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CVE-2026-23007— block: zero non-PI portion of auto integrity buffer

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，该漏洞源于未初始化完整性缓冲区，可能导致信息泄露。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.15% · P4

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux c546d6f438338017480d105ab597292da67f6f6a< d6072557b90e0c557df319a56f4a9dc482706d2c affected
c546d6f438338017480d105ab597292da67f6f6a< ca22c566b89164f6e670af56ecc45f47ef3df819 affected
6.11 affected
< 6.11 unaffected
6.18.7≤ 6.18.* unaffected
6.19≤ * unaffected
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I. Basic Information for CVE-2026-23007

Vulnerability Information
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Vulnerability Title
block: zero non-PI portion of auto integrity buffer
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: block: zero non-PI portion of auto integrity buffer The auto-generated integrity buffer for writes needs to be fully initialized before being passed to the underlying block device, otherwise the uninitialized memory can be read back by userspace or anyone with physical access to the storage device. If protection information is generated, that portion of the integrity buffer is already initialized. The integrity data is also zeroed if PI generation is disabled via sysfs or the PI tuple size is 0. However, this misses the case where PI is generated and the PI tuple size is nonzero, but the metadata size is larger than the PI tuple. In this case, the remainder ("opaque") of the metadata is left uninitialized. Generalize the BLK_INTEGRITY_CSUM_NONE check to cover any case when the metadata is larger than just the PI tuple.
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，该漏洞源于未初始化完整性缓冲区，可能导致信息泄露。
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 c546d6f438338017480d105ab597292da67f6f6a ~ d6072557b90e0c557df319a56f4a9dc482706d2c -
Linux Linux 6.11 -

II. Public POCs for CVE-2026-23007

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III. Intelligence Information for CVE-2026-23007

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Same Patch Batch · Linux · 2026-01-25 · 20 CVEs total

CVE-2025-71162 7.8 HIGH dmaengine: tegra-adma: Fix use-after-free
CVE-2026-23010 7.8 HIGH ipv6: Fix use-after-free in inet6_addr_del().
CVE-2026-22999 7.8 HIGH net/sched: sch_qfq: do not free existing class in qfq_change_class()
CVE-2026-23001 7.8 HIGH macvlan: fix possible UAF in macvlan_forward_source()
CVE-2026-23004 7.8 HIGH dst: fix races in rt6_uncached_list_del() and rt_del_uncached_list()
CVE-2026-23003 7.5 HIGH ip6_tunnel: use skb_vlan_inet_prepare() in __ip6_tnl_rcv()
CVE-2026-22997 7.5 HIGH net: can: j1939: j1939_xtp_rx_rts_session_active(): deactivate session upon receiving the
CVE-2026-22998 7.5 HIGH nvme-tcp: fix NULL pointer dereferences in nvmet_tcp_build_pdu_iovec
CVE-2026-23013 7.0 HIGH net: octeon_ep_vf: fix free_irq dev_id mismatch in IRQ rollback
CVE-2026-23005 x86/fpu: Clear XSTATE_BV[i] in guest XSAVE state whenever XFD[i]=1
CVE-2026-23002 lib/buildid: use __kernel_read() for sleepable context
CVE-2026-23006 ASoC: tlv320adcx140: fix null pointer
CVE-2026-23000 net/mlx5e: Fix crash on profile change rollback failure
CVE-2026-23008 drm/vmwgfx: Fix KMS with 3D on HW version 10
CVE-2026-23009 xhci: sideband: don't dereference freed ring when removing sideband endpoint
CVE-2026-23011 ipv4: ip_gre: make ipgre_header() robust
CVE-2026-22996 net/mlx5e: Don't store mlx5e_priv in mlx5e_dev devlink priv
CVE-2025-71163 dmaengine: idxd: fix device leaks on compat bind and unbind
CVE-2026-23012 mm/damon/core: remove call_control in inactive contexts

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-23007

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