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CVE-2026-74724— ipvs: avoid out-of-bounds write in ip_vs_nat_icmp

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，已修复以下漏洞： ipvs：避免在 ip_vs_nat_icmp 中发生越界写入 Sashiko 警告称，本地攻击者可以在 IPVS 处理数据包时篡改数据包。代码中存在多次读取 IP 头部中 ihl（Internet Header Length，IP 头长度）字段的情况，这可能导致越界访问。其中一处便是 ip_vs_nat_icmp 函数，我们可能在该函数中向已验证区域之外进行写入。 修复方法如下：参照 IPv6 的处理方式，引入 ciph 参数，并使用 ciph->len 作为到内嵌传输层

AI Predicted 5.5 Difficulty: Moderate EPSS 0.21% · P11

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 3b8f79af0e98f27b932b0b416e9c52b692d31ff9 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 3c779b258c9c3c3567af68d4f45c2f751f35bd0e affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< be65fa324640c7a95e30b146159a2be5cc73f22e affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< a69a4b3fff5814d079beff9a1e9d369994b2ed47 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 243d0187ec4c3837b9b0004f18d1068e46115760 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 646922a0379496154e8c8faca4f8e2fd9100cacc affected
2.6.12 affected
< 2.6.12 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-74724

Vulnerability Information
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Vulnerability Title
ipvs: avoid out-of-bounds write in ip_vs_nat_icmp
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ipvs: avoid out-of-bounds write in ip_vs_nat_icmp Sashiko warns that local attacker can modify the packet while it is processed by IPVS. Some places read the IP ihl field multiple times which can cause out-of-bounds access. One such place is ip_vs_nat_icmp where we can write after the validated area. Fix it by providing ciph argument just like it is done for IPv6 and use ciph->len as offset to the embedded transport header. Modify some IPv4 header checks by reading the ihl field only once.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ 3b8f79af0e98f27b932b0b416e9c52b692d31ff9 -
Linux Linux 2.6.12 -

II. Public POCs for CVE-2026-74724

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III. Intelligence Information for CVE-2026-74724

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Patches & Fixes for CVE-2026-74724 (6)

Same Patch Batch · Linux · 2026-08-22 · 150 CVEs total

CVE-2026-74638 drm/v3d: Serialize the scheduler timeout handlers
CVE-2026-74621 net/sched: act_ct: fix sk_buff leak when the header checks reject a packet
CVE-2026-74622 net: atlantic: free RX pages of consumed but not refilled buffers
CVE-2026-74623 net: atlantic: free stranded TX buffers on ring deinit
CVE-2026-74624 netfilter: nf_conntrack: defer invalid log until after unlock
CVE-2026-74625 netfilter: bridge: release template ct on non-IP path
CVE-2026-74627 net: devmem: prevent net-iov / page mixing
CVE-2026-74626 NTB: ntb_netdev: Preserve RX queue depth on allocation failure
CVE-2026-74628 net/x25: fix use-after-free of the socket by its timers
CVE-2026-74629 net/dibs: Correct freeing of dmb_clientid_arr
CVE-2026-74631 net: smc: fix splice entry lifetime imbalance in smc_rx_splice
CVE-2026-74630 ipv6: prevent in6_dev_get() from resurrecting inet6_dev
CVE-2026-74632 mm/huge_memory: fix huge_zero_pfn race
CVE-2026-74633 tracing: Fix NULL pointer dereference in module event cache removal
CVE-2026-74634 ring-buffer: Prevent subbuf order change when resizing is disabled
CVE-2026-74635 fbdev: bitblit: bound-check glyph index in bit_cursor()
CVE-2026-74636 tracing: Fix race between update_event_fields and, event_define_fields
CVE-2026-74637 perf/core: Fix group leader use-after-free after sibling detach
CVE-2026-74639 ALSA: us144mkii: re-anchor capture URBs on resubmission
CVE-2026-74650 staging: rtl8723bs: fix OOB read in WMM_param_handler()

Showing top 20 of 150 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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