Answer in brief
CVE-2024-49889 records a Unknown severity vulnerability in ext4: avoid use-after-free in ext4_ext_show_leaf(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/RUGGEDCOM RST2428P (generic), Siemens/SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. 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), Siemens/RUGGEDCOM RST2428P (generic), Siemens/SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=dfe5080939ea4686b3414b5d970a9b26733c57a4 <b0cb4561fc4284d04e69c8a66c8504928ab2484e || >=dfe5080939ea4686b3414b5d970a9b26733c57a4 <4999fed877bb64e3e7f9ab9996de2ca983c41928 || >=dfe5080939ea4686b3414b5d970a9b26733c57a4 <2eba3b0cc5b8de624918d21f32b5b8db59a90b39 || >=dfe5080939ea4686b3414b5d970a9b26733c57a4 <34b2096380ba475771971a778a478661a791aa15 || >=dfe5080939ea4686b3414b5d970a9b26733c57a4 <8b114f2cc7dd5d36729d040b68432fbd0f0a8868 || >=dfe5080939ea4686b3414b5d970a9b26733c57a4 <d483c7cc1796bd6a80e7b3a8fd494996260f6b67 || >=dfe5080939ea4686b3414b5d970a9b26733c57a4 <4e2524ba2ca5f54bdbb9e5153bea00421ef653f5 | b0cb4561fc4284d04e69c8a66c8504928ab2484e, 4999fed877bb64e3e7f9ab9996de2ca983c41928, 2eba3b0cc5b8de624918d21f32b5b8db59a90b39, 34b2096380ba475771971a778a478661a791aa15, 8b114f2cc7dd5d36729d040b68432fbd0f0a8868, d483c7cc1796bd6a80e7b3a8fd494996260f6b67, 4e2524ba2ca5f54bdbb9e5153bea00421ef653f5 |
| Linux/Linuxgeneric | 3.18 | Not reported |
| Siemens/RUGGEDCOM RST2428Pgeneric | >=0 <V3.2 | V3.2 |
| Siemens/SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 familygeneric | >=0 <V3.2 | V3.2 |
| Siemens/SCALANCE XCM-/XRM-/XCH-/XRH-300 familygeneric | >=0 <V3.2 | V3.2 |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Oct 21, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: ext4: avoid use-after-free in ext4_ext_show_leaf() In ext4_find_extent(), path may be freed by error or be reallocated, so using a previously saved *ppath may have been freed and thus may trigger use-after-free, as follows: ext4_split_extent path = *ppath; ext4_split_extent_at(ppath) path = ext4_find_extent(ppath) ext4_split_extent_at(ppath) // ext4_find_extent fails to free path // but zeroout succeeds ext4_ext_show_leaf(inode, path) eh = path[depth].p_hdr // path use-after-free !!! Similar to ext4_split_extent_at(), we use *ppath directly as an input to ext4_ext_show_leaf(). Fix a spelling error by the way. Same problem in ext4_ext_handle_unwritten_extents(). Since 'path' is only used in ext4_ext_show_leaf(), remove 'path' and use *ppath directly. This issue is triggered only when EXT_DEBUG is defined and therefore does not affect functionality.
Quoted source text, attributed separately from HOL analysis.