CVE-2026-89487High· 7.8▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: openvswitch: only skb_tx_error() a packet we are about to drop queue_userspace_packet() borrows the packet skb -- it only copies it into a private netlink message (use…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
— → 7.1
none → high
— → 7.8
none → high
7.8 → 7.1
7.1 → 7.8
7.8 → 7
0.2% → 0.2%
7 → 7.8
Last analysed / modified upstream
In the Linux kernel, the following vulnerability has been resolved:
openvswitch: only skb_tx_error() a packet we are about to drop
queue_userspace_packet() borrows the packet skb -- it only copies it into a private netlink message (user_skb) and does not own it; on return do_execute_actions() keeps forwarding it through the flow's remaining actions. Its error path nevertheless calls skb_tx_error(skb), which via skb_zcopy_clear() does skb_shinfo(skb)->flags &= ~SKBFL_ALL_ZEROCOPY, stripping SKBFL_SHARED_FRAG from that live skb (skb_tx_error()'s kerneldoc says "skb must be freed afterwards").
For a MSG_ZEROCOPY skb carrying page-cache frags, SKBFL_SHARED_FRAG is what makes esp_input() skb_cow_data() before in-place AEAD; once it is stripped a later local ESP-in-UDP delivery decrypts in place over pages the sender does not own -- an unprivileged page-cache write (the "Fragnesia" primitive). do_execute_actions() ignores output_userspace()'s return value, so any action after a failed USERSPACE upcall inherits the stripped skb.
Move the skb_tx_error() to the flow-miss drop path - the "default" branch of ovs_dp_process_packet()'s switch(error), before kfree_skb().
The call has been here since commit 36d5fe6a0007 ("core, nfqueue, openvswitch: Orphan frags in skb_zerocopy and handle errors") but was harmless until esp_input() began relying on SKBFL_SHARED_FRAG to gate in-place decrypt; only then did stripping it on a still-forwarded skb become a page-cache write primitive.
Linux >= 36d5fe6a000790f56039afe26834265db0a3ad4c < 5de5d554141a15b3f1f5c978fd9f7f4fd6d0600aLinux >= 36d5fe6a000790f56039afe26834265db0a3ad4c < 48db11e115d1b232edc5591604adc6eda95cd545Linux >= 36d5fe6a000790f56039afe26834265db0a3ad4c < 4477222e2916a18e273edc139c955ade6bbb7a69Linux >= 36d5fe6a000790f56039afe26834265db0a3ad4c < 4d5c460ef8754be1d43b16dbf02695b008b207d6Linux >= 36d5fe6a000790f56039afe26834265db0a3ad4c < 6767d70cf46f65807a6a4c4406a518e6c12e36aeLinux >= 36d5fe6a000790f56039afe26834265db0a3ad4c < e41a59fc056f63a7a1f42788913c53cc48d744aaLinux >= 36d5fe6a000790f56039afe26834265db0a3ad4c < 5d85eef222cfd28e73deed7402c100229e8b9e6eLinux >= 36d5fe6a000790f56039afe26834265db0a3ad4c < 0dbc2398fca3bb33eda963849f865ddb1b3aa05eLinux c5f0c0e7525443add533495e93ba8de6feab2396Linux 1674b4bf3eea3cac51b70778e89f8025f7cfe695Linux >= 3.10.51 < 3.11Linux >= 3.12.40 < 3.13Linux 3.14Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2024-57804High· 7.3scsi: mpi3mr: Fix corrupt config pages PHY state is switched in sysfs
CVE-2024-47794High· 7.8bpf: Prevent tailcall infinite loop caused by freplace
CVE-2026-100070Medium· 5.5In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_nat_sip: rewind offset when NAT shrinks the packet sashiko says: If map_addr() changes the packet length, such as when the public NAT IP string is shor…
CVE-2026-100071Medium· 5.5In the Linux kernel, the following vulnerability has been resolved: net: hsr: free learned nodes on device setup failure hsr_dev_finalize() can fail after a lower-device RX handler has already been registered (slave A is added before t…
CVE-2025-39977High· 7.8In the Linux kernel, the following vulnerability has been resolved: futex: Prevent use-after-free during requeue-PI syzbot managed to trigger the following race: T1 T2 futex_wait_requeue_pi() fute…
CVE-2026-99100Nonewifi: p54: validate firmware record lengths