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CVE-2026-23443— ACPI: processor: Fix previous acpi_processor_errata_piix4() fix

AI Predicted 5.5 Difficulty: Moderate EPSS 0.01% · P3

Affected Version Matrix 13

VendorProductVersion RangeStatus
LinuxLinux06724a60cfa9767ea90b0f5d3dfb5cdd251b64f5< 68408e8f9e366ad9850a66ac65cb569f13bf6cd4affected
ad86ac604f8391c0212a91412d4f764c7a85f254< 2e369ba9eb7b8a06e9cc35a3e7fe73e59272f8c2affected
01e8751b37a366b1ca561add0042f2ceb18c03bf< edf4c2aaee08e8fd503fbae705c801e92a0b55d7affected
b803811485ac0b2f774b6bf3abc8b999ba3b7033< e0c470049344e9346fff79d7e2362212c216665eaffected
29f60d3d06818d40118a30d663231f027ae87a05< 98473309a36acc271009b85e0bb53a4c0dddf5c2affected
0398b641be2b66c2fc7e0163c606ef19372e7ad5< 8583f62259e1b315d5239371adfb36939cdab741affected
f132e089fe89cadc2098991f0a3cb05c3f824ac6< bf504b229cb8d534eccbaeaa23eba34c05131e25affected
5.15.202< 5.15.203affected
… +5 more rows
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I. Basic Information for CVE-2026-23443

Vulnerability Information
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Vulnerability Title
ACPI: processor: Fix previous acpi_processor_errata_piix4() fix
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ACPI: processor: Fix previous acpi_processor_errata_piix4() fix After commi f132e089fe89 ("ACPI: processor: Fix NULL-pointer dereference in acpi_processor_errata_piix4()"), device pointers may be dereferenced after dropping references to the device objects pointed to by them, which may cause a use-after-free to occur. Moreover, debug messages about enabling the errata may be printed if the errata flags corresponding to them are unset. Address all of these issues by moving message printing to the points in the code where the errata flags are set.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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，该漏洞源于释放后重用，可能导致空指针取消引用。
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 06724a60cfa9767ea90b0f5d3dfb5cdd251b64f5 ~ 68408e8f9e366ad9850a66ac65cb569f13bf6cd4 -
LinuxLinux 5.15.202 ~ 5.15.203 -

II. Public POCs for CVE-2026-23443

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III. Intelligence Information for CVE-2026-23443

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Same Patch Batch · Linux · 2026-04-03 · 72 CVEs total

CVE-2026-234509.8 CRITICALnet/smc: fix NULL dereference and UAF in smc_tcp_syn_recv_sock()
CVE-2026-314029.8 CRITICALnfsd: fix heap overflow in NFSv4.0 LOCK replay cache
CVE-2026-234279.8 CRITICALksmbd: fix use-after-free in durable v2 replay of active file handles
CVE-2026-234289.8 CRITICALksmbd: fix use-after-free of share_conf in compound request
CVE-2026-234559.1 CRITICALnetfilter: nf_conntrack_h323: check for zero length in DecodeQ931()
CVE-2026-234618.8 HIGHBluetooth: L2CAP: Fix use-after-free in l2cap_unregister_user
CVE-2026-234628.8 HIGHBluetooth: HIDP: Fix possible UAF
CVE-2026-234258.8 HIGHKVM: arm64: Fix ID register initialization for non-protected pKVM guests
CVE-2026-234578.6 HIGHnetfilter: nf_conntrack_sip: fix Content-Length u32 truncation in sip_help_tcp()
CVE-2026-234568.2 HIGHnetfilter: nf_conntrack_h323: fix OOB read in decode_int() CONS case
CVE-2026-234598.2 HIGHip_tunnel: adapt iptunnel_xmit_stats() to NETDEV_PCPU_STAT_DSTATS
CVE-2026-313938.1 HIGHBluetooth: L2CAP: Validate L2CAP_INFO_RSP payload length before access
CVE-2026-313928.1 HIGHsmb: client: fix krb5 mount with username option
CVE-2026-314037.8 HIGHNFSD: Hold net reference for the lifetime of /proc/fs/nfs/exports fd
CVE-2026-313897.8 HIGHspi: fix use-after-free on controller registration failure
CVE-2026-234377.8 HIGHnet: shaper: protect late read accesses to the hierarchy
CVE-2026-234587.8 HIGHnetfilter: ctnetlink: fix use-after-free in ctnetlink_dump_exp_ct()
CVE-2026-234447.8 HIGHwifi: mac80211: always free skb on ieee80211_tx_prepare_skb() failure
CVE-2026-234457.8 HIGHigc: fix page fault in XDP TX timestamps handling
CVE-2026-234497.8 HIGHnet/sched: teql: Fix double-free in teql_master_xmit

Showing top 20 of 72 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-23443

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