170 lines
8.8 KiB
JSON
170 lines
8.8 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-2025-22030",
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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": "2024-12-29T08:45:45.808Z",
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"datePublished": "2025-04-16T14:11:50.625Z",
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"dateUpdated": "2026-05-23T15:57:40.079Z"
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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": "2026-05-23T15:57:40.079Z"
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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\nmm: zswap: fix crypto_free_acomp() deadlock in zswap_cpu_comp_dead()\n\nCurrently, zswap_cpu_comp_dead() calls crypto_free_acomp() while holding\nthe per-CPU acomp_ctx mutex. crypto_free_acomp() then holds scomp_lock\n(through crypto_exit_scomp_ops_async()).\n\nOn the other hand, crypto_alloc_acomp_node() holds the scomp_lock (through\ncrypto_scomp_init_tfm()), and then allocates memory. If the allocation\nresults in reclaim, we may attempt to hold the per-CPU acomp_ctx mutex.\n\nThe above dependencies can cause an ABBA deadlock. For example in the\nfollowing scenario:\n\n(1) Task A running on CPU #1:\n crypto_alloc_acomp_node()\n Holds scomp_lock\n Enters reclaim\n Reads per_cpu_ptr(pool->acomp_ctx, 1)\n\n(2) Task A is descheduled\n\n(3) CPU #1 goes offline\n zswap_cpu_comp_dead(CPU #1)\n Holds per_cpu_ptr(pool->acomp_ctx, 1))\n Calls crypto_free_acomp()\n Waits for scomp_lock\n\n(4) Task A running on CPU #2:\n Waits for per_cpu_ptr(pool->acomp_ctx, 1) // Read on CPU #1\n DEADLOCK\n\nSince there is no requirement to call crypto_free_acomp() with the per-CPU\nacomp_ctx mutex held in zswap_cpu_comp_dead(), move it after the mutex is\nunlocked. Also move the acomp_request_free() and kfree() calls for\nconsistency and to avoid any potential sublte locking dependencies in the\nfuture.\n\nWith this, only setting acomp_ctx fields to NULL occurs with the mutex\nheld. This is similar to how zswap_cpu_comp_prepare() only initializes\nacomp_ctx fields with the mutex held, after performing all allocations\nbefore holding the mutex.\n\nOpportunistically, move the NULL check on acomp_ctx so that it takes place\nbefore the mutex dereference."
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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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"mm/zswap.c"
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],
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"versions": [
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{
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"version": "8d29ff5d50304daa41dc3cfdda4a9d1e46cf5be1",
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"lessThan": "747e3eec1d7d124ea90ed3d7b85369df8b4e36d2",
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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": "12dcb0ef540629a281533f9dedc1b6b8e14cfb65",
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"lessThan": "a8d18000e9d2d97aaf105f5f9b3b0e8a6fbf8b96",
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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": "12dcb0ef540629a281533f9dedc1b6b8e14cfb65",
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"lessThan": "717d9c35deff6c33235693171bacbb03e9643fa4",
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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": "12dcb0ef540629a281533f9dedc1b6b8e14cfb65",
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"lessThan": "c11bcbc0a517acf69282c8225059b2a8ac5fe628",
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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": "6.12.12",
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"lessThan": "6.12.23",
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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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"mm/zswap.c"
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],
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"versions": [
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{
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"version": "6.13",
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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": "6.13",
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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": "6.12.23",
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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": "6.13.11",
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"lessThanOrEqual": "6.13.*",
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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": "6.14.2",
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"lessThanOrEqual": "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": "6.15",
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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": "6.12.12",
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"versionEndExcluding": "6.12.23"
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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": "6.13",
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"versionEndExcluding": "6.13.11"
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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": "6.13",
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"versionEndExcluding": "6.14.2"
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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": "6.13",
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"versionEndExcluding": "6.15"
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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/747e3eec1d7d124ea90ed3d7b85369df8b4e36d2"
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},
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{
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"url": "https://git.kernel.org/stable/c/a8d18000e9d2d97aaf105f5f9b3b0e8a6fbf8b96"
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},
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{
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"url": "https://git.kernel.org/stable/c/717d9c35deff6c33235693171bacbb03e9643fa4"
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},
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{
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"url": "https://git.kernel.org/stable/c/c11bcbc0a517acf69282c8225059b2a8ac5fe628"
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}
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],
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"title": "mm: zswap: fix crypto_free_acomp() deadlock in zswap_cpu_comp_dead()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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} |