CVE-2026-53247— net: ethernet: mtk_eth_soc: Fix use-after-free in metadata dst teardown
Possible ATT&CK Techniques 1AI
T1564.008 · Email Hiding RulesAffected Version Matrix 12
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 2d7605a729062bb554f03c5983d8cfb8c0b42e9c< 72775977e89c25c99ee84d2c5baa3f86a8ba5cb4 | affected |
2d7605a729062bb554f03c5983d8cfb8c0b42e9c< 459c6f35c58cf0fd5247e55d73ddaa29571d9b7e | affected | ||
2d7605a729062bb554f03c5983d8cfb8c0b42e9c< e634408d2b0cd939cfe019398a21fb47b7a8ffe3 | affected | ||
2d7605a729062bb554f03c5983d8cfb8c0b42e9c< 2d86aeb46d5f69c704065a8c69822582787272a1 | affected | ||
2d7605a729062bb554f03c5983d8cfb8c0b42e9c< 80df409e1a483676826a6c66e693dba6ac507751 | affected | ||
6.2 | affected | ||
< 6.2 | unaffected | ||
6.6.143≤ 6.6.* | unaffected | ||
| … +4 more rows | |||
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I. Basic Information for CVE-2026-53247
Vulnerability Information
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Vulnerability Title
net: ethernet: mtk_eth_soc: Fix use-after-free in metadata dst teardown
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: ethernet: mtk_eth_soc: Fix use-after-free in metadata dst teardown mtk_free_dev() calls metadata_dst_free() which frees the metadata_dst with kfree() immediately, bypassing the RCU grace period. In the RX path, skb_dst_set_noref() sets a non-refcounted pointer from the skb to the metadata_dst. This function requires RCU read-side protection and the dst must remain valid until all RCU readers complete. Since metadata_dst_free() calls kfree() directly, a use-after-free can occur if any skb still holds a noref pointer to the dst when the driver tears it down. Replace metadata_dst_free() with dst_release() which properly goes through the refcount path: when the refcount drops to zero, it schedules the actual free via call_rcu_hurry(), ensuring all RCU readers have completed before the memory is freed.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-53247
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-53247 (5)
Same Patch Batch · Linux · 2026-06-25 · 147 CVEs total
| CVE-2026-53175 | 9.8 CRITICAL | inet: frags: fix use-after-free caused by the fqdir_pre_exit() flush |
| CVE-2026-53260 | 9.8 CRITICAL | tcp: Add preempt_{disable,enable}_nested() in reqsk_queue_hash_req(). |
| CVE-2026-53221 | 9.8 CRITICAL | ip6_vti: fix incorrect tunnel matching in vti6_tnl_lookup() |
| CVE-2026-53228 | 9.8 CRITICAL | ipv6: sit: reload inner IPv6 header after GSO offloads |
| CVE-2026-53216 | 9.8 CRITICAL | net: mvpp2: limit XDP frame size to the RX buffer |
| CVE-2026-53151 | 9.8 CRITICAL | rxrpc: Fix the ACK parser to extract the SACK table for parsing |
| CVE-2026-53176 | 9.8 CRITICAL | IB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN |
| CVE-2026-53215 | 9.8 CRITICAL | net: mvpp2: refill RX buffers before XDP or skb use |
| CVE-2026-53246 | 9.8 CRITICAL | sctp: validate cached peer INIT chunk length in COOKIE_ECHO processing |
| CVE-2026-53131 | 9.4 CRITICAL | netfilter: require Ethernet MAC header before using eth_hdr() |
| CVE-2026-53225 | 9.1 CRITICAL | sctp: fix uninit-value in __sctp_rcv_asconf_lookup() |
| CVE-2026-53186 | 9.1 CRITICAL | RDMA/srp: bound SRP_RSP sense copy by the received length |
| CVE-2026-53224 | 9.1 CRITICAL | sctp: validate embedded INIT chunk and address list lengths in cookie |
| CVE-2026-53200 | 8.8 HIGH | KVM: arm64: nv: Fix handling of XN[0] when !FEAT_XNX |
| CVE-2026-53277 | 8.8 HIGH | KVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation |
| CVE-2026-53232 | 8.8 HIGH | net: phy: clean the sfp upstream if phy probing fails |
| CVE-2026-53248 | 8.8 HIGH | net: airoha: Fix use-after-free in metadata dst teardown |
| CVE-2026-53198 | 8.8 HIGH | ksmbd: fix use-after-free of a deferred file_lock on double SMB2_CANCEL |
| CVE-2026-53240 | 8.8 HIGH | xfrm: iptfs: fix use-after-free on first_skb in __input_process_payload |
| CVE-2026-53188 | 8.8 HIGH | RDMA/core: Validate the passed in fops for ib_get_ucaps() |
Showing top 20 of 147 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-53358
Bluetooth: L2CAP: use chan timer to close channels in cleanu - CVE-2026-53357
Bluetooth: fix UAF in l2cap_sock_cleanup_listen() vs l2cap_c - CVE-2026-53356
drm/i915/gem: Fix phys BO pread/pwrite with offset - CVE-2026-53355
net: rds: clear i_sends on setup unwind - CVE-2026-53354
arm64: errata: Mitigate TLBI errata on various Arm CPUs
Same vendor: Linux
- CVE-2026-53358
Bluetooth: L2CAP: use chan timer to close channels in cleanu - CVE-2026-53357
Bluetooth: fix UAF in l2cap_sock_cleanup_listen() vs l2cap_c - CVE-2026-53356
drm/i915/gem: Fix phys BO pread/pwrite with offset - CVE-2026-53355
net: rds: clear i_sends on setup unwind - CVE-2026-53354
arm64: errata: Mitigate TLBI errata on various Arm CPUs
V. Comments for CVE-2026-53247
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