5.5

CVE-2021-47117: linux

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2021-47117DEBIAN-CVE-2021-47117
Published 15-03-2024Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2021-47117 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.4% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.24%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 7 · Related 8
SUSE-SU-2024:1454-1SUSE-SU-2024:1465-1SUSE-SU-2024:1489-1SUSE-SU-2024:1643-1SUSE-SU-2024:1646-1SUSE-SU-2024:1870-1

Timeline

  1. 15-03-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ext4: fix bug on in ext4_es_cache_extent as ext4_split_extent_at failed We got follow bug_on when run fsstress with injecting IO fault: [130747.323114] kernel BUG at fs/ext4/extents_status.c:762! [130747.323117] Internal error: Oops - BUG: 0 [#1] SMP ...... [130747.334329] Call trace: [130747.334553] ext4_es_cache_extent+0x150/0x168 [ext4] [130747.334975] ext4_cache_extents+0x64/0xe8 [ext4] [130747.335368] ext4_find_extent+0x300/0x330 [ext4] [130747.335759] ext4_ext_map_blocks+0x74/0x1178 [ext4] [130747.336179] ext4_map_blocks+0x2f4/0x5f0 [ext4] [130747.336567] ext4_mpage_readpages+0x4a8/0x7a8 [ext4] [130747.336995] ext4_readpage+0x54/0x100 [ext4] [130747.337359] generic_file_buffered_read+0x410/0xae8 [130747.337767] generic_file_read_iter+0x114/0x190 [130747.338152] ext4_file_read_iter+0x5c/0x140 [ext4] [130747.338556] __vfs_read+0x11c/0x188 [130747.338851] vfs_read+0x94/0x150 [130747.339110] ksys_read+0x74/0xf0 This patch's modification is according to Jan Kara's suggestion in: https://patchwork.ozlabs.org/project/linux-ext4/patch/20210428085158.3728201-1-yebin10@huawei.com/ "I see. Now I understand your patch. Honestly, seeing how fragile is trying to fix extent tree after split has failed in the middle, I would probably go even further and make sure we fix the tree properly in case of ENOSPC and EDQUOT (those are easily user triggerable). Anything else indicates a HW problem or fs corruption so I'd rather leave the extent tree as is and don't try to fix it (which also means we will not create overlapping extents)."

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

14%

Versus all other CVEs

30-day change

0.00 pp

From 0.24% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.24%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu87 products
  • linuxAll versions (No fix recorded) | < 4.4.0-283.317 | < 4.15.0-154.161 | < 5.4.0-81.91
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.4.0-1156.162 | < 4.4.0-1194.209 | < 4.15.0-1110.117 | < 5.4.0-1055.58
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ adb2355104b2109e06ba5276485d187d023b2fd2, < e33bafad30d34cfa5e9787cb099cab05e2677fcb | ≥ adb2355104b2109e06ba5276485d187d023b2fd2, < 5b3a9a2be59478b013a430ac57b0f3d65471b071 | ≥ adb2355104b2109e06ba5276485d187d023b2fd2, < d8116743ef5432336289256b2f7c117299213eb9 | ≥ adb2355104b2109e06ba5276485d187d023b2fd2, < 569496aa3776eea1ff0d49d0174ac1b7e861e107 | ≥ adb2355104b2109e06ba5276485d187d023b2fd2, < 920697b004e49cb026e2e15fe91be065bf0741b7 | ≥ adb2355104b2109e06ba5276485d187d023b2fd2, < d3b668b96ad3192c0581a248ae2f596cd054792a | ≥ adb2355104b2109e06ba5276485d187d023b2fd2, < 48105dc98c9ca35af418746277b087cb2bc6df7c | ≥ adb2355104b2109e06ba5276485d187d023b2fd2, < 082cd4ec240b8734a82a89ffb890216ac98fec68 | 3.9
  • linux_kernel< 4.4.272 | ≥ 4.5, < 4.9.272 | ≥ 4.10, < 4.14.236 | ≥ 4.15, < 4.19.194 | ≥ 4.20, < 5.4.125 | ≥ 5.5, < 5.10.43 | ≥ 5.11, < 5.12.10 | 5.13:rc1 | 5.13:rc2 | 5.13:rc3 | 5.13:rc4
Debian1 product
  • linux< 5.10.46-1

3 vendors · 90 products

References

14 links
Show all 14 references