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CVE-2022-49975— bpf: Don't redirect packets with invalid pkt_len

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.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于重定向无效pkt_len的数据包，可能导致空流丢弃。

AI Predicted 5.5 Difficulty: Easy EPSS 0.27% · P18

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 5293efe62df81908f2e90c9820c7edcc8e61f5e9< 8b68e53d56697a59b5c53893b53f508bbdf272a0 affected
5293efe62df81908f2e90c9820c7edcc8e61f5e9< 6204bf78b2a903b96ba43afff6abc0b04d6e0462 affected
5293efe62df81908f2e90c9820c7edcc8e61f5e9< a75987714bd2d8e59840667a28e15c1fa5c47554 affected
5293efe62df81908f2e90c9820c7edcc8e61f5e9< 72f2dc8993f10262092745a88cb2dd0fef094f23 affected
5293efe62df81908f2e90c9820c7edcc8e61f5e9< fd1894224407c484f652ad456e1ce423e89bb3eb affected
4.9 affected
< 4.9 unaffected
5.4.212≤ 5.4.* unaffected
… +4 more rows
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I. Basic Information for CVE-2022-49975

Vulnerability Information
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Vulnerability Title
bpf: Don't redirect packets with invalid pkt_len
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Don't redirect packets with invalid pkt_len Syzbot found an issue [1]: fq_codel_drop() try to drop a flow whitout any skbs, that is, the flow->head is null. The root cause, as the [2] says, is because that bpf_prog_test_run_skb() run a bpf prog which redirects empty skbs. So we should determine whether the length of the packet modified by bpf prog or others like bpf_prog_test is valid before forwarding it directly.
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
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于重定向无效pkt_len的数据包，可能导致空流丢弃。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 5293efe62df81908f2e90c9820c7edcc8e61f5e9 ~ 8b68e53d56697a59b5c53893b53f508bbdf272a0 -
Linux Linux 4.9 -

II. Public POCs for CVE-2022-49975

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III. Intelligence Information for CVE-2022-49975

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Same Patch Batch · Linux · 2025-06-18 · 362 CVEs total

CVE-2025-38075 9.8 CRITICAL scsi: target: iscsi: Fix timeout on deleted connection
CVE-2022-50098 8.8 HIGH scsi: qla2xxx: Fix crash due to stale SRB access around I/O timeouts
CVE-2025-38052 8.8 HIGH net/tipc: fix slab-use-after-free Read in tipc_aead_encrypt_done
CVE-2022-49934 8.8 HIGH wifi: mac80211: Fix UAF in ieee80211_scan_rx()
CVE-2022-50164 8.8 HIGH wifi: iwlwifi: mvm: fix double list_add at iwl_mvm_mac_wake_tx_queue
CVE-2025-38016 8.8 HIGH HID: bpf: abort dispatch if device destroyed
CVE-2025-38074 8.8 HIGH vhost-scsi: protect vq->log_used with vq->mutex
CVE-2022-49974 8.8 HIGH HID: nintendo: fix rumble worker null pointer deref
CVE-2022-49968 8.0 HIGH ieee802154/adf7242: defer destroy_workqueue call
CVE-2022-49944 7.8 HIGH Revert "usb: typec: ucsi: add a common function ucsi_unregister_connectors()"
CVE-2022-49952 7.8 HIGH misc: fastrpc: fix memory corruption on probe
CVE-2022-50028 7.8 HIGH gadgetfs: ep_io - wait until IRQ finishes
CVE-2022-49939 7.8 HIGH binder: fix UAF of ref->proc caused by race condition
CVE-2022-49935 7.8 HIGH dma-buf/dma-resv: check if the new fence is really later
CVE-2025-38082 7.8 HIGH gpio: virtuser: fix potential out-of-bound write
CVE-2022-50182 7.8 HIGH media: imx-jpeg: Align upwards buffer size
CVE-2025-38080 7.8 HIGH drm/amd/display: Increase block_sequence array size
CVE-2025-38060 7.8 HIGH bpf: copy_verifier_state() should copy 'loop_entry' field
CVE-2025-38062 7.8 HIGH genirq/msi: Store the IOMMU IOVA directly in msi_desc instead of iommu_cookie
CVE-2022-50101 7.8 HIGH video: fbdev: vt8623fb: Check the size of screen before memset_io()

Showing top 20 of 362 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-49975

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