159 lines
8.4 KiB
JSON
159 lines
8.4 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-2026-80741",
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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": "2026-08-26T14:34:25.790Z",
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"datePublished": "2026-09-03T08:26:25.322Z",
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"dateUpdated": "2026-09-04T04:58:24.919Z"
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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": "2026-09-04T04:58:24.919Z"
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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/log: Fix out-of-bounds read on empty message length\n\ndrm_log_draw_kmsg_record() accesses s[len - 1] to strip the trailing\nnewline, but len is unsigned int. If len is 0, the subtraction wraps\nto UINT_MAX, causing an out-of-bounds read.\n\nAdd an early return when len is 0."
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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:N/A:H",
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"baseScore": 7.1,
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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 in drm_log, an in-kernel DRM boot console that renders printk records to the framebuffer; it is only reached from the local printk/nbcon console path, not from any network protocol or physical bus.\nAC:L - Once CONFIG_DRM_CLIENT_LOG is active (common on embedded/kiosk displays), a local actor can drive printk/console output; if a zero-length record is delivered to drm_log_draw_kmsg_record(), the unsigned wrap to UINT_MAX makes the OOB read deterministic rather than race-dependent.\nPR:L - No root or DRM master is required to reach the console printk path; unprivileged local processes routinely trigger kernel logging via syscalls and /dev/kmsg (CAP_SYSLOG is obtainable in user namespaces), and drm_log only refuses to draw when a userspace DRM master is already held.\nUI:N - Exploitation does not require any victim to click, mount, or open a file; it is triggered automatically when the kernel console layer emits a qualifying (including zero-length) message to the drm_log nbcon handler.\nS:U - Impact stays within kernel context on the same machine (display logger crash/OOB read); it does not cross a VM, container, or IOMMU security boundary.\nC:H - With len=0, s[len-1] indexes s[UINT_MAX-1], an unbounded out-of-bounds kernel read; per kernel CVSS guidance, OOB reads are rated High even when the immediate fault dominates.\nI:N - The defect is a read-side integer underflow only; it does not corrupt or write adjacent memory and provides no direct arbitrary-write or code-execution primitive.\nA:H - Reading at offset UINT_MAX from the printk outbuf is virtually certain to fault the console thread with a kernel oops/panic, denying display and potentially halting the system on embedded drm_log deployments."
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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/clients/drm_log.c"
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],
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"versions": [
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{
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"version": "25e2c2a3eff55683bbe77b108db2a7e389246666",
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"lessThan": "16a2716910ecf7d31bf3c033ee7c506a0b00b2ee",
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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": "25e2c2a3eff55683bbe77b108db2a7e389246666",
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"lessThan": "16bcea56f4205314ec2aa04a7ec74e5261d253c7",
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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": "25e2c2a3eff55683bbe77b108db2a7e389246666",
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"lessThan": "60baa179ed1333535f6e2da4133511db55278ee4",
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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/clients/drm_log.c"
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],
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"versions": [
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{
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"version": "6.14",
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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": "6.14",
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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": "6.18.46",
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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": "7.1.10",
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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": "6.14",
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"versionEndExcluding": "6.18.46"
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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": "6.14",
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"versionEndExcluding": "7.1.10"
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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": "6.14",
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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/16a2716910ecf7d31bf3c033ee7c506a0b00b2ee"
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},
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{
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"url": "https://git.kernel.org/stable/c/16bcea56f4205314ec2aa04a7ec74e5261d253c7"
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},
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{
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"url": "https://git.kernel.org/stable/c/60baa179ed1333535f6e2da4133511db55278ee4"
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}
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],
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"title": "drm/log: Fix out-of-bounds read on empty message length",
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"x_generator": {
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