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CVE-2026-74459— can: etas_es58x: es58x_read_bulk_callback(): fix RX buffer leak on URB resubmit failure

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基金会开源的一个操作系统内核。 Linux kernel 5.15.203版本至5.16之前版本、6.1.167版本至6.2之前版本、6.6.130版本至6.6.151之前版本、6.12.77版本至6.12.103之前版本、6.18.17版本至6.18.44之前版本和6.19.7版本至6.20之前版本存在安全漏洞，该漏洞源于URB重新提交失败时未释放RX缓冲区，可能导致内存泄漏。

AI Predicted 5.3 Difficulty: Hard EPSS 0.17% · P7

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 23

VendorProduct Version RangeStatus
Linux Linux 7a0171b4921ad443fee5ed4fcb9d99fa4776edac< c7ddf119544eea2d8409e12471c3f9f36ca02e3f affected
2185ea6e4ebcb61d1224dc7d187c59723cb5ad59< 21da1a374769751546cc131e58a4d8bd968f57b2 affected
f6e90c113c92e83fc0963d5e60e16b0e8a268981< 0ef136ba052101243ba117a1aca6f4a4c3a81142 affected
b878444519fa03a3edd287d1963cf79ef78be2f1< b85e5c310382803d27adf6fe6554d4208bc8951c affected
18eee279e9b5bff0db1aca9475ae4bc12804f05c< c311f17c261fd375ddf5755f2ebe1f022c19c5b0 affected
5eaad4f768266f1f17e01232ffe2ef009f8129b7< 19c6c8c6cd5dd14fab5fcd744584812a57cbb78d affected
5eaad4f768266f1f17e01232ffe2ef009f8129b7< 7a0cf2b2497c757c3cb1286eddf2986abb0d387b affected
b8f9ca88253574638bcff38900a4c28d570b1919 affected
… +15 more rows
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I. Basic Information for CVE-2026-74459

Vulnerability Information
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Vulnerability Title
can: etas_es58x: es58x_read_bulk_callback(): fix RX buffer leak on URB resubmit failure
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: can: etas_es58x: es58x_read_bulk_callback(): fix RX buffer leak on URB resubmit failure es58x_read_bulk_callback() resubmits the RX URB after processing a received packet. If the resubmit succeeds, the URB remains anchored and will be handled by the normal RX path or by teardown. However, if usb_submit_urb() fails, the callback unanchors the URB and then returns directly. This skips the existing free_urb path, so the coherent transfer buffer allocated with usb_alloc_coherent() is not released. Reuse the existing free_urb path after a resubmit failure so that the RX coherent buffer is freed before leaving the callback.
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基金会开源的一个操作系统内核。 Linux kernel 5.15.203版本至5.16之前版本、6.1.167版本至6.2之前版本、6.6.130版本至6.6.151之前版本、6.12.77版本至6.12.103之前版本、6.18.17版本至6.18.44之前版本和6.19.7版本至6.20之前版本存在安全漏洞，该漏洞源于URB重新提交失败时未释放RX缓冲区，可能导致内存泄漏。
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 7a0171b4921ad443fee5ed4fcb9d99fa4776edac ~ c7ddf119544eea2d8409e12471c3f9f36ca02e3f -
Linux Linux 7.0 -

II. Public POCs for CVE-2026-74459

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III. Intelligence Information for CVE-2026-74459

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Patches & Fixes for CVE-2026-74459 (6)

Same Patch Batch · Linux · 2026-08-15 · 845 CVEs total

CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-72339 9.8 CRITICAL qede: fix off-by-one in BD ring consumption on build_skb failure
CVE-2026-72234 9.8 CRITICAL batman-adv: access unicast_ttvn skb->data only after skb realloc
CVE-2026-74376 9.8 CRITICAL md/raid10: reset read_slot when reusing r10bio for discard
CVE-2026-74255 9.8 CRITICAL tipc: fix UAF in tipc_l2_send_msg()
CVE-2026-72064 9.8 CRITICAL net: mana: Sync page pool RX frags for CPU
CVE-2026-72065 9.8 CRITICAL net: mana: Validate the packet length reported by the NIC
CVE-2026-72217 9.8 CRITICAL SUNRPC: Bound-check xdr_buf_to_bvec() stores before writing
CVE-2026-74473 9.8 CRITICAL vxlan: use pskb_network_may_pull() in route_shortcircuit()
CVE-2026-72323 9.8 CRITICAL ipv4: igmp: Fix potential UAF in igmp_gq_start_timer()
CVE-2026-74495 9.8 CRITICAL igbvf: Fix leak in TX DMA error cleanup
CVE-2026-72463 9.8 CRITICAL xfrm: Fix dev use-after-free in xfrm async resumption
CVE-2026-72069 9.8 CRITICAL locking/rt: Fix the incorrect RCU protection in rt_spin_unlock()

Showing top 20 of 845 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-74459

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