310 lines
16 KiB
JSON
310 lines
16 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-2026-68236",
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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": "2026-07-30T09:28:09.376Z",
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"datePublished": "2026-08-10T12:01:01.114Z",
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"dateUpdated": "2026-10-19T20:58:57.661Z"
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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": "2026-10-03T10:55:40.750Z"
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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\ndrm/amd/display: set new_stream to NULL after release\n\nIn dm_update_crtc_state(), the skip_modeset path releases new_stream\nvia dc_stream_release() but does not set the pointer to NULL.\n\nIf a later error (e.g., color management failure) triggers the fail\nlabel, the error path calls dc_stream_release() again on the same\ndangling pointer, causing a double release and potential use-after-free.\n\nFix this by setting new_stream to NULL after the initial release.\n\n(cherry picked from commit 99f3af19073b3ddbfd96e789124cce12c4277b28)"
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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 - The bug is reached through the DRM atomic modeset ioctl (DRM_IOCTL_MODE_ATOMIC) on a local /dev/dri/card* node of an AMD GPU; there is no network or remote input path into dm_update_crtc_state().\nAC:L - A single atomic commit that requests a mode change while attaching a wrong-sized DEGAMMA_LUT blob deterministically drives amdgpu_dm_check_crtc_color_mgmt() to -EINVAL and hits the double dc_stream_release(); no race and no uncontrolled precondition, and TEST_ONLY commits let the attacker repeat it freely to groom the heap.\nPR:L - The atomic ioctl is gated only by DRM master on the card node, which any unprivileged local user on a graphical seat or an unused VT can hold; no CAP_SYS_ADMIN or root is needed.\nUI:N - The attacker performs the whole sequence with its own ioctl calls; no action by another user or administrator is required, and TEST_ONLY commits do not even disturb the display.\nS:U - The corrupted dc_stream_state and the resulting freed-memory reuse stay within the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The extra kref_put() frees the dc_stream_state while the CRTC state and the DC context still reference it; reading through those dangling pointers after the slab is reallocated leaks adjacent kernel object contents and pointers, and the attacker can spray to control what lands there.\nI:H - The reference-count underflow yields a use-after-free/double-free: subsequent kref_put() writes into reallocated slab memory and dc_stream_free() kfree()s an attacker-influenced update_scratch pointer, giving write and arbitrary-free primitives usable for privilege escalation.\nA:H - Even without exploitation the premature free causes dereference of freed stream/sink/link structures during atomic state unwind, producing a kernel oops or panic and killing the display pipeline; it can be triggered repeatedly."
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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/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c"
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],
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"versions": [
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{
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"version": "9b690ef3c70422cdcd0cf912db33f2c92ef4a53f",
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"lessThan": "92b7c6e3a1546c6db868b07e93fa6fb950d1d3a0",
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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": "9b690ef3c70422cdcd0cf912db33f2c92ef4a53f",
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"lessThan": "bf9c06c70f496f1ba4474caf95c69696c828340e",
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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": "9b690ef3c70422cdcd0cf912db33f2c92ef4a53f",
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"lessThan": "01ba5b36898d6258f584269537cc49e7b05cf7c6",
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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": "9b690ef3c70422cdcd0cf912db33f2c92ef4a53f",
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"lessThan": "ba8bf1dcbb44773e7a0fd13b42925c644e0d5e76",
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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": "9b690ef3c70422cdcd0cf912db33f2c92ef4a53f",
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"lessThan": "5182e442e61397d446c36995b8f5676942d35b82",
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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": "9b690ef3c70422cdcd0cf912db33f2c92ef4a53f",
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"lessThan": "679f23f0a3606afcef1ffabd72222f00a54ad9e3",
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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": "9b690ef3c70422cdcd0cf912db33f2c92ef4a53f",
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"lessThan": "0676fecbb5242aa22c057e78326d6d6041db034c",
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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": "9b690ef3c70422cdcd0cf912db33f2c92ef4a53f",
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"lessThan": "9fa26b9eed6195bf840f39ac183b9a6237548755",
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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/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c"
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],
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"versions": [
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{
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"version": "4.15",
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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": "4.15",
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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": "5.10.271",
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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": "5.15.222",
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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": "6.1.189",
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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": "6.6.148",
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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": "6.12.101",
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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": "6.18.42",
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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": "7.1.6",
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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": "4.15",
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"versionEndExcluding": "5.10.271"
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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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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/92b7c6e3a1546c6db868b07e93fa6fb950d1d3a0"
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},
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{
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"url": "https://git.kernel.org/stable/c/bf9c06c70f496f1ba4474caf95c69696c828340e"
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},
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{
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"url": "https://git.kernel.org/stable/c/01ba5b36898d6258f584269537cc49e7b05cf7c6"
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},
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{
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"url": "https://git.kernel.org/stable/c/ba8bf1dcbb44773e7a0fd13b42925c644e0d5e76"
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},
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{
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"url": "https://git.kernel.org/stable/c/5182e442e61397d446c36995b8f5676942d35b82"
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},
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{
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"url": "https://git.kernel.org/stable/c/679f23f0a3606afcef1ffabd72222f00a54ad9e3"
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},
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{
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"url": "https://git.kernel.org/stable/c/0676fecbb5242aa22c057e78326d6d6041db034c"
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},
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{
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"url": "https://git.kernel.org/stable/c/9fa26b9eed6195bf840f39ac183b9a6237548755"
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}
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],
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"title": "drm/amd/display: set new_stream to NULL after release",
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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-2026-68236",
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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": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T15:46:01.329903Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-415",
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"description": "CWE-415 Double Free"
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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": "2026-10-19T20:58:57.661Z"
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}
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}
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]
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}
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} |