CVE-2023-52810: fs/jfs: Add check for negative db_l2nbperpage
Vulnerability summary
CVE-2023-52810 is a high (CVSS 7.8) Incorrect Bitwise Shift of Integer vulnerability in linux. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 17.9% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 10 · Related 10Timeline
- 21-05-2024PublishedVulnerability first disclosed.
- 05-08-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: fs/jfs: Add check for negative db_l2nbperpage l2nbperpage is log2(number of blks per page), and the minimum legal value should be 0, not negative. In the case of l2nbperpage being negative, an error will occur when subsequently used as shift exponent. Syzbot reported this bug: UBSAN: shift-out-of-bounds in fs/jfs/jfs_dmap.c:799:12 shift exponent -16777216 is negative
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVDNIST7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.26%
Chance of exploitation in the next 30 days
Percentile
18%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.26% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu117 products
- linuxAll versions (No fix recorded) | < 5.4.0-173.191 | < 5.15.0-100.110
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.4.0-1120.130 | < 5.15.0-1056.61
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < cc61fcf7d1c99f148fe8ddfb5c6ed0bb75861f01 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 8f2964df6bfce9d92d81ca552010b8677af8d9dc | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < a81a56b4cbe3142cc99f6b98e8f9b3a631c768e1 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 524b4f203afcf87accfe387e846f33f916f0c907 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 5f148b16972e5f4592629b244d5109b15135f53f | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 0cb567e727339a192f9fd0db00781d73a91d15a6 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 491085258185ffc4fb91555b0dba895fe7656a45 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 1a7c53fdea1d189087544d9a606d249e93c4934b | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 525b861a008143048535011f3816d407940f4bfa | 2.6.12
- linux_kernel< 4.14.331 | ≥ 4.15, < 4.19.300 | ≥ 4.20, < 5.4.262 | ≥ 5.5, < 5.10.202 | ≥ 5.11, < 5.15.140 | ≥ 5.16, < 6.1.64 | ≥ 6.2, < 6.5.13 | ≥ 6.6, < 6.6.3
Debian1 product
- linux< 6.1.64-1 | < 6.6.8-1
3 vendors · 120 products
