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CVE Record

CVE-2024-41000: block/ioctl: prefer different overflow check

In the Linux kernel, the following vulnerability has been resolved: block/ioctl: prefer different overflow check Running syzkaller with the newly reintroduced signed integer overflow sanitizer shows this report: [ 62.982337] ------------[ cut here ]------------ [ 62.985692] cgroup: Invalid name [ 62.986211] UBSAN: signed-integer-overflow in ../block/ioctl.c:36:46 [ 62.989370] 9pnet_fd: p9_fd_create_tcp (7343): problem connecting socket to 127.0.0.1 [ 62.992992] 9223372036854775807 + 4095 cannot be represented in type 'long long' [ 62.997827] 9pnet_fd: p9_fd_create_tcp (7345): problem connecting socket to 127.0.0.1 [ 62.999369] random: crng reseeded on system resumption [ 63.000634] GUP no longer grows the stack in syz-executor.2 (7353): 20002000-20003000 (20001000) [ 63.000668] CPU: 0 PID: 7353 Comm: syz-executor.2 Not tainted 6.8.0-rc2-00035-gb3ef86b5a957 #1 [ 63.000677] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 63.000682] Call Trace: [ 63.000686] <TASK> [ 63.000731] dump_stack_lvl+0x93/0xd0 [ 63.000919] __get_user_pages+0x903/0xd30 [ 63.001030] __gup_longterm_locked+0x153e/0x1ba0 [ 63.001041] ? _raw_read_unlock_irqrestore+0x17/0x50 [ 63.001072] ? try_get_folio+0x29c/0x2d0 [ 63.001083] internal_get_user_pages_fast+0x1119/0x1530 [ 63.001109] iov_iter_extract_pages+0x23b/0x580 [ 63.001206] bio_iov_iter_get_pages+0x4de/0x1220 [ 63.001235] iomap_dio_bio_iter+0x9b6/0x1410 [ 63.001297] __iomap_dio_rw+0xab4/0x1810 [ 63.001316] iomap_dio_rw+0x45/0xa0 [ 63.001328] ext4_file_write_iter+0xdde/0x1390 [ 63.001372] vfs_write+0x599/0xbd0 [ 63.001394] ksys_write+0xc8/0x190 [ 63.001403] do_syscall_64+0xd4/0x1b0 [ 63.001421] ? arch_exit_to_user_mode_prepare+0x3a/0x60 [ 63.001479] entry_SYSCALL_64_after_hwframe+0x6f/0x77 [ 63.001535] RIP: 0033:0x7f7fd3ebf539 [ 63.001551] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 14 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 63.001562] RSP: 002b:00007f7fd32570c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 63.001584] RAX: ffffffffffffffda RBX: 00007f7fd3ff3f80 RCX: 00007f7fd3ebf539 [ 63.001590] RDX: 4db6d1e4f7e43360 RSI: 0000000020000000 RDI: 0000000000000004 [ 63.001595] RBP: 00007f7fd3f1e496 R08: 0000000000000000 R09: 0000000000000000 [ 63.001599] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 63.001604] R13: 0000000000000006 R14: 00007f7fd3ff3f80 R15: 00007ffd415ad2b8 ... [ 63.018142] ---[ end trace ]--- Historically, the signed integer overflow sanitizer did not work in the kernel due to its interaction with `-fwrapv` but this has since been changed [1] in the newest version of Clang; It was re-enabled in the kernel with Commit 557f8c582a9ba8ab ("ubsan: Reintroduce signed overflow sanitizer"). Let's rework this overflow checking logic to not actually perform an overflow during the check itself, thus avoiding the UBSAN splat. [1]: https://github.com/llvm/llvm-project/pull/82432

UnknownCVSS not scoredNot KEV-listedUpdated
Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2024-41000 is a Linux kernel bug in block device ioctl overflow checking. The public record describes a sanitizer-detected signed integer overflow found by syzkaller and fixed in stable kernel commits. Business impact is not clearly stated in the sources, so treat it as a kernel hygiene and patch-management item rather than confirmed active exploitation.

Executive priority

Handle through normal kernel update governance unless a vendor advisory for a critical asset raises priority. There is no source-backed active exploitation signal, but kernel flaws can have broad operational reach and should not be left unmanaged.

Technical view

The issue is in Linux kernel block/ioctl.c overflow-check logic. The old check could itself trigger signed integer overflow under extreme values, producing a UBSAN report. Kernel maintainers reworked the check to avoid performing the overflowing addition. The bundle provides no CVSS, CWE, CPEs, exploitability assessment, or demonstrated security impact.

Likely exposure

Potential exposure is Linux systems running affected kernel versions or downstream products whose vendors flag this CVE. The source bundle lists Linux kernel version data and downstream Debian LTS and Siemens advisories, but affected-version evidence is not complete enough to infer every exposed distribution or appliance.

Exploitation context

The bundle says KEV is false and provides no cited evidence of active exploitation. The triggering evidence is syzkaller fuzzing with UBSAN, not a public exploit. Do not assume remote exploitation, privilege escalation, or denial of service without vendor impact guidance.

Researcher notes

Evidence is limited to the kernel fix description, stable commit references, and downstream advisories. The record lacks CVSS, CWE, CPEs, and impact detail. Validation should focus on version mapping and vendor advisories, not exploit reproduction.

Mitigation direction

  • Review Linux kernel vendor advisories for CVE-2024-41000 applicability.
  • Update to vendor kernel builds containing the referenced stable fixes.
  • Prioritize downstream products named in Debian LTS or Siemens advisories.
  • Avoid direct wrangler-style bypasses of vendor update channels for appliances.
  • Track vendor guidance because no standalone workaround is provided.

Validation and detection

  • Inventory Linux kernel versions across servers, appliances, and containers hosts.
  • Map installed kernels to vendor advisories and fixed package releases.
  • Confirm whether Debian LTS advisories apply to maintained assets.
  • Check Siemens advisories for affected product-specific firmware or OS guidance.
  • Verify updated systems boot into the remediated kernel.
Prepared
Confidence
medium
Sources
12

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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cve · low confidence lookup

CVE-2024-41000 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
3ADP providers
11Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
other:ssvc
siemens-SADPADP container
Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux8f6dfa1f1efe6dcca2d43e575491d8fcbe922f62, 5010c27120962c85d2f421d2cf211791c9603503, ef31cc87794731ffcb578a195a2c47d744e25fb8, cb16cc1abda18a9514106d2ac8c8d7abc0be5ed8, 6f64f866aa1ae6975c95d805ed51d7e9433a0016, 6f64f866aa1ae6975c95d805ed51d7e9433a0016, bcdc288e7bc008daf38ef0401b53e4a8bb61bbe5, 5.10.215, 5.15.148, 6.1.75, 6.6.14, 6.7.2unaffected
LinuxLinux6.8, 0, 5.10.221, 5.15.162, 6.1.96, 6.6.36, 6.9.7, 6.10affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.