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CVE-2026-99087— dm-integrity: fix NULL pointer dereference when the 'R' flag is used

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.

在 Linux 内核中，以下漏洞已得到修复： dm-integrity：修复在使用 'R' 标志时引发的空指针解引用问题。 如果 dm-integrity 设备设置了 SB_FLAG_DIRTY_BITMAP 标志，且用户以 'R' 模式激活该设备，则会在 dm_integrity_resume 函数中发生崩溃。原因是该函数试图读取包含位图的日志，但在 'R' 模式下该操作并不适用。 此补丁修改了 dm-integrity 的行为：当设备以 'R' 模式激活时，在 dm_integrity_resume 函数中跳过

AI Predicted 7.8 Difficulty: Moderate

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux 468dfca38b1a6fbdccd195d875599cb7c8875cd9< 2e25842f0e4423e0efb243f56153d842ed6b933f affected
468dfca38b1a6fbdccd195d875599cb7c8875cd9< 69ed43ed8a174465fca1ba6bfbde53e4618c8956 affected
468dfca38b1a6fbdccd195d875599cb7c8875cd9< 7d4d4f3b668d708d94f62ecdd33ac330a6fd8a84 affected
5.2 affected
< 5.2 unaffected
6.18.58≤ 6.18.* unaffected
7.2.12≤ 7.2.* unaffected
7.3≤ * unaffected
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I. Basic Information for CVE-2026-99087

Vulnerability Information
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Vulnerability Title
dm-integrity: fix NULL pointer dereference when the 'R' flag is used
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: dm-integrity: fix NULL pointer dereference when the 'R' flag is used If the dm-integrity device has the SB_FLAG_DIRTY_BITMAP flag set and the user activates the device in the 'R' mode, a crash in dm_integrity_resume happens because the function attempts to read the journal containing the bitmap. This patch makes dm-integrity skip any writes to the device in dm_integrity_resume if the device is activated in the 'R' mode.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 468dfca38b1a6fbdccd195d875599cb7c8875cd9 ~ 2e25842f0e4423e0efb243f56153d842ed6b933f -
Linux Linux 5.2 -

II. Public POCs for CVE-2026-99087

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III. Intelligence Information for CVE-2026-99087

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Patches & Fixes for CVE-2026-99087 (3)

Same Patch Batch · Linux · 2026-10-23 · 218 CVEs total

CVE-2026-98937 perf/core: Check kernel access when kernel callchains are requested
CVE-2026-98950 flow_dissector: avoid u16 truncation of hlen in bpf_flow_dissect()
CVE-2026-98949 drm/imagination: Fix reference and vm_bo handling in remap()
CVE-2026-98948 mlxsw: spectrum_flower: Fix port range register leak in tmplt_create()
CVE-2026-98947 vsock: Fix memory leak in vmci_transport_recv_dgram_cb()
CVE-2026-98946 drm/vc4: Disable the V3D interrupt across runtime suspend
CVE-2026-98945 HID: steam: Rearrange teardown sequence
CVE-2026-98944 HID: steam: Refactor registration
CVE-2026-98943 HID: steam: Clean up locking
CVE-2026-98942 sched_ext: Build the cid tables privately and publish them with RCU
CVE-2026-98941 ext4: don't enable large folios on encrypted inodes
CVE-2026-98940 ASoC: qcom: lpass-cpu: use DAI table index for playback constraints
CVE-2026-98939 x86/mm: Drop unnecessary PMD page copy when freeing
CVE-2026-98938 rust: irq: pass RegistrationInner as cookie to request_irq
CVE-2026-98926 drm/amd/display: Remove sink usage from DPMS
CVE-2026-98929 macsec: initialize SecY before registering the netdevice
CVE-2026-98928 KVM: arm64: Derive GUEST_HAS_SVE from the SVE feature bit at EL2
CVE-2026-98927 KVM: arm64: nv: Fix life cycle of the nested_mmus array
CVE-2026-98930 KVM: s390: Fix IRQ injection with SIGP Stop and Store Status
CVE-2026-98925 bpf, sockmap: Fix self-redirect copied_seq double-counting

Showing top 20 of 218 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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