208 lines
10 KiB
JSON
208 lines
10 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-2026-74729",
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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": "2026-08-15T05:44:03.929Z",
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"datePublished": "2026-08-22T15:33:19.037Z",
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"dateUpdated": "2026-10-30T12:30:24.911Z"
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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": "2026-10-30T12:30:24.911Z"
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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\nsoc: aspeed: lpc-snoop: Fix usercopy overflow in snoop_file_read\n\nput_fifo_with_discard() acts as both producer and consumer on the kfifo:\nit calls kfifo_skip() (advances out) and kfifo_put() (advances in) from\nthe IRQ handler without synchronizing with snoop_file_read(), which also\nconsumes via kfifo_to_user(). On SMP systems this concurrent access can\nleave (in - out) larger than the ring buffer, so __kfifo_to_user()'s clamp\nto (in - out) is ineffective and kfifo_copy_to_user() can attempt a\ncopy_to_user() past the kmalloc-2k backing store:\n\n usercopy: Kernel memory exposure attempt detected from SLUB object\n 'kmalloc-2k' (offset 0, size 2049)!\n kernel BUG at mm/usercopy.c!\n Call trace:\n usercopy_abort\n __check_heap_object\n __check_object_size\n kfifo_copy_to_user\n __kfifo_to_user\n snoop_file_read\n vfs_read\n\nSerialize kfifo access with a per-channel spinlock shared between the\nIRQ handler (producer) and the file reader (consumer). Annotate @fifo\nwith __guarded_by(&lock) and opt the driver into context analysis so the\ncompiler enforces that all fifo access holds the lock."
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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/soc/aspeed/Makefile",
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"drivers/soc/aspeed/aspeed-lpc-snoop.c"
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],
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"versions": [
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{
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"version": "3772e5da445420543b25825ac2b5971f3743f6e8",
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"lessThan": "f62afe827c52c300c64715631e6ac9e576c5112d",
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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": "3772e5da445420543b25825ac2b5971f3743f6e8",
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"lessThan": "b87c0d24386ed5106feac12034fe09d893ccb469",
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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": "3772e5da445420543b25825ac2b5971f3743f6e8",
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"lessThan": "afe2527eae0b51d5e8ddd77293afab3a5a1311a4",
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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": "3772e5da445420543b25825ac2b5971f3743f6e8",
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"lessThan": "868c478abce858135db3eb65548a577e4b6747ac",
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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": "3772e5da445420543b25825ac2b5971f3743f6e8",
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"lessThan": "131ab677b03349a5ae48da8722ec7075b37ec66e",
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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": "3772e5da445420543b25825ac2b5971f3743f6e8",
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"lessThan": "1acef6d85bfd98bd9dfe1f08bffa397a4dda8a6f",
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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/soc/aspeed/Makefile",
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"drivers/soc/aspeed/aspeed-lpc-snoop.c"
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],
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"versions": [
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{
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"version": "4.19",
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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": "4.19",
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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": "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": "7.1.9",
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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": "4.19",
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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": "4.19",
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"versionEndExcluding": "6.6.160"
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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": "4.19",
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"versionEndExcluding": "6.12.114"
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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": "4.19",
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"versionEndExcluding": "6.18.57"
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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": "4.19",
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"versionEndExcluding": "7.1.9"
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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": "4.19",
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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/f62afe827c52c300c64715631e6ac9e576c5112d"
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},
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{
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"url": "https://git.kernel.org/stable/c/b87c0d24386ed5106feac12034fe09d893ccb469"
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},
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{
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"url": "https://git.kernel.org/stable/c/afe2527eae0b51d5e8ddd77293afab3a5a1311a4"
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},
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{
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"url": "https://git.kernel.org/stable/c/868c478abce858135db3eb65548a577e4b6747ac"
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},
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{
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"url": "https://git.kernel.org/stable/c/131ab677b03349a5ae48da8722ec7075b37ec66e"
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},
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{
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"url": "https://git.kernel.org/stable/c/1acef6d85bfd98bd9dfe1f08bffa397a4dda8a6f"
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}
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],
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"title": "soc: aspeed: lpc-snoop: Fix usercopy overflow in snoop_file_read",
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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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} |