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CVE-2026-53268— netfilter: conntrack_irc: fix possible out-of-bounds read

CVSS 8.2 · High EPSS 0.34% · P27

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProductVersion RangeStatus
LinuxLinux869f37d8e48f3911eb70f38a994feaa8f8380008< 4cdda7f868f48e2f81579371584fdbdce37df2c8affected
869f37d8e48f3911eb70f38a994feaa8f8380008< 8a1d6e40dedfe1068aee094d851bd69e289c9fd6affected
869f37d8e48f3911eb70f38a994feaa8f8380008< 0afc802160af0df61ed374fdb97fb34cfe5cdf2faffected
869f37d8e48f3911eb70f38a994feaa8f8380008< 7c34f91305292083253df6a9f6c8ede02d4ccaeaaffected
869f37d8e48f3911eb70f38a994feaa8f8380008< ddddd8271359961e403d11c90c9ba9fc38914f7eaffected
869f37d8e48f3911eb70f38a994feaa8f8380008< 9e5da2379f968a3ea5a6e38921ab6201576466dcaffected
869f37d8e48f3911eb70f38a994feaa8f8380008< 573810f61bcd6b6815e2ff53bbdd2b9c9d747176affected
869f37d8e48f3911eb70f38a994feaa8f8380008< 66eba0ffce3b7e11449946b4cbbef8ea36112f56affected
… +10 more rows
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I. Basic Information for CVE-2026-53268

Vulnerability Information
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Vulnerability Title
netfilter: conntrack_irc: fix possible out-of-bounds read
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack_irc: fix possible out-of-bounds read When parsing fails after we've matched the command string we should bail out instead of trying to match a different command. This helper should be deprecated, given prevalence of TLS I doubt it has any relevance in 2026.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
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基金会开源的操作系统Linux所使用的内核。 Linux kernel 2.6.20版本存在安全漏洞，该漏洞源于解析失败后未及时退出，可能导致越界读取。
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 869f37d8e48f3911eb70f38a994feaa8f8380008 ~ 4cdda7f868f48e2f81579371584fdbdce37df2c8 -
LinuxLinux 2.6.20 -

II. Public POCs for CVE-2026-53268

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III. Intelligence Information for CVE-2026-53268

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Patches & Fixes for CVE-2026-53268 (8)

Same Patch Batch · Linux · 2026-06-25 · 146 CVEs total

CVE-2026-532479.8 CRITICALnet: ethernet: mtk_eth_soc: Fix use-after-free in metadata dst teardown
CVE-2026-531759.8 CRITICALinet: frags: fix use-after-free caused by the fqdir_pre_exit() flush
CVE-2026-531769.8 CRITICALIB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN
CVE-2026-532289.8 CRITICALipv6: sit: reload inner IPv6 header after GSO offloads
CVE-2026-532219.8 CRITICALip6_vti: fix incorrect tunnel matching in vti6_tnl_lookup()
CVE-2026-532469.8 CRITICALsctp: validate cached peer INIT chunk length in COOKIE_ECHO processing
CVE-2026-531519.8 CRITICALrxrpc: Fix the ACK parser to extract the SACK table for parsing
CVE-2026-532609.8 CRITICALtcp: Add preempt_{disable,enable}_nested() in reqsk_queue_hash_req().
CVE-2026-532169.8 CRITICALnet: mvpp2: limit XDP frame size to the RX buffer
CVE-2026-532159.8 CRITICALnet: mvpp2: refill RX buffers before XDP or skb use
CVE-2026-531319.4 CRITICALnetfilter: require Ethernet MAC header before using eth_hdr()
CVE-2026-532259.1 CRITICALsctp: fix uninit-value in __sctp_rcv_asconf_lookup()
CVE-2026-531869.1 CRITICALRDMA/srp: bound SRP_RSP sense copy by the received length
CVE-2026-532249.1 CRITICALsctp: validate embedded INIT chunk and address list lengths in cookie
CVE-2026-532778.8 HIGHKVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation
CVE-2026-532668.8 HIGHnetfilter: bridge: make ebt_snat ARP rewrite writable
CVE-2026-531598.8 HIGHmisc: fastrpc: fix DMA address corruption due to find_vma misuse
CVE-2026-532408.8 HIGHxfrm: iptfs: fix use-after-free on first_skb in __input_process_payload
CVE-2026-531888.8 HIGHRDMA/core: Validate the passed in fops for ib_get_ucaps()
CVE-2026-532758.8 HIGHipv6: mcast: Fix use-after-free when processing MLD queries

Showing top 20 of 146 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-53268

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