Answer in brief
CVE-2022-49879 records a Medium severity (CVSS 5.5) vulnerability in ext4: fix BUG_ON() when directory entry has invalid rec_len. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=3d0518f4758eca4339e75e5b9dbb7e06a5ce08b4 <2fa24d0274fbf913b56ee31f15bc01168669d909 || >=3d0518f4758eca4339e75e5b9dbb7e06a5ce08b4 <156451a67b93986fb07c274ef6995ff40766c5ad || >=3d0518f4758eca4339e75e5b9dbb7e06a5ce08b4 <999cff2b6ce3b45c08abf793bf55534777421327 || >=3d0518f4758eca4339e75e5b9dbb7e06a5ce08b4 <ce1ee2c8827fb6493e91acbd50f664cf2a972c3d || >=3d0518f4758eca4339e75e5b9dbb7e06a5ce08b4 <17a0bc9bd697f75cfdf9b378d5eb2d7409c91340 | 2fa24d0274fbf913b56ee31f15bc01168669d909, 156451a67b93986fb07c274ef6995ff40766c5ad, 999cff2b6ce3b45c08abf793bf55534777421327, ce1ee2c8827fb6493e91acbd50f664cf2a972c3d, 17a0bc9bd697f75cfdf9b378d5eb2d7409c91340 |
| Linux/Linuxgeneric | 2.6.30 | Not reported |
Published upstream
May 1, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 5, 2026
In the Linux kernel, the following vulnerability has been resolved: ext4: fix BUG_ON() when directory entry has invalid rec_len The rec_len field in the directory entry has to be a multiple of 4. A corrupted filesystem image can be used to hit a BUG() in ext4_rec_len_to_disk(), called from make_indexed_dir(). ------------[ cut here ]------------ kernel BUG at fs/ext4/ext4.h:2413! ... RIP: 0010:make_indexed_dir+0x53f/0x5f0 ... Call Trace: <TASK> ? add_dirent_to_buf+0x1b2/0x200 ext4_add_entry+0x36e/0x480 ext4_add_nondir+0x2b/0xc0 ext4_create+0x163/0x200 path_openat+0x635/0xe90 do_filp_open+0xb4/0x160 ? __create_object.isra.0+0x1de/0x3b0 ? _raw_spin_unlock+0x12/0x30 do_sys_openat2+0x91/0x150 __x64_sys_open+0x6c/0xa0 do_syscall_64+0x3c/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 The fix simply adds a call to ext4_check_dir_entry() to validate the directory entry, returning -EFSCORRUPTED if the entry is invalid.
Quoted source text, attributed separately from HOL analysis.