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CVE-2026-64222— octeontx2-pf: avoid double free of pool->stack on AQ init 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基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于otx2_pool_aq_init()函数在mailbox同步或重试分配失败时释放pool->stack后未将指针置空，导致后续清理函数再次释放同一内存，造成双重释放，可能导致系统崩溃或任意代码执行。

CVSS 7.0 · High EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1079

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux caa2da34fd25a37e9fd43343b6966fb9d730a6d5< e6e9bc0bf963662b7042048ab0281014625d4cb4 affected
caa2da34fd25a37e9fd43343b6966fb9d730a6d5< b92e7ea408b6f1144648909c9c49a55d245d7300 affected
caa2da34fd25a37e9fd43343b6966fb9d730a6d5< 94192b0579333c3deee2441379aab8ca98fc2e6b affected
caa2da34fd25a37e9fd43343b6966fb9d730a6d5< 4c29603498b05c049dbbbc47e882f2fbf0193cd7 affected
caa2da34fd25a37e9fd43343b6966fb9d730a6d5< 0488a0bb344fb1992853b60082acff6be8164d74 affected
caa2da34fd25a37e9fd43343b6966fb9d730a6d5< 0d9b9d7dbef976ae7f855b6358f1d703014e96ea affected
caa2da34fd25a37e9fd43343b6966fb9d730a6d5< c4b8c5d51632538b19ee01cf6d70cbceeefbd3ec affected
caa2da34fd25a37e9fd43343b6966fb9d730a6d5< 9b244c242bec48b37e82b89787afd6a4c43457e1 affected
… +10 more rows
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I. Basic Information for CVE-2026-64222

Vulnerability Information
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Vulnerability Title
octeontx2-pf: avoid double free of pool->stack on AQ init failure
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: octeontx2-pf: avoid double free of pool->stack on AQ init failure otx2_pool_aq_init() frees pool->stack when mailbox sync or retry allocation fails, but leaves the pointer unchanged. Later, otx2_sq_aura_pool_init() unwinds the partial setup through otx2_aura_pool_free(), which frees pool->stack again. The CN20K-specific cn20k_pool_aq_init() implementation has the same bug in its corresponding error path. Set pool->stack to NULL immediately after the local free so the shared cleanup path does not free the same stack again while cleaning up partially initialized pool state. The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in v7.1-rc3. Runtime validation was not performed because reproducing this path requires OcteonTX2/CN20K hardware.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/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基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于otx2_pool_aq_init()函数在mailbox同步或重试分配失败时释放pool->stack后未将指针置空，导致后续清理函数再次释放同一内存，造成双重释放，可能导致系统崩溃或任意代码执行。
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 caa2da34fd25a37e9fd43343b6966fb9d730a6d5 ~ e6e9bc0bf963662b7042048ab0281014625d4cb4 -
Linux Linux 5.6 -

II. Public POCs for CVE-2026-64222

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III. Intelligence Information for CVE-2026-64222

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Patches & Fixes for CVE-2026-64222 (7)

Same Patch Batch · Linux · 2026-07-24 · 48 CVEs total

CVE-2026-64232 9.8 CRITICAL block: recompute nr_integrity_segments in blk_insert_cloned_request
CVE-2026-64216 9.8 CRITICAL netfs: Fix potential UAF in netfs_unlock_abandoned_read_pages()
CVE-2026-64255 8.8 HIGH wifi: iwlwifi: mld: validate sta_mask before ffs() in BA session handlers
CVE-2026-64247 8.4 HIGH KVM: x86: hyper-v: Bound the bank index when querying sparse banks
CVE-2026-64235 8.1 HIGH x86/ftrace: Relocate %rip-relative percpu refs in dynamic trampolines
CVE-2026-64223 8.1 HIGH wifi: mac80211: consume only present negotiated TTLM maps
CVE-2026-64226 7.8 HIGH sched_ext: Avoid UAF in scx_root_enable_workfn() init failure path
CVE-2026-64221 7.8 HIGH spi: ti-qspi: fix use-after-free after DMA setup failure
CVE-2026-64218 7.8 HIGH batman-adv: bla: fix report_work leak on backbone_gw purge
CVE-2026-64251 7.8 HIGH pwrseq: core: fix use-after-free in pwrseq_debugfs_seq_next()
CVE-2026-64217 7.8 HIGH netfs: Fix overrun check in netfs_extract_user_iter()
CVE-2026-64208 7.5 HIGH crypto/krb5, rxrpc: Fix lack of pre-decrypt/pre-verify length checks
CVE-2026-64210 7.5 HIGH net/mlx5e: xsk: Fix unlocked writing to ICOSQ
CVE-2026-64243 7.1 HIGH ASoC: codecs: simple-mux: Fix enum control bounds check
CVE-2026-64219 7.0 HIGH drm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_as
CVE-2026-64250 LoongArch: Report dying CPU to RCU in stop_this_cpu()
CVE-2026-64252 MIPS: DEC: Prevent initial console buffer from landing in XKPHYS
CVE-2026-64249 fpga: region: fix use-after-free in child_regions_with_firmware()
CVE-2026-64246 power: reset: linkstation-poweroff: fix use-after-free in the linkstation_poweroff_init()
CVE-2026-64224 octeontx2-pf: fix double free in rvu_rep_rsrc_init()

Showing top 20 of 48 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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