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CVE-2026-53227— net: openvswitch: fix possible kfree_skb of ERR_PTR

AI Predicted 4.7 Difficulty: Moderate EPSS 0.14% · P3

Affected Version Matrix 18

VendorProductVersion RangeStatus
LinuxLinux893f139b9a6c00c097b9082a90f3041cfb3a0d20< e248fb2e680deb2bd37bac551b72638fe4938a76affected
893f139b9a6c00c097b9082a90f3041cfb3a0d20< 0bb5b2dc1b90aa7dd1473fc8c4d813a29255ff8daffected
893f139b9a6c00c097b9082a90f3041cfb3a0d20< 971b1b37774f13acc5add0a2843f8598446b8598affected
893f139b9a6c00c097b9082a90f3041cfb3a0d20< 25fdf53698535fe8790237f5a8a9626791429785affected
893f139b9a6c00c097b9082a90f3041cfb3a0d20< e3d509a1b71396e1452060dbf84a805fd1c3c549affected
893f139b9a6c00c097b9082a90f3041cfb3a0d20< ecc55aad3390129a87106841f4b68bf3d70c9264affected
893f139b9a6c00c097b9082a90f3041cfb3a0d20< 895d1dd9057cde1687fa0f4286d47ceed0b82997affected
893f139b9a6c00c097b9082a90f3041cfb3a0d20< ee30dd2909d8b98619f4341c70ec8dc8e155ab02affected
… +10 more rows
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I. Basic Information for CVE-2026-53227

Vulnerability Information
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Vulnerability Title
net: openvswitch: fix possible kfree_skb of ERR_PTR
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: fix possible kfree_skb of ERR_PTR After the patch in the "Fixes" tag, the allocation of the "reply" skb can happen either before or after locking the ovs_mutex. However, error cleanups still follow the classical reversed order, assuming "reply" is allocated before locking: it is freed after unlocking. If "reply" allocation happens after locking the mutex and it fails, "reply" is left with an ERR_PTR, and execution jumps to the correspondent cleanup stage which will try to free an invalid pointer. Fix this by setting the pointer to NULL after having saved its error value.
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基金会开源的操作系统Linux所使用的内核。 Linux kernel 3.16之前版本存在安全漏洞，该漏洞源于openvswitch模块中"reply" skb分配在锁定ovs_mutex前后都可能发生，但错误清理仍按锁定前的顺序，当分配失败时可能导致释放无效指针。
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 893f139b9a6c00c097b9082a90f3041cfb3a0d20 ~ e248fb2e680deb2bd37bac551b72638fe4938a76 -
LinuxLinux 3.16 -

II. Public POCs for CVE-2026-53227

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III. Intelligence Information for CVE-2026-53227

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Patches & Fixes for CVE-2026-53227 (8)

Same Patch Batch · Linux · 2026-06-25 · 147 CVEs total

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-2026-532219.8 CRITICALip6_vti: fix incorrect tunnel matching in vti6_tnl_lookup()
CVE-2026-532289.8 CRITICALipv6: sit: reload inner IPv6 header after GSO offloads
CVE-2026-532169.8 CRITICALnet: mvpp2: limit XDP frame size to the RX buffer
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-2026-532159.8 CRITICALnet: mvpp2: refill RX buffers before XDP or skb use
CVE-2026-532479.8 CRITICALnet: ethernet: mtk_eth_soc: Fix use-after-free in metadata dst teardown
CVE-2026-532469.8 CRITICALsctp: validate cached peer INIT chunk length in COOKIE_ECHO processing
CVE-2026-531319.4 CRITICALnetfilter: require Ethernet MAC header before using eth_hdr()
CVE-2026-532249.1 CRITICALsctp: validate embedded INIT chunk and address list lengths in cookie
CVE-2026-531869.1 CRITICALRDMA/srp: bound SRP_RSP sense copy by the received length
CVE-2026-532259.1 CRITICALsctp: fix uninit-value in __sctp_rcv_asconf_lookup()
CVE-2026-532008.8 HIGHKVM: arm64: nv: Fix handling of XN[0] when !FEAT_XNX
CVE-2026-532778.8 HIGHKVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation
CVE-2026-532328.8 HIGHnet: phy: clean the sfp upstream if phy probing fails
CVE-2026-532488.8 HIGHnet: airoha: Fix use-after-free in metadata dst teardown
CVE-2026-531988.8 HIGHksmbd: fix use-after-free of a deferred file_lock on double SMB2_CANCEL
CVE-2026-532408.8 HIGHxfrm: iptfs: fix use-after-free on first_skb in __input_process_payload

Showing top 20 of 147 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-53227

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