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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},
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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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},
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{
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},
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{
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"vulnerable": true,
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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/9760b83cfd24b38caee663f429011a0dd6064fa9"
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},
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{
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"url": "https://git.kernel.org/stable/c/de37e2655b7abc3f59254c6b72256840f39fc6d5"
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},
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{
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"url": "https://git.kernel.org/stable/c/e7aab23b7df89a3d754a5f0a7d2237548b328bd0"
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},
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{
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"url": "https://git.kernel.org/stable/c/52667c859fe33f70c2e711cb81bbd505d5eb8e75"
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},
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{
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"url": "https://git.kernel.org/stable/c/9a21a631ee034b1573dce14b572a24943dbfd7ae"
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},
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{
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"url": "https://git.kernel.org/stable/c/900e4db5385ec2cacd372345a80ab9c8e105b3a3"
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},
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{
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"url": "https://git.kernel.org/stable/c/042e2cd4bb11e5313b19b87593616524949e4c52"
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},
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{
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"url": "https://git.kernel.org/stable/c/25f420a0d4cfd61d3d23ec4b9c56d9f443d91377"
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}
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],
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"title": "Bluetooth: L2CAP: Fix ERTM re-init and zero pdu_len infinite loop",
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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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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-31498",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-11-05T21:35:45.390526Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-11-05T21:45:03.103Z"
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}
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}
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]
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}
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} |