CVE-2026-90049— net: skbuff: don't skb_tx_error() the source skb in skb_zerocopy()
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
In the Linux kernel, the following vulnerability has been resolved: net: skbuff: don't skb_tx_error() the source skb in skb_zerocopy() skb_zerocopy() copies frags from @from into @to. On an skb_orphan_frags() failure it calls skb_tx_error(@from), a destructive
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一、 漏洞 CVE-2026-90049 基础信息
漏洞信息
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
net: skbuff: don't skb_tx_error() the source skb in skb_zerocopy()
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net: skbuff: don't skb_tx_error() the source skb in skb_zerocopy()
skb_zerocopy() copies frags from @from into @to. On an
skb_orphan_frags() failure it calls skb_tx_error(@from), a destructive
operation on the source skb the copy helper does not own. That completes
@from's zerocopy uarg and clears SKBFL_ALL_ZEROCOPY, including the
SKBFL_SHARED_FRAG page-ownership marker.
Both callers already report the failure on their own drop path.
nfnetlink_queue does it at nla_put_failure, and Open vSwitch does it in
the flow-miss drop arm of ovs_dp_process_packet(), so nothing is lost by
dropping it here.
On Open vSwitch's OVS_ACTION_ATTR_USERSPACE path the skb is not freed on
this error: do_execute_actions() ignores output_userspace()'s return
value and, unless the upcall was the last action, keeps forwarding the
same skb through the flow's remaining actions. The uarg is completed
while that skb is still in flight, telling the producer its buffers are
free, and SKBFL_SHARED_FRAG is cleared on an skb the rest of the stack
still handles. That flag is what makes esp_input() call skb_cow_data()
instead of decrypting in place, so a later local ESP delivery can
decrypt over frags the skb does not own privately.
Leave error reporting to the callers.
来源: CVE Program / CVE List V5
CVSS Information
N/A
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-90049 的公开POC
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CVE-2026-90049 其他参考 (8)
同批安全公告 · Linux · 2026-09-16 · 共 276 条
| CVE-2026-89859 | scsi: qla2xxx: Zero dport diagnostics buffer to avoid info leak | |
| CVE-2026-89875 | media: ti: vpe: quiesce overflow recovery before freeing streams | |
| CVE-2026-89876 | media: tda18250: fix possible integer overflow | |
| CVE-2026-89874 | media: v4l2-async: avoid deleting unlinked ASC entry on link error | |
| CVE-2026-89872 | media: v4l2-fwnode: Fix fwnode leak in v4l2_fwnode_parse_link | |
| CVE-2026-89873 | media: v4l2-ctrls: validate HEVC EXT SPS RPS counts | |
| CVE-2026-89871 | media: video-i2c: fix kthread error pointer left in kthread_vid_cap on failure | |
| CVE-2026-89870 | media: zoran: Avoid freeing a registered video_device twice | |
| CVE-2026-89869 | media: qcom: iris: use disable_irq() during power-off | |
| CVE-2026-89868 | media: chips-media: wave5: Add timeout while stop_streaming | |
| CVE-2026-89867 | media: chips-media: wave5: Defer job_finish() only when a DEC_PIC was queued | |
| CVE-2026-89866 | Chips-Media Wave5 EOS前恢复设备 | |
| CVE-2026-89865 | scsi: qla2xxx: Zero SFP DMA buffer in FRU/I2C bsg handlers | |
| CVE-2026-89864 | scsi: qla2xxx: Bound i2c->length in I2C bsg handlers | |
| CVE-2026-89863 | scsi: qla2xxx: edif: Fix NULL pointer deref in RX SA delete check | |
| CVE-2026-89862 | scsi: qla2xxx: Fix BSG job leak on validate flash image error path | |
| CVE-2026-89861 | scsi: qla2xxx: Hold vport reference in qla24xx_report_id_acquisition() | |
| CVE-2026-89860 | scsi: qla2xxx: Initialize NVMe abort_work once at submission | |
| CVE-2026-89849 | scsi: qla2xxx: Reject non-SCSI SRB on status IOCB fast path | |
| CVE-2026-89847 | scsi: qla2xxx: Avoid double completion in async IOCB timeout |
显示前 20 条，共 276 条。 查看全部 → →
IV. Related Vulnerabilities
Same product: Linux
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CVE-2026-90048
fs/ntfs3: fix slab-out-of-bounds write in ni_create_attr_lis -
CVE-2026-90047
drm/xe: Don't hand out the flat CCS storage as usable VRAM -
CVE-2026-90046
mm/page_alloc: don't spin_trylock() in NMI on UP -
CVE-2026-90044
usb: gadget: f_fs: Fix Use-After-Free in AIO error path -
CVE-2026-90045
USB: gadget: ffs: fix mm lifetime handling
Same vendor: Linux
-
CVE-2026-90048
fs/ntfs3: fix slab-out-of-bounds write in ni_create_attr_lis -
CVE-2026-90047
drm/xe: Don't hand out the flat CCS storage as usable VRAM -
CVE-2026-90046
mm/page_alloc: don't spin_trylock() in NMI on UP -
CVE-2026-90044
usb: gadget: f_fs: Fix Use-After-Free in AIO error path -
CVE-2026-90045
USB: gadget: ffs: fix mm lifetime handling
V. Comments for CVE-2026-90049
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