Answer in brief
CVE-2024-26884 records a Unknown severity vulnerability in bpf: Fix hashtab overflow check on 32-bit arches. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2024-26884 records a Unknown severity vulnerability in bpf: Fix hashtab overflow check on 32-bit arches. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). 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/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=daaf427c6ab392bedcd018e326b2ffa1e1110cd6 <33ec04cadb77605b71d9298311919303d390c4d5 || >=daaf427c6ab392bedcd018e326b2ffa1e1110cd6 <92c81fbb3ed2e0dfc33a4183a67135e1ab566ace || >=daaf427c6ab392bedcd018e326b2ffa1e1110cd6 <64f00b4df0597590b199b62a37a165473bf658a6 || >=daaf427c6ab392bedcd018e326b2ffa1e1110cd6 <3b08cfc65f07b1132c1979d73f014ae6e04de55d || >=daaf427c6ab392bedcd018e326b2ffa1e1110cd6 <a83fdaeaea3677b83a53f72ace2d73a19bcd6d93 || >=daaf427c6ab392bedcd018e326b2ffa1e1110cd6 <8435f0961bf3dc65e204094349bd9aeaac1f8868 || >=daaf427c6ab392bedcd018e326b2ffa1e1110cd6 <d817f0d34d927f2deb17dadbfe212c9a6a32ac3e || >=daaf427c6ab392bedcd018e326b2ffa1e1110cd6 <a6fa75b5096c0f9826a4fabe22d907b0a5bb1016 || >=daaf427c6ab392bedcd018e326b2ffa1e1110cd6 <6787d916c2cf9850c97a0a3f73e08c43e7d973b1 | 33ec04cadb77605b71d9298311919303d390c4d5, 92c81fbb3ed2e0dfc33a4183a67135e1ab566ace, 64f00b4df0597590b199b62a37a165473bf658a6, 3b08cfc65f07b1132c1979d73f014ae6e04de55d, a83fdaeaea3677b83a53f72ace2d73a19bcd6d93, 8435f0961bf3dc65e204094349bd9aeaac1f8868, d817f0d34d927f2deb17dadbfe212c9a6a32ac3e, a6fa75b5096c0f9826a4fabe22d907b0a5bb1016, 6787d916c2cf9850c97a0a3f73e08c43e7d973b1 |
| Linux/Linuxgeneric | 3.19 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Apr 17, 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: bpf: Fix hashtab overflow check on 32-bit arches The hashtab code relies on roundup_pow_of_two() to compute the number of hash buckets, and contains an overflow check by checking if the resulting value is 0. However, on 32-bit arches, the roundup code itself can overflow by doing a 32-bit left-shift of an unsigned long value, which is undefined behaviour, so it is not guaranteed to truncate neatly. This was triggered by syzbot on the DEVMAP_HASH type, which contains the same check, copied from the hashtab code. So apply the same fix to hashtab, by moving the overflow check to before the roundup.
Quoted source text, attributed separately from HOL analysis.
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/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=daaf427c6ab392bedcd018e326b2ffa1e1110cd6 <33ec04cadb77605b71d9298311919303d390c4d5 || >=daaf427c6ab392bedcd018e326b2ffa1e1110cd6 <92c81fbb3ed2e0dfc33a4183a67135e1ab566ace || >=daaf427c6ab392bedcd018e326b2ffa1e1110cd6 <64f00b4df0597590b199b62a37a165473bf658a6 || >=daaf427c6ab392bedcd018e326b2ffa1e1110cd6 <3b08cfc65f07b1132c1979d73f014ae6e04de55d || >=daaf427c6ab392bedcd018e326b2ffa1e1110cd6 <a83fdaeaea3677b83a53f72ace2d73a19bcd6d93 || >=daaf427c6ab392bedcd018e326b2ffa1e1110cd6 <8435f0961bf3dc65e204094349bd9aeaac1f8868 || >=daaf427c6ab392bedcd018e326b2ffa1e1110cd6 <d817f0d34d927f2deb17dadbfe212c9a6a32ac3e || >=daaf427c6ab392bedcd018e326b2ffa1e1110cd6 <a6fa75b5096c0f9826a4fabe22d907b0a5bb1016 || >=daaf427c6ab392bedcd018e326b2ffa1e1110cd6 <6787d916c2cf9850c97a0a3f73e08c43e7d973b1 | 33ec04cadb77605b71d9298311919303d390c4d5, 92c81fbb3ed2e0dfc33a4183a67135e1ab566ace, 64f00b4df0597590b199b62a37a165473bf658a6, 3b08cfc65f07b1132c1979d73f014ae6e04de55d, a83fdaeaea3677b83a53f72ace2d73a19bcd6d93, 8435f0961bf3dc65e204094349bd9aeaac1f8868, d817f0d34d927f2deb17dadbfe212c9a6a32ac3e, a6fa75b5096c0f9826a4fabe22d907b0a5bb1016, 6787d916c2cf9850c97a0a3f73e08c43e7d973b1 |
| Linux/Linuxgeneric | 3.19 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Apr 17, 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: bpf: Fix hashtab overflow check on 32-bit arches The hashtab code relies on roundup_pow_of_two() to compute the number of hash buckets, and contains an overflow check by checking if the resulting value is 0. However, on 32-bit arches, the roundup code itself can overflow by doing a 32-bit left-shift of an unsigned long value, which is undefined behaviour, so it is not guaranteed to truncate neatly. This was triggered by syzbot on the DEVMAP_HASH type, which contains the same check, copied from the hashtab code. So apply the same fix to hashtab, by moving the overflow check to before the roundup.
Quoted source text, attributed separately from HOL analysis.