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CVE-2026-72339— qede: fix off-by-one in BD ring consumption on build_skb 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存在安全漏洞，该漏洞源于qede_rx_build_skb()和qede_tpa_rx_build_skb()函数在qede_build_skb()返回NULL时未进行NULL检查，导致BD ring额外消费，可能破坏DMA页引用计数并导致SLUB freelist破坏。

CVSS 9.8 · Critical EPSS 0.76% · P52

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 8a8633978b842c88fbcfe00d4e5dde96048f630e< ecc05d4b20220a09c9c69584fc46ca55248a374a affected
8a8633978b842c88fbcfe00d4e5dde96048f630e< 07be8b8adf91b7ada4c3dacce064d572a6066421 affected
8a8633978b842c88fbcfe00d4e5dde96048f630e< 1624aa100c0b218181aa74e3696a389b509298cb affected
8a8633978b842c88fbcfe00d4e5dde96048f630e< 0bf78df2d3ecb1f4964ff42a7327d25845955153 affected
8a8633978b842c88fbcfe00d4e5dde96048f630e< 814a5edac8c9fc04051808d5faaa93768e989281 affected
8a8633978b842c88fbcfe00d4e5dde96048f630e< b066420e57f3402a52c998678b4678252ac9bb63 affected
8a8633978b842c88fbcfe00d4e5dde96048f630e< 982d6d6bc059c5dff37a2201c2f08c14bcfcbd20 affected
8a8633978b842c88fbcfe00d4e5dde96048f630e< a0a558ca7e75b49e71f8c545c30e8c005e6e4e2f affected
… +10 more rows
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I. Basic Information for CVE-2026-72339

Vulnerability Information
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Vulnerability Title
qede: fix off-by-one in BD ring consumption on build_skb failure
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: qede: fix off-by-one in BD ring consumption on build_skb failure qede_rx_build_skb() and qede_tpa_rx_build_skb() do not check for a NULL return from qede_build_skb(). When it returns NULL under memory pressure, the functions still consume a BD from the ring before returning NULL. The callers then recycle additional BDs, resulting in one extra BD being consumed (off-by-one). This desynchronizes the BD ring, which can corrupt DMA page reference counts and lead to SLUB freelist corruption. Commit 4e910dbe3650 ("qede: confirm skb is allocated before using") added a NULL check inside qede_build_skb() to prevent a NULL pointer dereference, but did not address the missing NULL checks in the callers, making this off-by-one reachable. Fix this by adding NULL checks for the return value of qede_build_skb() in both qede_rx_build_skb() and qede_tpa_rx_build_skb(), returning NULL immediately before any BD ring manipulation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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存在安全漏洞，该漏洞源于qede_rx_build_skb()和qede_tpa_rx_build_skb()函数在qede_build_skb()返回NULL时未进行NULL检查，导致BD ring额外消费，可能破坏DMA页引用计数并导致SLUB freelist破坏。
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 8a8633978b842c88fbcfe00d4e5dde96048f630e ~ ecc05d4b20220a09c9c69584fc46ca55248a374a -
Linux Linux 4.18 -

II. Public POCs for CVE-2026-72339

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III. Intelligence Information for CVE-2026-72339

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Patches & Fixes for CVE-2026-72339 (8)

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

CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
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-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
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-2026-72421 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-2026-72472 9.8 CRITICAL nfs: use nfsi->rwsem to protect traversal of the file lock list
CVE-2026-74428 9.8 CRITICAL rxrpc: Fix double unlock in rxrpc_recvmsg()
CVE-2026-72473 9.8 CRITICAL xprtrdma: Decouple req recycling from RPC completion
CVE-2026-74433 9.8 CRITICAL rxrpc: Fix UAF in rxgk_issue_challenge()
CVE-2026-72098 9.8 CRITICAL dm-verity: fix buffer overflow in FEC calculation
CVE-2026-74434 9.8 CRITICAL rxrpc: Don't move a peeked OOB message onto the pending queue
CVE-2026-72299 9.8 CRITICAL tipc: restrict socket queue dumps in enqueue tracepoints
CVE-2026-72477 9.8 CRITICAL fs/ntfs3: call _ntfs_bad_inode() when failing to rename
CVE-2026-72249 9.8 CRITICAL netfilter: flowtable: use dst in this direction when pushing IPIP header
CVE-2026-72251 9.8 CRITICAL netfilter: nf_nat_sip: reload possible stale data pointer
CVE-2026-72130 9.8 CRITICAL nvmet-auth: reject short AUTH_RECEIVE buffers
CVE-2026-72248 9.8 CRITICAL netfilter: flowtable: support IPIP tunnel with direct xmit

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

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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