222 lines
12 KiB
JSON
222 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-2026-53401",
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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": "2026-06-09T07:44:35.403Z",
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"datePublished": "2026-07-19T12:02:01.209Z",
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"dateUpdated": "2026-10-30T12:27:07.510Z"
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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": "2026-10-30T12:27:07.510Z"
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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\nfbdev: omap2: fix use-after-free in omapfb_mmap\n\nomapfb_mmap() has a race condition with OMAPFB_SETUP_PLANE ioctl that\ncan lead to use-after-free:\n\nThe fb_mmap() entry point holds mm_lock but not lock (fb_info->lock),\nwhile ioctl handlers like OMAPFB_SETUP_PLANE hold lock but not mm_lock.\nThis allows concurrent execution.\n\nIn omapfb_mmap():\n1. rg = omapfb_get_mem_region(ofbi->region); // Get old region ref\n2. start = omapfb_get_region_paddr(ofbi); // Read from NEW region\n3. len = fix->smem_len; // Read from NEW region\n4. vm_iomap_memory(vma, start, len); // Map NEW region memory\n5. atomic_inc(&rg->map_count); // Increment OLD region!\n\nConcurrently, OMAPFB_SETUP_PLANE can:\n- Reassign ofbi->region = new_rg\n- Update fix->smem_len\n- OMAPFB_SETUP_MEM then checks NEW region's map_count (0!) and frees it\n\nThis leaves userspace with a mapping to freed physical memory.\n\nThe fix is to read all required values (start, len) from the same\nregion reference (rg) that will have its map_count incremented,\npreventing the region from being freed while still mapped."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - Exploitation requires local syscalls (mmap and OMAPFB ioctls) against /dev/fb*; there is no network, adjacent-wireless, or physical-device insertion path to this driver code.\nAC:L - The attacker fully controls both sides of the race by opening /dev/fb and running concurrent mmap and OMAPFB_SETUP_PLANE/OMAPFB_SETUP_MEM ioctl threads, with no conditions outside attacker influence required for success.\nPR:L - Exploitation requires only the ability to open the framebuffer character device and issue its ioctls, which on OMAP embedded/kiosk deployments is typically granted to a local application user (video group or equivalent), not real root.\nUI:N - No victim interaction is required; the attacker triggers the race entirely through their own threads operating on a framebuffer device they can already open.\nS:U - Impact is confined to escalating within the same OS security boundary (userspace gaining read/write access to freed kernel/DMA physical memory), not a VM escape or cross-guest boundary crossing.\nC:H - The use-after-free leaves userspace mapped to freed physical pages that can be reallocated with sensitive kernel or DMA data, enabling arbitrary memory disclosure.\nI:H - The stale userspace mapping provides writable access to freed physical memory, enabling corruption of subsequently allocated kernel or DMA buffers and potential control-flow hijacking.\nA:H - Use-after-free of DMA framebuffer memory can cause kernel oopses or panics when freed pages are reused, and the UAF itself constitutes a high availability impact even before full exploitation."
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}
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]
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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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"drivers/video/fbdev/omap2/omapfb/omapfb-main.c"
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],
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"versions": [
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{
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"version": "078ff546a806b2c2ab74c25c8edd4c6d4680656a",
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"lessThan": "a1a00f664a409b3412f9e1408c12890cffe50362",
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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": "078ff546a806b2c2ab74c25c8edd4c6d4680656a",
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"lessThan": "5e10b1747547c3815e90d28166e92144835e065f",
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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": "078ff546a806b2c2ab74c25c8edd4c6d4680656a",
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"lessThan": "986d5fafb73b8b866651399934b66d690f49135a",
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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": "078ff546a806b2c2ab74c25c8edd4c6d4680656a",
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"lessThan": "8363c219d88e78daaee5665117a0380442989338",
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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": "078ff546a806b2c2ab74c25c8edd4c6d4680656a",
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"lessThan": "6eb6ebcc8590007ad59ddccc8b5f9201655b33f8",
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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": "078ff546a806b2c2ab74c25c8edd4c6d4680656a",
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"lessThan": "7958e67375aa111522086286bba13cfc0816ce8d",
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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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"drivers/video/fbdev/omap2/omapfb/omapfb-main.c"
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],
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"versions": [
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{
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"version": "2.6.36",
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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": "2.6.36",
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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": "6.6.160",
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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": "6.12.114",
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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": "6.18.57",
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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": "7.1.3",
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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": "2.6.36",
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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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"versionEndExcluding": "6.6.160"
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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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"references": [
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{
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"url": "https://git.kernel.org/stable/c/a1a00f664a409b3412f9e1408c12890cffe50362"
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},
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{
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"url": "https://git.kernel.org/stable/c/5e10b1747547c3815e90d28166e92144835e065f"
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},
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{
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"url": "https://git.kernel.org/stable/c/986d5fafb73b8b866651399934b66d690f49135a"
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},
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{
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"url": "https://git.kernel.org/stable/c/8363c219d88e78daaee5665117a0380442989338"
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},
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{
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"url": "https://git.kernel.org/stable/c/6eb6ebcc8590007ad59ddccc8b5f9201655b33f8"
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},
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{
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"url": "https://git.kernel.org/stable/c/7958e67375aa111522086286bba13cfc0816ce8d"
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}
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],
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"title": "fbdev: omap2: fix use-after-free in omapfb_mmap",
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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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} |