CVE-2024-35849

HIGHNVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2024-05-17. NVD baseline CVSS 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.1Exploit: NoneExposed: 0

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

btrfs: fix information leak in btrfs_ioctl_logical_to_ino()

Syzbot reported the following information leak for in btrfs_ioctl_logical_to_ino():

BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_user+0xbc/0x110 lib/usercopy.c:40 instrument_copy_to_user include/linux/instrumented.h:114 [inline] _copy_to_user+0xbc/0x110 lib/usercopy.c:40 copy_to_user include/linux/uaccess.h:191 [inline] btrfs_ioctl_logical_to_ino+0x440/0x750 fs/btrfs/ioctl.c:3499 btrfs_ioctl+0x714/0x1260 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl+0x261/0x450 fs/ioctl.c:890 __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:890 x64_sys_call+0x1883/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at: __kmalloc_large_node+0x231/0x370 mm/slub.c:3921 __do_kmalloc_node mm/slub.c:3954 [inline] __kmalloc_node+0xb07/0x1060 mm/slub.c:3973 kmalloc_node include/linux/slab.h:648 [inline] kvmalloc_node+0xc0/0x2d0 mm/util.c:634 kvmalloc include/linux/slab.h:766 [inline] init_data_container+0x49/0x1e0 fs/btrfs/backref.c:2779 btrfs_ioctl_logical_to_ino+0x17c/0x750 fs/btrfs/ioctl.c:3480 btrfs_ioctl+0x714/0x1260 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl+0x261/0x450 fs/ioctl.c:890 __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:890 x64_sys_call+0x1883/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Bytes 40-65535 of 65536 are uninitialized Memory access of size 65536 starts at ffff888045a40000

This happens, because we're copying a 'struct btrfs_data_container' back to user-space. This btrfs_data_container is allocated in 'init_data_container()' via kvmalloc(), which does not zero-fill the memory.

Fix this by using kvzalloc() which zeroes out the memory on allocation.

CVSS v3
7.1
EG Score
7.1(medium)
EG Risk
32(Track)
EG Risk 32/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity71% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
17.2%
KEV
Not listed

Published

May 17, 2024

Last Modified

May 12, 2026

References (19)

Patch Availability(28)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-18.04-edge (5.4.0.189.187) @ focal2026-05-22ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.116.116) @ jammy2026-05-22ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1063.69~20.04.1) @ focal2026-05-22ubuntu
ubuntulinux-virtual-hwe-18.04-edge (5.4.0.189.209~18.04.1) @ bionic2026-05-22ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.4.0-1047 (5.4.0-1047.51) @ focal2026-05-22ubuntu
ubuntulinux-virtual-lts-xenial (4.4.0.273.279) @ xenial2026-05-22ubuntu
ubuntulinux-tools-azure-fips-4.15 (4.15.0.2102.98) @ bionic2026-05-22ubuntu
ubuntulinux-tools-kvm (4.15.0.1168.159) @ bionic2026-05-22ubuntu
ubuntulinux-xilinx-zynqmp-tools-host (5.15.0-1035.39) @ jammy2026-05-22ubuntu
ubuntulinux-tools-raspi2-hwe-18.04-edge (5.4.0.1112.142) @ focal2026-05-22ubuntu
ubuntulinux-tools-iot (5.4.0.1040.38) @ focal2026-05-22ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1058.56) @ jammy2026-05-22ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1065.73~20.04.1) @ focal2026-05-22ubuntu
ubuntulinux-tools-raspi (6.8.0-1009.10) @ noble2026-05-22ubuntu
ubuntulinux-tools-nvidia-hwe-22.04-edge (6.8.0-1011.11~22.04.1) @ jammy2026-05-22ubuntu
ubuntulinux-tools-oem-24.04a (6.8.0-1010.10) @ noble2026-05-22ubuntu
ubuntulinux-tools-aws-lts-22.04 (5.15.0.1065.65) @ jammy2026-05-22ubuntu
ubuntulinux-tools-aws-edge (5.15.0.1065.71~20.04.1) @ focal2026-05-22ubuntu
ubuntulinux-tools-azure-fde-edge (5.15.0.1068.77~20.04.1.45) @ focal2026-05-22ubuntu
ubuntulinux-virtual-hwe-16.04-edge (4.15.0.242.254~16.04.1) @ xenial2026-05-22ubuntu
ubuntulinux-tools-oracle-64k (6.8.0-1010.10) @ noble2026-05-22ubuntu
ubuntulinux-virtual-lts-xenial (4.4.0.273.307~14.04.1) @ trusty2026-05-22ubuntu
ubuntulinux-tools-azure (4.15.0.1193.208~14.04.1) @ trusty2026-05-22ubuntu
ubuntulinux-tools-aws (4.4.0.1186.190) @ xenial2026-05-22ubuntu
ubuntulinux-tools-fips (4.4.0.1119.120) @ xenial2026-05-22ubuntu
ubuntulinux-tools-oracle (4.15.0.1148.159~16.04.1) @ xenial2026-05-22ubuntu
ubuntulinux-tools-gcp-fips-4.15 (4.15.0.2086.84) @ bionic2026-05-22ubuntu
linuxKernel @ 4.19.313—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(25)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 13× in last 7d / 48× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 124 total refreshes for this CVE.

  1. 2026-07-23 14:17 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2024-35849?
CVE-2024-35849 is a high vulnerability published on May 17, 2024. In the Linux kernel, the following vulnerability has been resolved: btrfs: fix information leak in btrfsioctllogicaltoino() Syzbot reported the following information leak for in btrfsioctllogicaltoino(): BUG: KMSAN: kernel-infoleak in instrumentcopyto_user include/linux/instrumented.h:114 [inline]…
When was CVE-2024-35849 disclosed?
CVE-2024-35849 was first published in the National Vulnerability Database on May 17, 2024, with the most recent update on May 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-35849 actively exploited?
CVE-2024-35849 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 17.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2024-35849?
CVE-2024-35849 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2024-35849?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-35849, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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