CVE-2024-49884

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2024-10-21. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

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

ext4: fix slab-use-after-free in ext4_split_extent_at()

We hit the following use-after-free:

================================================================== BUG: KASAN: slab-use-after-free in ext4_split_extent_at+0xba8/0xcc0 Read of size 2 at addr ffff88810548ed08 by task kworker/u20:0/40 CPU: 0 PID: 40 Comm: kworker/u20:0 Not tainted 6.9.0-dirty #724 Call Trace: kasan_report+0x93/0xc0 ext4_split_extent_at+0xba8/0xcc0 ext4_split_extent.isra.0+0x18f/0x500 ext4_split_convert_extents+0x275/0x750 ext4_ext_handle_unwritten_extents+0x73e/0x1580 ext4_ext_map_blocks+0xe20/0x2dc0 ext4_map_blocks+0x724/0x1700 ext4_do_writepages+0x12d6/0x2a70 [...]

Allocated by task 40: __kmalloc_noprof+0x1ac/0x480 ext4_find_extent+0xf3b/0x1e70 ext4_ext_map_blocks+0x188/0x2dc0 ext4_map_blocks+0x724/0x1700 ext4_do_writepages+0x12d6/0x2a70 [...]

Freed by task 40: kfree+0xf1/0x2b0 ext4_find_extent+0xa71/0x1e70 ext4_ext_insert_extent+0xa22/0x3260 ext4_split_extent_at+0x3ef/0xcc0 ext4_split_extent.isra.0+0x18f/0x500 ext4_split_convert_extents+0x275/0x750 ext4_ext_handle_unwritten_extents+0x73e/0x1580 ext4_ext_map_blocks+0xe20/0x2dc0 ext4_map_blocks+0x724/0x1700 ext4_do_writepages+0x12d6/0x2a70 [...] ==================================================================

The flow of issue triggering is as follows:

ext4_split_extent_at path = *ppath ext4_ext_insert_extent(ppath) ext4_ext_create_new_leaf(ppath) ext4_find_extent(orig_path) path = *orig_path read_extent_tree_block // return -ENOMEM or -EIO ext4_free_ext_path(path) kfree(path) *orig_path = NULL a. If err is -ENOMEM: ext4_ext_dirty(path + path->p_depth) // path use-after-free !!! b. If err is -EIO and we have EXT_DEBUG defined: ext4_ext_show_leaf(path) eh = path[depth].p_hdr // path also use-after-free !!!

So when trying to zeroout or fix the extent length, call ext4_find_extent() to update the path.

In addition we use *ppath directly as an ext4_ext_show_leaf() input to avoid possible use-after-free when EXT_DEBUG is defined, and to avoid unnecessary path updates.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
19%
KEV
Not listed

Published

October 21, 2024

Last Modified

August 5, 2026

Advisory Details (9)

Auto-updated Aug 4, 2026
No patch confirmed yet.
generic

ext4: fix slab-use-after-free in ext4_split_extent_at() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c26ab35702f8cd0cdc78f96aa5856bfb77be798f
generic

ext4: fix slab-use-after-free in ext4_split_extent_at() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/915ac3630488af0ca194dc63b86d99802b4f6e18
generic

ext4: fix slab-use-after-free in ext4_split_extent_at() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5d949ea75bb529ea6342e83465938a3b0ac51238
generic

ext4: fix slab-use-after-free in ext4_split_extent_at() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8fe117790b37c84c651e2bad9efc0e7fda73c0e3
generic

ext4: fix slab-use-after-free in ext4_split_extent_at() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a5401d4c3e2a3d25643c567d26e6de327774a2c9
generic

ext4: fix slab-use-after-free in ext4_split_extent_at() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/cafcc1bd62934547c76abf46c6d0d54f135006fe
generic

ext4: fix slab-use-after-free in ext4_split_extent_at() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e52f933598b781d291b9297e39c463536da0e185
generic

ext4: fix slab-use-after-free in ext4_split_extent_at() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/448100a29395b0c8b4c42967155849fe0fbe808f
generic

ext4: fix slab-use-after-free in ext4_split_extent_at() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/393a46f60ea4f249dc9d496d4eb2d542f5e11ade

Vendor Advisories for CVE-2024-49884(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(31)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-aws-lts-22.04 (5.15.0.1073.73) @ jammy2026-05-21ubuntu
ubuntulinux-xilinx-zynqmp-tools-host (5.15.0-1039.43) @ jammy2026-05-21ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.127.137~20.04.1) @ focal2026-05-21ubuntu
ubuntulinux-tools-azure-lts-22.04 (5.15.0.1078.76) @ jammy2026-05-21ubuntu
ubuntulinux-tools-intel-iotg (5.15.0.1071.71) @ jammy2026-05-21ubuntu
ubuntulinux-tools-azure-edge (5.15.0.1078.87~20.04.1) @ focal2026-05-21ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.11.0-18.18) @ oracular2026-05-21ubuntu
ubuntulinux-tools-realtime-hwe-24.04-edge (6.11.0-1005.5) @ oracular2026-05-21ubuntu
ubuntulinux-virtual (6.8.0-54.56) @ noble2026-05-21ubuntu
ubuntulinux-tools-aws-lts-20.04 (5.4.0.1142.139) @ focal2026-05-21ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k (6.8.0-1022.25.2) @ noble2026-05-21ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1025.30) @ noble2026-05-21ubuntu
ubuntulinux-tools-raspi (6.8.0-1019.23) @ noble2026-05-21ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1020.21~22.04.1) @ jammy2026-05-21ubuntu
ubuntulinux-tools-ibm-lts-24.04 (6.8.0-1022.22) @ noble2026-05-21ubuntu
ubuntulinux-tools-aws-edge (5.4.0.1142.152~18.04.1) @ bionic2026-05-21ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.127.126) @ jammy2026-05-21ubuntu
ubuntulinux-tools-gkeop-6.8 (6.8.0-1006.8) @ noble2026-05-21ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1023.25) @ noble2026-05-21ubuntu
ubuntulinux-tools-oem-24.04b (6.11.0-1015.15) @ noble2026-05-21ubuntu
ubuntulinux-virtual-hwe-18.04-edge (5.4.0.211.206) @ focal2026-05-21ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-57.59~22.04.1) @ jammy2026-05-21ubuntu
ubuntulinux-tools-fips (5.4.0.1116.113) @ focal2026-05-21ubuntu
ubuntulinux-tools-gcp-fips (5.4.0.1145.87) @ focal2026-05-21ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.4.0-1060 (5.4.0-1060.64) @ focal2026-05-21ubuntu
ubuntulinux-tools-azure-edge (6.8.0-1025.30~22.04.1) @ jammy2026-05-21ubuntu
ubuntulinux-tools-aws-fips (5.4.0.1142.89) @ focal2026-05-21ubuntu
ubuntulinux-tools-azure-nvidia (6.8.0-1014.15) @ noble2026-05-21ubuntu
ubuntulinux-tools-iot (5.4.0.1048.46) @ focal2026-05-21ubuntu
redhatkernel-0:5.14.0-570.12.1.el9_62025-05-13redhat
linuxKernel @ 4.19.323—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.

Additional Vendor Advisories

(24)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 13× in last 7d / 51× 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 144 total refreshes for this CVE.

  1. 2026-08-07 16:25 UTCEPSS rescore
  2. 2026-08-06 13:45 UTCEPSS rescore
  3. 2026-08-05 19:16 UTCEPSS rescore
  4. 2026-08-05 11:57 UTCEG score recompute
  5. 2026-08-05 11:57 UTCVendor advisory
  6. 2026-08-05 11:57 UTCGHSA enrichment
  7. 2026-08-04 15:08 UTCEPSS rescore
  8. 2026-08-04 11:45 UTCEG score recompute
  9. 2026-08-04 11:45 UTCVendor advisory
  10. 2026-08-04 11:45 UTCGHSA enrichment
  11. 2026-08-04 10:36 UTCEPSS rescore
  12. 2026-08-03 10:34 UTCEPSS rescore
  13. 2026-08-02 02:25 UTCEPSS rescore
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  18. 2026-07-28 15:35 UTCEPSS rescore
  19. 2026-07-28 09:25 UTCOSV refresh
  20. 2026-07-27 14:11 UTCEPSS rescore
  21. 2026-07-26 14:53 UTCEPSS rescore
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  23. 2026-07-25 14:17 UTCEPSS rescore
  24. 2026-07-25 14:16 UTCEPSS rescore
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  1. 2026-07-23 14:17 UTCEPSS rescore
  2. 2026-07-23 14:17 UTCEPSS rescore
  3. 2026-07-23 02:42 UTCEG score recompute
  4. 2026-07-22 14:07 UTCEPSS rescore
  5. 2026-07-22 14:07 UTCEPSS rescore
  6. 2026-07-21 15:23 UTCEPSS rescore
  7. 2026-07-20 17:06 UTCEPSS rescore
  8. 2026-07-19 14:30 UTCEPSS rescore
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  10. 2026-07-19 02:28 UTCEPSS rescore
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  12. 2026-07-18 10:03 UTCEPSS rescore
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  14. 2026-07-16 17:02 UTCEPSS rescore
  15. 2026-07-15 16:57 UTCEPSS rescore
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  19. 2026-07-13 22:29 UTCEPSS rescore
  20. 2026-07-13 06:12 UTCEPSS rescore
  21. 2026-07-12 05:45 UTCEPSS rescore
  22. 2026-07-12 05:45 UTCEPSS rescore
  23. 2026-07-11 08:26 UTCEPSS rescore
  24. 2026-07-11 01:22 UTCOSV refresh
  25. 2026-07-09 19:09 UTCEPSS rescore
  26. 2026-07-09 19:09 UTCEPSS rescore
  27. 2026-07-08 15:14 UTCEPSS rescore
  28. 2026-07-07 13:45 UTCEPSS rescore
  29. 2026-07-06 16:26 UTCEPSS rescore
  30. 2026-07-06 02:22 UTCEPSS rescore
  31. 2026-07-05 02:29 UTCEPSS rescore
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  41. 2026-06-25 13:49 UTCEPSS rescore
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  44. 2026-06-23 21:32 UTCEPSS rescore
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  46. 2026-06-22 14:25 UTCEPSS rescore
  47. 2026-06-22 14:25 UTCEPSS rescore
  48. 2026-06-22 08:32 UTCOSV refresh
  49. 2026-06-21 14:56 UTCEPSS rescore
  50. 2026-06-21 01:59 UTCEPSS rescore
  51. 2026-06-21 01:58 UTCEPSS rescore
  52. 2026-06-19 19:25 UTCEPSS rescore
  53. 2026-06-18 17:52 UTCEPSS rescore
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  73. 2026-06-06 13:46 UTCEPSS rescore
  74. 2026-06-06 13:46 UTCEPSS rescore
  75. 2026-06-05 22:46 UTCEPSS rescore

Frequently asked(5)

What is CVE-2024-49884?
CVE-2024-49884 is a high vulnerability published on October 21, 2024. In the Linux kernel, the following vulnerability has been resolved: ext4: fix slab-use-after-free in ext4splitextent_at() We hit the following use-after-free: ================================================================== BUG: KASAN: slab-use-after-free in ext4splitextent_at+0xba8/0xcc0 Read of…
When was CVE-2024-49884 disclosed?
CVE-2024-49884 was first published in the National Vulnerability Database on October 21, 2024, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-49884 actively exploited?
CVE-2024-49884 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 81.3% of all scored CVEs.
What is the CVSS score of CVE-2024-49884?
CVE-2024-49884 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2024-49884?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-49884, 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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