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CVE-2022-49556— KVM: SVM: Use kzalloc for sev ioctl interfaces to prevent kernel data leak

AI Predicted 7.8 Difficulty: Easy EPSS 0.27% · P19

Affected Version Matrix 12

VendorProductVersion RangeStatus
LinuxLinuxeaf78265a4ab33935d3a0f1407ce4a91aac4d4d5< 401bef1f95de92c3a8c6eece46e02fa88d7285eeaffected
eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5< d8fdb4b24097472ff6b3c0559448200d420b1418affected
eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5< bbdcc644b59e01e98c68894a9fab42b9687f42b0affected
eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5< 57a01725339f9d82b099102ba2751621b1caab93affected
eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5< d22d2474e3953996f03528b84b7f52cc26a39403affected
5.7affected
< 5.7unaffected
5.10.124≤ 5.10.*unaffected
… +4 more rows
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I. Basic Information for CVE-2022-49556

Vulnerability Information
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Vulnerability Title
KVM: SVM: Use kzalloc for sev ioctl interfaces to prevent kernel data leak
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Use kzalloc for sev ioctl interfaces to prevent kernel data leak For some sev ioctl interfaces, the length parameter that is passed maybe less than or equal to SEV_FW_BLOB_MAX_SIZE, but larger than the data that PSP firmware returns. In this case, kmalloc will allocate memory that is the size of the input rather than the size of the data. Since PSP firmware doesn't fully overwrite the allocated buffer, these sev ioctl interface may return uninitialized kernel slab memory.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于SEV ioctl接口未正确分配内存，可能导致内核数据泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5 ~ 401bef1f95de92c3a8c6eece46e02fa88d7285ee -
LinuxLinux 5.7 -

II. Public POCs for CVE-2022-49556

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III. Intelligence Information for CVE-2022-49556

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Patches & Fixes for CVE-2022-49556 (5)

Same Patch Batch · Linux · 2025-02-26 · 706 CVEs total

CVE-2022-491499.8 CRITICALrxrpc: Fix call timer start racing with call destruction
CVE-2022-492019.8 CRITICALibmvnic: fix race between xmit and reset
CVE-2022-491949.8 CRITICALnet: bcmgenet: Use stronger register read/writes to assure ordering
CVE-2022-490939.8 CRITICALskbuff: fix coalescing for page_pool fragment recycling
CVE-2022-490949.8 CRITICALnet/tls: fix slab-out-of-bounds bug in decrypt_internal
CVE-2022-494079.8 CRITICALdlm: fix plock invalid read
CVE-2022-493629.8 CRITICALNFSD: Fix potential use-after-free in nfsd_file_put()
CVE-2022-492609.8 CRITICALcrypto: hisilicon/sec - fix the aead software fallback for engine
CVE-2022-494189.8 CRITICALNFSv4: Fix free of uninitialized nfs4_label on referral lookup.
CVE-2022-492809.8 CRITICALNFSD: prevent underflow in nfssvc_decode_writeargs()
CVE-2022-493569.8 CRITICALSUNRPC: Trap RDMA segment overflows
CVE-2022-495619.8 CRITICALnetfilter: conntrack: re-fetch conntrack after insertion
CVE-2022-490589.1 CRITICALcifs: potential buffer overflow in handling symlinks
CVE-2022-494708.8 HIGHBluetooth: btmtksdio: fix use-after-free at btmtksdio_recv_event
CVE-2022-494798.8 HIGHmt76: fix tx status related use-after-free race on station removal
CVE-2022-495358.8 HIGHscsi: lpfc: Fix null pointer dereference after failing to issue FLOGI and PLOGI
CVE-2022-493288.8 HIGHmt76: fix use-after-free by removing a non-RCU wcid pointer
CVE-2022-495198.8 HIGHath10k: skip ath10k_halt during suspend for driver state RESTARTING
CVE-2022-495008.8 HIGHwl1251: dynamically allocate memory used for DMA
CVE-2022-491148.8 HIGHscsi: libfc: Fix use after free in fc_exch_abts_resp()

Showing top 20 of 706 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-49556

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